Compilare: main.cpp: In function 'int main()': main.cpp:74:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("eq.in", "r", stdin); ^ main.cpp:75:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("eq.out", "w", stdout); ^ main.cpp:76:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&n,&q); ^ main.cpp:77:55: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for ( int i = 0 ; i < n ; i ++ ) scanf("%lld",&a[i]) ; ^ main.cpp:81:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&l,&r); ^