Submission #381178

#	Time	Username	Problem	Language	Result	Execution time	Memory
381178		vishesh312	Xylophone (JOI18_xylophone)	C++17	100 / 100	223 ms	98668 KiB

xylophone

#include "bits/stdc++.h"
#include "xylophone.h"
using namespace std;
/*
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using ordered_set = tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>;
*/

#define all(x) begin(x), end(x)
#define sz(x) (int)x.size()

using ll = long long;
const int mod = 1e9+7;

void solve(int n) {
    vector<vector<int>> diff(n+1, vector<int>(n+1));
    for (int i = 1; i < n; ++i) {
        diff[i][i+1] = query(i, i+1);
    }
    for (int i = 1; i < n-1; ++i) {
        diff[i][i+2] = query(i, i+2);
    }
    vector<int> rel(n);
    rel[1] = diff[1][2];
    bool inc = true;
    for (int i = 2; i < n; ++i) {
        inc ^= (diff[i-1][i] + diff[i][i+1] != diff[i-1][i+1]);
        rel[i] = rel[i-1] + diff[i][i+1] * (inc?1:-1);
    }
    array<int, 2> mx = {0, 0}, mn = {0, 0};
    for (int i = 1; i < n; ++i) {
        if (rel[i] > mx[0]) {
            mx = {rel[i], i};
        }
        if (rel[i] < mn[0]) {
            mn = {rel[i], i};
        }
    }
    if (mn[1] < mx[1]) {
        for (int i = 0; i < n; ++i) {
            answer(i+1, rel[i] - mn[0] + 1);
        }
    } else {
        for (int i = 0; i < n; ++i) {
            answer(i+1, mx[0] - rel[i] + 1);
        }
    }
}
/*
signed main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    int tc = 1;
    //cin >> tc;
    for (int i = 1; i <= tc; ++i) solve(i);
    return 0;
}
*/

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