Compilare: main.cpp: In function 'void solve(long long int, long long int)': main.cpp:121:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long long i = 0; i<ord.size();i++){ ~^~~~~~~~~~~ main.cpp:126:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i< chng.size() && (chng[i].time <= q[j].m)){ ~^~~~~~~~~~~~~ main.cpp:137:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pas + p2 < ord.size() && eval(ord[pas + p2], q[j].m) <= -q[j].b) ~~~~~~~~~^~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:16:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^