Submission #431579

#	Time	Username	Problem	Language	Result	Execution time	Memory
431579		yuto1115	Ancient Books (IOI17_books)	C++17	0 / 100	1 ms	256 KiB

books

#include "books.h"
#include "bits/stdc++.h"
#define rep(i, n) for(ll i = 0; i < ll(n); i++)
#define rep2(i, s, n) for(ll i = ll(s); i < ll(n); i++)
#define rrep(i, n) for(ll i = ll(n)-1; i >= 0; i--)
#define pb push_back
#define eb emplace_back
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
using namespace std;
using ll = long long;
using P = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vp = vector<P>;
using vvp = vector<vp>;
using vb = vector<bool>;
using vvb = vector<vb>;
using vs = vector<string>;
const int inf = 1001001001;
const ll linf = 1001001001001001001;

template<class T>
bool chmin(T &a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}

template<class T>
bool chmax(T &a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

ll minimum_walk(vi p, int s) {
    int n = p.size();
    vb seen(n);
    int mx = 0;
    ll ans = 0;
    rep(i, n) {
        if (seen[i]) continue;
        if (p[i] == i) continue;
        mx = i;
        int now = i;
        while (true) {
            seen[now] = true;
            ans += abs(now - p[now]);
            now = p[now];
            if (now == i) break;
        }
    }
    ans += mx * 2;
    return ans;
}

• Subtask 1: 0 / 12
• Subtask 2: 0 / 10
• Subtask 3: 0 / 28
• Subtask 4: 0 / 20
• Subtask 5: 0 / 30