Compilare: user.cpp: In function ‘int main()’: user.cpp:14:12: warning: unused variable ‘m’ [-Wunused-variable] int n, m, i, j, k, s, t, d; ^ user.cpp:14:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, k, s, t, d; ^ user.cpp:14:30: warning: unused variable ‘d’ [-Wunused-variable] int n, m, i, j, k, s, t, d; ^ user.cpp:11:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("avarcolaci.in","r",stdin); ^ user.cpp:12:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("avarcolaci.out","w",stdout); ^ user.cpp:16:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:18:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:19:58: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for( i = 1; i <= 2 * n; ++i ) scanf("%d",&v[ i ]); ^