Submission #720554

#	Time	Username	Problem	Language	Result	Execution time	Memory
720554		hoainiem	Xylophone (JOI18_xylophone)	C++14	0 / 100	1 ms	336 KiB

xylophone

#include "xylophone.h"
#include <bits/stdc++.h>
using namespace std;
int n, root, a[5008], dis[5008][5008];
void solve(int N) {
    n = N;
    for (int i = 1; i < n; i++)
        a[i] = query(i, i + 1);
    for (int i = 1, j = 1; i + 2 <= n; i++){
        int tmp = query(i, i + 2);
        if (tmp != a[i] + a[i + 1])
            j *= -1;
        a[i + 1] *= j;
    }
    for (int i = 1; i <= n; i++){
        int cnt = 0;
        for (int j = i + 1; j <= n; j++){
            dis[i][j] = dis[i][j - 1] + a[j - 1];
            if (dis[i][j] > 0)
                cnt++;
        }
        for (int j = i - 1; j > 0; j--){
            dis[i][j] = dis[i][j + 1] - a[j];
            if (dis[i][j] > 0)
                cnt++;
        }
        if (!cnt || cnt + 1 == n){
            root = i;
            break;
        }
    }
    for (int i = 1; i <= n; i++)
        answer(i, abs(dis[root][i]) + 1);
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 36
• Subtask 3: 0 / 53