Compilare: main.cpp: In function 'int main()': main.cpp:49:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (nr != votes[act].size()) ~~~^~~~~~~~~~~~~~~~~~~~ main.cpp:16:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("stv.in", "r", stdin); ^ main.cpp:17:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("stv.out", "w", stdout); ^