Compilare: user.cpp: In function ‘int main()’: user.cpp:20:24: warning: unused variable ‘s’ [-Wunused-variable] int n, m, y, i, j, s, t, d, k, x; ^ user.cpp:20:27: warning: unused variable ‘t’ [-Wunused-variable] int n, m, y, i, j, s, t, d, k, x; ^ user.cpp:20:30: warning: unused variable ‘d’ [-Wunused-variable] int n, m, y, i, j, s, t, d, k, x; ^ user.cpp:20:33: warning: unused variable ‘k’ [-Wunused-variable] int n, m, y, i, j, s, t, d, k, x; ^ user.cpp:17:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("diamant.in","r",stdin); ^ user.cpp:18:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("diamant.out","w",stdout); ^ user.cpp:22:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&x); ^