Submission #436451

#	Time	Username	Problem	Language	Result	Execution time	Memory
436451		yuto1115	Stations (IOI20_stations)	C++17	52.32 / 100	1305 ms	688 KiB

stations

#include "stations.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>;

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;
}

vi label(int n, int k, vi u, vi v) {
    vvi G(n);
    rep(i, n - 1) {
        G[u[i]].pb(v[i]);
        G[v[i]].pb(u[i]);
    }
    int idx = 0;
    vi in(n), out(n);
    auto dfs = [&](auto &dfs, int now, int p) -> void {
        in[now] = idx++;
        for (int nx : G[now]) {
            if (nx == p) continue;
            dfs(dfs, nx, now);
        }
        out[now] = idx - 1;
    };
    dfs(dfs, 0, -1);
    vi res(n);
    rep(i, n) {
        res[i] = in[i] * 1000 + out[i];
    }
    return res;
}

bool in(int i, int j) {
    j /= 1000;
    return i / 1000 <= j and j <= i % 1000;
}

int find_next_station(int s, int t, vi c) {
    int p = -1;
    for (int i : c) {
        if (i < s) {
            p = i;
            continue;
        }
        if (in(i, t)) return i;
    }
    assert(p != -1);
    return p;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 26.3205 / 61