Compilare: user.cpp: In function ‘int main()’: user.cpp:81:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(step=1; step<Sols.size(); step<<=1); ^ user.cpp:83:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(soli+step<Sols.size() && Sols[soli+step].first < q) ^ user.cpp:46:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("easyvect.in", "r", stdin); ^ user.cpp:47:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("easyvect.out", "w", stdout); ^