Compilare: user.cpp: In function ‘int main()’: user.cpp:24:15: warning: unused variable ‘j’ [-Wunused-variable] int n, i, j, s, t, d, k, a, b, ma; ^ user.cpp:24:18: warning: unused variable ‘s’ [-Wunused-variable] int n, i, j, s, t, d, k, a, b, ma; ^ user.cpp:24:21: warning: unused variable ‘t’ [-Wunused-variable] int n, i, j, s, t, d, k, a, b, ma; ^ user.cpp:21:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plicuri.in","r",stdin); ^ user.cpp:22:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plicuri.out","w",stdout); ^ user.cpp:26:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:28:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a, &b); ^