Submission #1098866

#	Time	Username	Problem	Language	Result	Execution time	Memory
1098866		not_amir	Stranded Far From Home (BOI22_island)	C++14	100 / 100	113 ms	21452 KiB

island

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

typedef pair<int, int> pii;
typedef long long ll;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n, m;
    cin >> n >> m;
    vector<pii> village(n);
    vector<vector<int>> G(n + 1);
    vector<int> parent(n + 1), parent1(n + 1);
    vector<ll> vsize(n + 1);
    for(int i = 1; i <= n; i++) {
        int a;
        cin >> a;
        village[i - 1] = {a, i};
        parent1[i] = parent[i] = i;
    }
    sort(village.begin(), village.end());
    for(int i = 1; i <= m; i++) {
        int a, b;
        cin >> a >> b;
        G[a].push_back(b);
        G[b].push_back(a);
    }
    vector<bool> visited(n + 1);
    for(auto [vs, v] : village) {
        vsize[v] = vs;
        visited[v] = true;
        for(int u : G[v]) {
            if(!visited[u]) continue;
            while(u != parent[u])
                u = parent[u] = parent[parent[u]];
            if(u == v)
                continue;
            vsize[v] += vsize[u];
            parent[u] = v;
            if(vsize[u] >= vs)
                parent1[u] = v;
        }
    }
    int v = village.back().second;
    for(int i = 1; i <= n; i++) {
        int u = i;
        while(u != parent1[u])
            u = parent1[u] = parent1[parent1[u]];
        if(u == v)
            cout << '1';
        else
            cout << '0';
    }
}

Compilation message (stderr)

island.cpp: In function 'int main()':
island.cpp:30:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   30 |     for(auto [vs, v] : village) {
      |              ^

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 30 / 30
• Subtask 5: 35 / 35