Compilare: main.cpp: In function 'void build(int)': main.cpp:30:24: warning: narrowing conversion of 'power(((long long int)P[0]), ((long long int)(MOD[0] - 2)), MOD[0])' from 'long long int' to 'int' inside { } [-Wnarrowing] int aux[2] = {power(P[0], MOD[0] - 2, MOD[0]), power(P[1], MOD[1] - 2, MOD[1])}; ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:30:57: warning: narrowing conversion of 'power(((long long int)P[1]), ((long long int)(MOD[1] - 2)), MOD[1])' from 'long long int' to 'int' inside { } [-Wnarrowing] int aux[2] = {power(P[0], MOD[0] - 2, MOD[0]), power(P[1], MOD[1] - 2, MOD[1])}; ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:81:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i + l - 1 < a[1].size(); i++) { ~~~~~~~~~~^~~~~~~~~~~~~