Compilare: user.cpp: In function ‘int main()’: user.cpp:29:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(c[1][i]<minant) minant=c[1][i]; ^ user.cpp:35:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=n;++i) if(c[1][i]<minim) minim=c[1][i]; ^ user.cpp:12:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("profit.in","r",stdin); ^ user.cpp:13:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("profit.out","w",stdout); ^ user.cpp:14:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:17:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i]); ^