Codeforces 803 B. Distances to Zero （模拟

B. Distances to Zero

Description

You are given the array of integer numbers a0, a1, …, an - 1. For each element find the distance to the nearest zero (to the element which equals to zero). There is at least one zero element in the given array.

Input

The first line contains integer n (1 ≤ n ≤ 2·105) — length of the array a. The second line contains integer elements of the array separated by single spaces ( - 109 ≤ ai ≤ 109).

Output

Print the sequence d0, d1, …, dn - 1, where di is the difference of indices between i and nearest j such that aj = 0. It is possible that i = j.

Sample Input

92 1 0 3 0 0 3 2 4

50 1 2 3 4

Sample Output

2 1 0 1 0 0 1 2 3 

0 1 2 3 4 

题意

给一组数，让找这组数中每个数离0的最小距离

题解：

模拟一发， 标记0的位置 不停的比较位置大小就可以了

AC代码

#include <bits/stdc++.h>using namespace std;vector<int>v;int main(){    int n;    int x;    scanf("%d",&n);    for(int i = 0;i < n; i++) {        scanf("%d",&x);        if(x==0) v.push_back(i);    }    int k = 0;    for(int i = 0;i < n; i++) {        int  ans = abs(i-v[k]);        if(k>0) {            if(ans > 0) ans = min(ans,abs(i-v[k-1]));  // 比较和上一个零点哪个离零点小         }        if(ans == 0) k++;        if(i)            printf(" %d",ans);        else printf("%d",ans);    }    printf("\n");return 0;}