import java.util.*;
public class Main{
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int A=sc.nextInt();
        int B=sc.nextInt();
        int C=sc.nextInt();
        if(A>B) {
        	int cE=C-(A-B);
        	if(cE<0) {
        		cE=0;
        	}
        	System.out.println(cE);
        }else {
        	System.out.println(C);
        }
        
        
        
    }
} import java.util.*; util.* java public class Main{
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int A=sc.nextInt();
        int B=sc.nextInt();
        int C=sc.nextInt();
        if(A>B) {
        	int cE=C-(A-B);
        	if(cE<0) {
        		cE=0;
        	}
        	System.out.println(cE);
        }else {
        	System.out.println(C);
        }
        
        
        
    }
} Main public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int A=sc.nextInt();
        int B=sc.nextInt();
        int C=sc.nextInt();
        if(A>B) {
        	int cE=C-(A-B);
        	if(cE<0) {
        		cE=0;
        	}
        	System.out.println(cE);
        }else {
        	System.out.println(C);
        }
        
        
        
    } main {
        Scanner sc=new Scanner(System.in);
        int A=sc.nextInt();
        int B=sc.nextInt();
        int C=sc.nextInt();
        if(A>B) {
        	int cE=C-(A-B);
        	if(cE<0) {
        		cE=0;
        	}
        	System.out.println(cE);
        }else {
        	System.out.println(C);
        }
        
        
        
    } Scanner sc=new Scanner(System.in); sc new Scanner(System.in) int A=sc.nextInt(); A sc.nextInt() sc.nextInt sc int B=sc.nextInt(); B sc.nextInt() sc.nextInt sc int C=sc.nextInt(); C sc.nextInt() sc.nextInt sc if(A>B) {
        	int cE=C-(A-B);
        	if(cE<0) {
        		cE=0;
        	}
        	System.out.println(cE);
        }else {
        	System.out.println(C);
        } A>B A B {
        	int cE=C-(A-B);
        	if(cE<0) {
        		cE=0;
        	}
        	System.out.println(cE);
        } int cE=C-(A-B); cE C-(A-B) C (A-B) A B if(cE<0) {
        		cE=0;
        	} cE<0 cE 0 {
        		cE=0;
        	} cE=0 cE 0 System.out.println(cE) System.out.println System.out System System.out cE {
        	System.out.println(C);
        } System.out.println(C) System.out.println System.out System System.out C String[] args args public class Main{
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int A=sc.nextInt();
        int B=sc.nextInt();
        int C=sc.nextInt();
        if(A>B) {
        	int cE=C-(A-B);
        	if(cE<0) {
        		cE=0;
        	}
        	System.out.println(cE);
        }else {
        	System.out.println(C);
        }
        
        
        
    }
} public class Main{
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int A=sc.nextInt();
        int B=sc.nextInt();
        int C=sc.nextInt();
        if(A>B) {
        	int cE=C-(A-B);
        	if(cE<0) {
        		cE=0;
        	}
        	System.out.println(cE);
        }else {
        	System.out.println(C);
        }
        
        
        
    }
} Main
import java.util.*;
public class Main{
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int A=sc.nextInt();
        int B=sc.nextInt();
        int C=sc.nextInt();
        if(A>B) {
        	int cE=C-(A-B);
        	if(cE<0) {
        		cE=0;
        	}
        	System.out.println(cE);
        }else {
        	System.out.println(C);
        }
        
        
        
    }
}