Compilare: user.cpp: In function ‘void Build(int, int, int)’: user.cpp:36:17: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid=left+right>>1; ^ user.cpp: In function ‘std::pair<int, short int> MAX_P(int, int, int, int, int)’: user.cpp:59:17: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int mid=left+right>>1; ^ user.cpp: In function ‘int main()’: user.cpp:83:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eliminare.in","r",stdin); ^ user.cpp:84:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("eliminare.out","w",stdout); ^ user.cpp:86:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i=1,scanf("%d%d",&N,&M),lg=calc_lg(N);i<=N;++i) ^ user.cpp:88:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&X[i]); ^ user.cpp:94:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&left,&right); ^