Submission #155141

#	Time	Username	Problem	Language	Result	Execution time	Memory
155141		karma	Xylophone (JOI18_xylophone)	C++14	100 / 100	120 ms	504 KiB

xylophone

#include "xylophone.h"
#include<bits/stdc++.h>

const int N = 6006;
int a[N], d[2][N], mx, mn, up;

void solve(int n) {
     for(int i = 1; i < n; ++i) {
        d[0][i - 1] = query(i, i + 1);
        if(i > 1) d[1][i - 2] = query(i - 1, i + 1);
     }
     a[0] = mn = mx = 0, a[1] = d[0][0], up = 1;
     if(n > 1) {
        if(a[mx] < a[1]) mx = 1;
        if(a[mn] > a[1]) mn = 1;
     }
     for(int i = 2; i < n; ++i) {
        if(d[0][i - 1] + d[0][i - 2] != d[1][i - 2]) up *= (-1);
        a[i] = a[i - 1] + up * d[0][i - 1];
        if(a[mx] < a[i]) mx = i;
        if(a[mn] > a[i]) mn = i;
     }
     if(mn < mx) {
        mn = a[mn];
        for(int i = 0; i < n; ++i) answer(i + 1, a[i] - mn + 1);
     } else {
        mx = a[mx];
        for(int i = 0; i < n; ++i) answer(i + 1, mx - a[i] + 1);
     }
}

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