Compilare: main.cpp: In function 'long long int pw(long long int, long long int)': main.cpp:22:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'std::pair<long long int, long long int> solve(long long int)': main.cpp:46:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < pr.size() && pr[i] <= x ; i++) ~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:68:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] FastIO , FILES; ^ main.cpp:68:17: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]