Compilare: main.cpp: In function 'int main()': main.cpp:54:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i <= nrmX.size(); ++i) { ~~^~~~~~~~~~~~~~ main.cpp:55:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j <= nrmY.size(); ++j) { ~~^~~~~~~~~~~~~~ main.cpp:26:45: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri4.in", "r", stdin); ^ main.cpp:27:47: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dreptunghiuri4.out", "w", stdout); ^