Compilare: main.cpp: In function 'int main()': main.cpp:48:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=events.size();i++) ~^~~~~~~~~~~~~~~ main.cpp:94:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=events.size();i++) ~^~~~~~~~~~~~~~~ main.cpp:19:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pitmutare.in","r",stdin); ^ main.cpp:20:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pitmutare.out","w",stdout); ^ main.cpp:22:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&s); ^ main.cpp:25:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ main.cpp:30:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^