제출 #861166

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
861166		ZeroCool	Xylophone (JOI18_xylophone)	C++14	100 / 100	69 ms	1184 KiB

xylophone

#include "xylophone.h"
#include <bits/stdc++.h>
using namespace std;
int a[5001];
void solve(int n) {
    int x, y, i, u, v, mn;
    a[2] = query(1, 2);
    for (i = 2; i < n; i++) {
        x = query(i, i + 1); y = query(i - 1, i + 1);
        a[i + 1] = a[i] + x * (a[i] - a[i - 1] < 0 ? 1 : -1) * (y == x + abs(a[i] - a[i - 1]) ? -1 : 1);
    }
    mn = *min_element(a + 1, a + n + 1);
    for (i = 1; i <= n; i++) {
        a[i] -= mn;
        if (!a[i]) u = i;
        if (a[i] == n - 1) v = i;
    }
    bool flag = u < v;
    for (int i = 1; i <= n; i++) answer(i, flag ? a[i] + 1 : n - a[i]);
}

컴파일 시 표준 에러 (stderr) 메시지

xylophone.cpp: In function 'void solve(int)':
xylophone.cpp:19:40: warning: 'v' may be used uninitialized in this function [-Wmaybe-uninitialized]
   19 |     for (int i = 1; i <= n; i++) answer(i, flag ? a[i] + 1 : n - a[i]);
      |                                  ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xylophone.cpp:19:40: warning: 'u' may be used uninitialized in this function [-Wmaybe-uninitialized]

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