Compilare: main.cpp: In function 'int main()': main.cpp:63:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < z.size() ; i ++) ~~^~~~~~~~~~ main.cpp:36:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("zebughil.in" , "r" , stdin); ^ main.cpp:37:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("zebughil.out" , "w" , stdout); ^ main.cpp:41:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%lld" , &n , &G); ^ main.cpp:43:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lld" , &v[i]); ^