Submission #1114450

#	Time	Username	Problem	Language	Result	Execution time	Memory
1114450		sunboi	Xylophone (JOI18_xylophone)	C++17	100 / 100	197 ms	840 KiB

xylophone

#include <bits/stdc++.h>
using namespace std;
#include "xylophone.h"
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define pb push_back
#define all(a) a.begin(), a.end()
#define endl "\n"

static int A[5000];


void solve(int n){
    vector<int> diff(n+1);
    FOR(i,1,n){
        diff[i] = query(i, i+1);
    }
 
    vector<int> type(n+1, -1);
    type[1] = 1;
    FOR(i,1,n-1){
        int e = query(i, i+2);
        if (e == diff[i]+diff[i+1]){
            type[i+1] = type[i];
        }else{
            type[i+1] = type[i]^1;
        }
    }
    vector<int> a(n+1);
 
    FOR(i,1,n){
        if (type[i] == 1){
            a[i+1] = a[i]+diff[i];
        }else{
            a[i+1] = a[i]-diff[i];
        }
        
    }
    
    int mini = 1e9; int maxi = 0;
    int minind = 0; int maxind = 0;
    FOR(i,1,n+1){
        if (a[i] < mini){
            minind = i;
        }
        if (a[i] > maxi){
            maxind = i;
        }
        mini = min(mini, a[i]);
        maxi = max(maxi, a[i]);
 
    }
    // printVector(a);
    if (maxi - mini == n-1 && maxind > minind){
        FOR(i,1,n+1){
            answer(i, a[i]-(mini-1));
        }
        return;
    }
    a.clear();a.resize(n+1);
    FOR(i,1,n){
        if (type[i] == 1){
            a[i+1] = a[i]-diff[i];
        }else{
            a[i+1] = a[i]+diff[i];
        }
        
    }
 
    mini = 1e9; maxi = 0;
    FOR(i,1,n+1){
        mini = min(mini, a[i]);maxi = max(maxi, a[i]);
    }
    FOR(i,1,n+1){
        answer(i, a[i]-(mini-1));
    }
    return;
}

Compilation message (stderr)

xylophone.cpp:9:12: warning: 'A' defined but not used [-Wunused-variable]
    9 | static int A[5000];
      |            ^

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