Compilare: user.cpp: In function ‘void solve()’: user.cpp:23:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<l;i++) ^ user.cpp:26:14: warning: statement has no effect [-Wunused-value] for(i;nr[i]<c && i<l;i++) ^ user.cpp:26:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i;nr[i]<c && i<l;i++) ^ user.cpp:28:14: warning: statement has no effect [-Wunused-value] for(i;nr[i]==c && i<l;i++) ^ user.cpp:28:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i;nr[i]==c && i<l;i++) ^ user.cpp: In function ‘int main()’: user.cpp:35:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("crescator3.in","r",stdin); ^ user.cpp:36:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("crescator3.out","w",stdout); ^ user.cpp:37:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%d", &n, &m); ^ user.cpp:41:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf(" %d", &m); ^