Compilare: main.cpp: In function 'long long unsigned int binsearch(long long unsigned int, long long unsigned int, long long unsigned int, int)': main.cpp:30:9: warning: variable 'stch' set but not used [-Wunused-but-set-variable] int stch = 1; ^~~~ main.cpp: In function 'int main()': main.cpp:48:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("abx.in", "r", stdin); ^ main.cpp:49:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("abx.out", "w", stdout); ^ main.cpp:51:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %llu", &N, &M); ^ main.cpp:54:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%llu", &x); ans = 1e10; ^