Compilare: user.cpp: In function ‘int main()’: user.cpp:40:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, pos; ^ user.cpp:37:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("heavymetal.in", "r", stdin); ^ user.cpp:38:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("heavymetal.out", "w", stdout); ^ user.cpp:42:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:43:72: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1; i<=N; i++) scanf("%d %d", &bands[i].left, &bands[i].right); ^ user.cpp: In function ‘int BinSearch(int)’: user.cpp:17:26: warning: ‘Closest’ may be used uninitialized in this function [-Wmaybe-uninitialized] int Begin, End, Mid, Closest; ^