Submission #368417

#	Time	Username	Problem	Language	Result	Execution time	Memory
368417		RyoPham	Xylophone (JOI18_xylophone)	C++14	0 / 100	1 ms	364 KiB

xylophone

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

using namespace std;

#define sz(x) (int)x.size()
#define fi first
#define se second

typedef long long lli;
typedef pair<int, int> pii;

const int maxn = 5005;

int n;
int a[maxn];

int f[maxn], g[maxn];

int b[maxn];

void build_b(int sign)
{
    b[2] = (sign ? 1 : -1) * f[1];
    for(int i = 3; i <= n; ++i)
    {
        if(g[i - 2] != f[i - 2] + f[i - 1])
            sign ^= 1;
        b[i] = b[i - 1] + (sign ? 1 : -1) * f[i - 1];
    }
}

void solve(int N)
{
    n = N;
    if(N == 2)
    {
        answer(1, 1);
        answer(1, 2);
        return;
    }
    for(int i = 1; i < n; ++i)
        f[i] = query(i, i + 1);
    for(int i = 1; i < n - 1; ++i)
        g[i] = query(i, i + 2);
    build_b(1);
    pii mn = pii(0, 1), mx = pii(0, 1);
    for(int i = 2; i <= n; ++i)
    {
        mn = min(mn, pii(b[i], i));
        mx = max(mx, pii(b[i], i));
    }
    if(mn.se > mx.se)
        build_b(0);
    mn = mx = pii(0, 1);
    for(int i = 2; i <= n; ++i)
    {
        mn = min(mn, pii(b[i], i));
        mx = max(mx, pii(b[i], i));
    }
    for(int i = 1; i <= n; ++i)
        answer(i, b[i] - mn.fi + 1);
}

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