Compilare: main.cpp: In function 'long long int processEvents(std::vector<Event>&)': main.cpp:99:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < evs.size(); ++i) ~~^~~~~~~~~~~~ main.cpp:109:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < pnt.size(); ++i) ~~^~~~~~~~~~~~ main.cpp: In function 'long long int cntSqrs(int, int)': main.cpp:168:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < segs.size()) { ~~^~~~~~~~~~~~~ main.cpp:170:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < segs.size() && segs[i].dist == segs[j].dist) { ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:192:23: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &N); ^ main.cpp:194:78: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d", &rect[i].x1, &rect[i].y1, &rect[i].x2, &rect[i].y2); ^