Compilare: user.cpp: In function ‘int main()’: user.cpp:27:18: warning: unused variable ‘t’ [-Wunused-variable] int n, m, q, t, l, ans, b, k; ^ user.cpp:27:21: warning: unused variable ‘l’ [-Wunused-variable] int n, m, q, t, l, ans, b, k; ^ user.cpp:27:32: warning: variable ‘k’ set but not used [-Wunused-but-set-variable] int n, m, q, t, l, ans, b, k; ^ user.cpp:24:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secvmax.in", "r", stdin); ^ user.cpp:25:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("secvmax.out", "w", stdout); ^ user.cpp:29:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:31:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^ user.cpp:74:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&q); ^