Compilare: main.cpp: In function 'int main()': main.cpp:32:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<sol.size(); i++) ~^~~~~~~~~~~ main.cpp:26:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("cumpanit.in", "r",stdin); ^ main.cpp:27:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cumpanit.out", "w",stdout); ^ main.cpp:29:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &a, &b); ^