Compilare: main.cpp: In function 'int main()': main.cpp:36:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i+1 ; j < v.size() ; j++) ~~^~~~~~~~~~ main.cpp:14:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cifre5.in","r",stdin); ^ main.cpp:15:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cifre5.out","w",stdout); ^