Compilare: main.cpp: In function 'int main()': main.cpp:91:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v.size();i++) ~^~~~~~~~~ main.cpp:77:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("immortal.in","r",stdin); ^ main.cpp:78:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("immortal.out","w",stdout); ^