#include <bits/stdc++.h>
int main(int argc, char** argv) {
  const int array[] = {
      1,     4,     9,     16,    25,    36,    49,    64,    81,    100,
      121,   144,   169,   196,   225,   256,   289,   324,   361,   400,
      441,   484,   529,   576,   625,   676,   729,   784,   841,   900,
      961,   1024,  1089,  1156,  1225,  1296,  1369,  1444,  1521,  1600,
      1681,  1764,  1849,  1936,  2025,  2116,  2209,  2304,  2401,  2500,
      2601,  2704,  2809,  2916,  3025,  3136,  3249,  3364,  3481,  3600,
      3721,  3844,  3969,  4096,  4225,  4356,  4489,  4624,  4761,  4900,
      5041,  5184,  5329,  5476,  5625,  5776,  5929,  6084,  6241,  6400,
      6561,  6724,  6889,  7056,  7225,  7396,  7569,  7744,  7921,  8100,
      8281,  8464,  8649,  8836,  9025,  9216,  9409,  9604,  9801,  10000,
      10201, 10404, 10609, 10816, 11025, 11236, 11449, 11664, 11881, 12100,
      12321, 12544, 12769, 12996, 13225, 13456, 13689, 13924, 14161, 14400,
      14641, 14884, 15129, 15376, 15625, 15876, 16129, 16384, 16641, 16900,
      17161, 17424, 17689, 17956, 18225, 18496, 18769, 19044, 19321, 19600,
      19881, 20164, 20449, 20736, 21025, 21316, 21609, 21904, 22201, 22500,
      22801, 23104, 23409, 23716, 24025, 24336, 24649, 24964, 25281, 25600,
      25921, 26244, 26569, 26896, 27225, 27556, 27889, 28224, 28561, 28900,
      29241, 29584, 29929, 30276, 30625, 30976, 31329, 31684, 32041, 32400,
      32761, 33124, 33489, 33856, 34225, 34596, 34969, 35344, 35721, 36100,
      36481, 36864, 37249, 37636, 38025, 38416, 38809, 39204, 39601, 40000,
      40401, 40804, 41209, 41616, 42025, 42436, 42849, 43264, 43681, 44100,
      44521, 44944, 45369, 45796, 46225, 46656, 47089, 47524, 47961, 48400,
      48841, 49284, 49729, 50176, 50625, 51076, 51529, 51984, 52441, 52900,
      53361, 53824, 54289, 54756, 55225, 55696, 56169, 56644, 57121, 57600,
      58081, 58564, 59049, 59536, 60025, 60516, 61009, 61504, 62001, 62500,
      63001, 63504, 64009, 64516, 65025, 65536, 66049, 66564, 67081, 67600,
      68121, 68644, 69169, 69696, 70225, 70756, 71289, 71824, 72361, 72900,
      73441, 73984, 74529, 75076, 75625, 76176, 76729, 77284, 77841, 78400,
      78961, 79524, 80089, 80656, 81225, 81796, 82369, 82944, 83521, 84100,
      84681, 85264, 85849, 86436, 87025, 87616, 88209, 88804, 89401, 90000,
      90601, 91204, 91809, 92416, 93025, 93636, 94249, 94864, 95481, 96100,
      96721, 97344, 97969, 98596, 99225, 99856};
  char a[10], b[10];
  int x;
  int i;
  const char* answer = "No";
  scanf("%s%s", a, b);
  strcat(a, b);
  x = atoi(a);
  for (i = 0; i < sizeof(array) / sizeof(*array); ++i) {
    if (x == array[i]) {
      answer = "Yes";
      break;
    }
  }
  printf("%s\n", answer);
}
