oj.uz

답안 #815334

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
815334 2023-08-08T14:14:42 Z Pikachu Xylophone (JOI18_xylophone) C++17
0 / 100
 1 ms 296 KB 
#include <bits/stdc++.h>
#include "xylophone.h"

using namespace std;

const int maxn = 5010;
int a[maxn];
bool done[maxn];

void solve(int n) 
{
    int l = 1;
    int r = n;
    while (l <= r) {
        int mid = (l + r) / 2;
        if (query(mid, n) == n - 1) l = mid + 1;
        else r = mid - 1;
    }
    l--;
    // cout << l << endl;
    answer(l, 1);
    a[l] = 1;
    done[1] = true;
    for (int i = l - 1; i >= 1; i--) {
        int x = query(i, i + 1);
        int ans = -1;
        if (a[i + 1] - x <= 0 || done[a[i + 1] - x]) ans = a[i + 1] + x;
        if (a[i + 1] + x > n || done[a[i + 1] + x]) ans = a[i + 1] - x;
        if (ans == -1) {
            if (abs(a[i + 1] + x - a[i + 2]) != query(i, i + 2)) ans = a[i + 1] - x;
            else ans = a[i + 1] + x;
        }
        a[i] = ans;
        done[ans] = true;
        answer(i, a[i]);
    }
    for (int i = l + 1; i <= n; i++) {
        int x = query(i - 1, i);
        int ans = -1;
        if (a[i - 1] - x <= 0 || done[a[i - 1] - x]) ans = a[i - 1] + x;
        if (a[i - 1] + x > n || done[a[i - 1] + x]) ans = a[i - 1] - x;
        if (ans == -1) {
            if (abs(a[i - 1] + x - a[i - 2]) != query(i - 2, i)) ans = a[i - 1] - x;
            else ans = a[i - 1] + x;
        }
        a[i] = ans;
        done[ans] = true;
        answer(i, a[i]);
    }
}

Subtask #1
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 296 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Incorrect 1 ms 208 KB Wrong Answer [7]
4 Halted 0 ms 0 KB -

Subtask #2
0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 296 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Incorrect 1 ms 208 KB Wrong Answer [7]
4 Halted 0 ms 0 KB -

Subtask #3
0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 296 KB Output is correct
2 Correct 0 ms 208 KB Output is correct
3 Incorrect 1 ms 208 KB Wrong Answer [7]
4 Halted 0 ms 0 KB -