Compilare: user.cpp: In function ‘int main()’: user.cpp:41:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (t==0&&m.size()<k) { ^ user.cpp:21:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,t; ^ user.cpp:19:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("planificare.in","r",stdin); ^ user.cpp:20:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("planificare.out","w",stdout); ^ user.cpp:22:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&k); ^ user.cpp:24:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&v[i].a,&v[i].b); ^