import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int[] a = new int[n];
        int[] b = new int[n];
        boolean[] success = new boolean[n];
        Arrays.fill(success, false);
        for(int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            b[i] = sc.nextInt();
        }
        if(a[0] == b[0]){
        success[0] = true;
        count++;
        }

        for(int i = 1; i < n; i++) {
            if(count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
            if(a[i] == b[i] && (count == 0 || success[i - 1])){
            count++;
            success[i] = true;
            }
            else if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            }
            if (count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int[] a = new int[n];
        int[] b = new int[n];
        boolean[] success = new boolean[n];
        Arrays.fill(success, false);
        for(int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            b[i] = sc.nextInt();
        }
        if(a[0] == b[0]){
        success[0] = true;
        count++;
        }

        for(int i = 1; i < n; i++) {
            if(count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
            if(a[i] == b[i] && (count == 0 || success[i - 1])){
            count++;
            success[i] = true;
            }
            else if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            }
            if (count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int[] a = new int[n];
        int[] b = new int[n];
        boolean[] success = new boolean[n];
        Arrays.fill(success, false);
        for(int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            b[i] = sc.nextInt();
        }
        if(a[0] == b[0]){
        success[0] = true;
        count++;
        }

        for(int i = 1; i < n; i++) {
            if(count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
            if(a[i] == b[i] && (count == 0 || success[i - 1])){
            count++;
            success[i] = true;
            }
            else if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            }
            if (count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int[] a = new int[n];
        int[] b = new int[n];
        boolean[] success = new boolean[n];
        Arrays.fill(success, false);
        for(int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            b[i] = sc.nextInt();
        }
        if(a[0] == b[0]){
        success[0] = true;
        count++;
        }

        for(int i = 1; i < n; i++) {
            if(count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
            if(a[i] == b[i] && (count == 0 || success[i - 1])){
            count++;
            success[i] = true;
            }
            else if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            }
            if (count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc int count = 0; count 0 int[] a = new int[n]; a new int[n] n int[] b = new int[n]; b new int[n] n boolean[] success = new boolean[n]; success new boolean[n] n Arrays.fill(success, false) Arrays.fill Arrays success false for(int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            b[i] = sc.nextInt();
        } int i = 0; int i = 0; i 0 i < n i n i++ i++ i {
            a[i] = sc.nextInt();
            b[i] = sc.nextInt();
        } {
            a[i] = sc.nextInt();
            b[i] = sc.nextInt();
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc b[i] = sc.nextInt() b[i] b i sc.nextInt() sc.nextInt sc if(a[0] == b[0]){
        success[0] = true;
        count++;
        } a[0] == b[0] a[0] a 0 b[0] b 0 {
        success[0] = true;
        count++;
        } success[0] = true success[0] success 0 true count++ count for(int i = 1; i < n; i++) {
            if(count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
            if(a[i] == b[i] && (count == 0 || success[i - 1])){
            count++;
            success[i] = true;
            }
            else if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            }
            if (count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
        } int i = 1; int i = 1; i 1 i < n i n i++ i++ i {
            if(count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
            if(a[i] == b[i] && (count == 0 || success[i - 1])){
            count++;
            success[i] = true;
            }
            else if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            }
            if (count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
        } {
            if(count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
            if(a[i] == b[i] && (count == 0 || success[i - 1])){
            count++;
            success[i] = true;
            }
            else if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            }
            if (count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
        } if(count == 3) {
                System.out.println("Yes");
                System.exit(0);
            } count == 3 count 3 {
                System.out.println("Yes");
                System.exit(0);
            } System.out.println("Yes") System.out.println System.out System System.out "Yes" System.exit(0) System.exit System 0 if(a[i] == b[i] && (count == 0 || success[i - 1])){
            count++;
            success[i] = true;
            }
            else if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            } a[i] == b[i] && (count == 0 || success[i - 1]) a[i] == b[i] a[i] a i b[i] b i (count == 0 || success[i - 1]) count == 0 count 0 success[i - 1] success i - 1 i 1 {
            count++;
            success[i] = true;
            } count++ count success[i] = true success[i] success i true if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            } a[i] == b[i] a[i] a i b[i] b i {
                success[i] = true;
            } success[i] = true success[i] success i true if(a[i] != b[i]) {
                count = 0;
            } a[i] != b[i] a[i] a i b[i] b i {
                count = 0;
            } count = 0 count 0 if (count == 3) {
                System.out.println("Yes");
                System.exit(0);
            } count == 3 count 3 {
                System.out.println("Yes");
                System.exit(0);
            } System.out.println("Yes") System.out.println System.out System System.out "Yes" System.exit(0) System.exit System 0 System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int[] a = new int[n];
        int[] b = new int[n];
        boolean[] success = new boolean[n];
        Arrays.fill(success, false);
        for(int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            b[i] = sc.nextInt();
        }
        if(a[0] == b[0]){
        success[0] = true;
        count++;
        }

        for(int i = 1; i < n; i++) {
            if(count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
            if(a[i] == b[i] && (count == 0 || success[i - 1])){
            count++;
            success[i] = true;
            }
            else if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            }
            if (count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int[] a = new int[n];
        int[] b = new int[n];
        boolean[] success = new boolean[n];
        Arrays.fill(success, false);
        for(int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            b[i] = sc.nextInt();
        }
        if(a[0] == b[0]){
        success[0] = true;
        count++;
        }

        for(int i = 1; i < n; i++) {
            if(count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
            if(a[i] == b[i] && (count == 0 || success[i - 1])){
            count++;
            success[i] = true;
            }
            else if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            }
            if (count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        int[] a = new int[n];
        int[] b = new int[n];
        boolean[] success = new boolean[n];
        Arrays.fill(success, false);
        for(int i = 0; i < n; i++) {
            a[i] = sc.nextInt();
            b[i] = sc.nextInt();
        }
        if(a[0] == b[0]){
        success[0] = true;
        count++;
        }

        for(int i = 1; i < n; i++) {
            if(count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
            if(a[i] == b[i] && (count == 0 || success[i - 1])){
            count++;
            success[i] = true;
            }
            else if(a[i] == b[i]) {
                success[i] = true;
            }
            else if(a[i] != b[i]) {
                count = 0;
            }
            if (count == 3) {
                System.out.println("Yes");
                System.exit(0);
            }
        }
        System.out.println("No");
    }
}