Submission #1148854

#	Time	Username	Problem	Language	Result	Execution time	Memory
1148854		FaresSTH	Stations (IOI20_stations)	C++20	0 / 100	1 ms	516 KiB

stations

#include "bits/stdc++.h"
using namespace std;
using ll = long long;
const ll mod = 1e9 + 7, inf = 9e18;
#define all(x) x.begin(), x.end()
#define len(x) ll(x.size())
#define mp make_pair
#define S second
#define F first
vector<int> adj[1000];
int ft[1000], t;
bool v[1000];

void dfs(int i) {
    v[i] = 1;
    for (int j : adj[i]) {
        if (v[j]) continue;
        dfs(j);
    }
    ft[i] = t++;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
    for (int i = 0; i < n - 1; i++) {
        adj[u[i]].push_back(v[i]);
        adj[v[i]].push_back(u[i]);
    }
    dfs(0); vector<int> res;

    for (int i = 0; i < n; i++) {
        res.push_back(ft[i]);
        adj[i].clear();
        ft[i] = 0;
        v[i] = 0;
    }
    t = 0; return res;
}

int find_next_station(int s, int t, vector<int> ft) {
    int sum = 0;
    vector<int> dt(len(ft));
    for (int i = 1; i < len(ft) - 1; i++) {
        dt[i] = ft[i] - ft[i - 1];
        sum += ft[i] - dt[i] + 1;
    }
    dt[0] = ft[0] - (ft[0] - (s - sum)) + 1;
    int res = ft.back();

    for (int i = 0; i < len(ft) - 1; i++) {
        if (dt[i] <= t && t <= ft[i]) res = ft[i];
    }
    return res;
}

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