qq_38140099的博客

#include <iostream>#include <stdio.h>//error: reference to 'left' is ambiguous|把left换成left_就好了using namespace std;const int maxn=500010;const int INF=0x7fffffff;int s[maxn],left_[maxn],right_[max

1.反转int数组：void g(int t)//反转从第一个到第t个数{ for(int i=0; i<(n-t+1)/2; i++) swap(a[i],a[n-i-t]);}2.输入的int数组不知道元素个数，用vector+getchar()#include <bits/stdc++.h>using namespace std;vector<int> v;i