Rmq

参考博客：http://blog.youkuaiyun.com/bingshangjiguang/article/details/5673692

附模板：

#include<cstdio>
#include<cmath>
#include<algorithm>
using namespace std;

const int Max = 1000 + 5;

int gt[Max], n, st[Max][30];

void getSt()
{
    for (int i = 1;i <= n;++i)
        st[i][0] = gt[i];//最大是本身
    for (int j = 1;1 << j <= n;++j)
        for (int i = 1;i + (1 << j) - 1 <= n;++i)
            st[i][j] = max(st[i][j - 1], st[i + (1 << (j - 1))][j - 1]);
}

int toRmq(int l, int r)
{
    int k;
    for (k = 0;(1 << k) <= r - l + 1; k++);
    k--;
    return max(st[l][k], st[r - (1 << k) + 1][k]);//求最大最小值，就算两个区间有重合也没关系
}

int main()
{
    int t;scanf("%d", &t);
    while (t--)
    {
        scanf("%d", &n);
        for (int i = 1;i <= n;++i)
            scanf("%d", gt + i);
        int q;scanf("%d", &q);
        getSt();
        for (int i = 0;i < q;++i)
        {
            int l, r;scanf("%d%d", &l, &r);
            printf("%d\n", toRmq(l, r));
        }
    }
    return 0;
}