Compilare: main.cpp: In function 'int main()': main.cpp:41:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("provocare.in", "r", stdin); ^ main.cpp:42:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("provocare.out", "w", stdout); ^ main.cpp:44:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:57:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &a, &b); ^ main.cpp: In function 'long long int bs(long long int, long long int)': main.cpp:38:12: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized] return last; ^~~~