Compilare: user.cpp: In function ‘int main()’: user.cpp:19:12: warning: unused variable ‘m’ [-Wunused-variable] int n, m, i, j, s, t, d, k, ma; ^ user.cpp:19:21: warning: unused variable ‘s’ [-Wunused-variable] int n, m, i, j, s, t, d, k, ma; ^ user.cpp:19:24: warning: unused variable ‘t’ [-Wunused-variable] int n, m, i, j, s, t, d, k, ma; ^ user.cpp:16:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsir1000.in","r",stdin); ^ user.cpp:17:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsir1000.out","w",stdout); ^ user.cpp:22:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:24:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&k); ^