Compilare: main.cpp: In member function 'void multime::merge(const multime&)': main.cpp:17:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size() ; ++i){ ~~^~~~~~~~~~ main.cpp:18:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < B.v.size() && B.v[j].first < v[i].first) ++j; ~~^~~~~~~~~~~~ main.cpp:19:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j >= B.v.size()) break ; ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:36:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ausoara.in", "r", stdin); ^ main.cpp:37:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ausoara.out", "w", stdout); ^ main.cpp:39:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:44:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &k); ^ main.cpp:46:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ main.cpp:56:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &k); ^ main.cpp:62:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^