0_0_32370220_28600.cpp: In function 'int main()': 0_0_32370220_28600.cpp:10:21: error: 'sqrt' was not declared in this scope for(int t=sqrt(2*m);t>=1;t--) ^ 0_0_32370220_28600.cpp:15:3: error: expected ';' before '}' token } ^