Submission #1021370

#	Time	Username	Problem	Language	Result	Execution time	Memory
1021370		Wael	Fountain Parks (IOI21_parks)	C++17	5 / 100	158 ms	23932 KiB

parks

#include "parks.h"
//#include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;

int construct_roads(vector<int> x, vector<int> y) {
    int n = x.size();

    int N = 2e5;
    vector<map<int, int>> id(N + 1);

    for (int i = 0; i < n; ++i) {
        id[x[i]][y[i]] = i;
    }

    int cnt = 0;
    vector<int> u, v, a, b;
    for (int i = 0; i < n; ++i) {
        if (id[x[i]].count(y[i] + 2)) {
            u.push_back(i);
            v.push_back(id[x[i]][y[i] + 2]);
            a.push_back(x[i] + 1);
            b.push_back(y[i] + 1);
            ++cnt;
        }
    }

    if (cnt == n - 1) {
        build(u, v, a, b);
        return 1;
    }
    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30