Compilare: main.cpp: In function 'int main()': main.cpp:63:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("biscuiti.in","r",stdin); ^ main.cpp:64:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("biscuiti.out","w",stdout); ^ main.cpp:65:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:67:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lli",&v[i]); ^ main.cpp:48:15: warning: assuming signed overflow does not occur when assuming that (X + c) >= X is always true [-Wstrict-overflow] if(st > y || dr < x) return; ~~~^~~ main.cpp:48:15: warning: assuming signed overflow does not occur when assuming that (X + c) >= X is always true [-Wstrict-overflow] if(st > y || dr < x) return; ~~~^~~