HDU6098(Inversion)

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=6098

从小到大排序,下标跟着一块儿排,对于每一个b[i],都在A数组里面从后向前找,碰到第一个下标不是 i 的倍数的位置,对应的值就是要找的b[i]。

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <memory.h>
using namespace std;

const int maxn = 100000 + 10;
struct node{
    int pos, val;
};
node a[maxn];
int b[maxn];
int n;

int cmp(const node& a, const node& b){
    return a.val < b.val;
}

int main()
{
    int t;

    scanf("%d", &t);
    while (t > 0){
        t--;
        memset(b, 0, sizeof(b));

        scanf("%d", &n);
        for (int i=1; i<=n; i++){
            scanf("%d", &a[i].val);
            a[i].pos = i;
        }

        sort(a+1, a+n+1, cmp);

        for (int i=n; i>1; i--){
            int j = n;
            while (j >= 1 && a[j].pos % i == 0) j--;
            b[i] = a[j].val;
        }

        for (int i=2; i<n; i++) printf("%d ", b[i]);
        printf("%d\n", b[n]);
    }
    return 0;
}


猜你喜欢

转载自blog.csdn.net/qust1508060414/article/details/77096263