View Compilation Error

0_0_39553563_406.cpp: In function 'long long int getSG(long long int, long long int)':
0_0_39553563_406.cpp:49:15: error: 'sqrt' was not declared in this scope
   49 |   for (ll i = sqrt(s * 1.0) + 1; i >= 0; i--) {
      |               ^~~~