Compilare: user.cpp: In function ‘int main()’: user.cpp:15:24: warning: unused variable ‘s’ [-Wunused-variable] int n, i, j, k, t, s, m; ^ user.cpp:15:27: warning: unused variable ‘m’ [-Wunused-variable] int n, i, j, k, t, s, m; ^ user.cpp:12:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("div3.in","r",stdin); ^ user.cpp:13:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("div3.out","w",stdout); ^ user.cpp:17:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&k,&n); ^ user.cpp:18:80: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for ( i = 1; i <= k; ++i ) scanf("%d",&cifre[ i ]), ant[ cifre[ i ] % 3 ]++; ^