제출 #1208176

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1208176		jasonic	Ancient Books (IOI17_books)	C++20	0 / 100	0 ms	324 KiB

books

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define fastIO cin.tie(0); ios::sync_with_stdio(false)
#define cerr if(0) cout

int n;

ll minimum_walk(vector<int> p, int s) {
    n = size(p);
    vector<bool> vis(n, false);
    assert(s == 0);
    ll ans = 0;

    for(ll l = 0, i = 0, r = 0, size = 0; i < n; i++) {
        if(p[i] != i && !vis[i]) {
            vis[i] = true;
            ll prev = i;
            ll curr = p[i];
            while(curr != i) {
                vis[curr] = true;
                size += abs(prev - curr);
                r = max(curr, r);
                prev = curr;
                curr = p[curr];
            }
            size += abs(prev - curr);
        }
        if(i == r) {
            ans += size + (size!=0?l:0);
            l = r+1;
        }
    }
    return ans;
}

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