Compilare: user.cpp: In function ‘int main()’: user.cpp:13:13: warning: unused variable ‘maxx’ [-Wunused-variable] int n,i,maxx=-1,cnt=0,j,k,sum=0; ^ user.cpp:13:21: warning: unused variable ‘cnt’ [-Wunused-variable] int n,i,maxx=-1,cnt=0,j,k,sum=0; ^ user.cpp:11:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("custi.in","r",stdin); ^ user.cpp:12:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("custi.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:18:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&m[i][j]); ^