Compilare: main.cpp: In function 'int main()': main.cpp:38:21: warning: format '%lld' expects argument of type 'long long int*', but argument 2 has type 'int*' [-Wformat=] scanf("%lld", &n); ^ main.cpp:36:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pairs.in", "r", stdin); ^ main.cpp:37:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pairs.out", "w", stdout); ^ main.cpp:38:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &n); ^ main.cpp:40:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] { scanf("%d", &v[i]); ^