Submission #1068604

#	Time	Username	Problem	Language	Result	Execution time	Memory
1068604		ArthuroWich	Ideal city (IOI12_city)	C++17	32 / 100	1066 ms	3164 KiB

city

#include<bits/stdc++.h>
using namespace std;
int DistanceSum(int n, int x[], int y[]) {
    int ans = 0;
    map<pair<int, int>, int> mp;
    for (int i = 0; i < n; i++) {
        mp[{x[i], y[i]}] = i;
    }
    vector<vector<int>> adj(n);
    for (auto c : mp) {
        auto [i, j] = c.first;
        if (mp.find({i+1, j}) != mp.end()) {
            adj[c.second].push_back(mp[{i+1, j}]);
        }
        if (mp.find({i-1, j}) != mp.end()) {
            adj[c.second].push_back(mp[{i-1, j}]);
        }
        if (mp.find({i, j+1}) != mp.end()) {
            adj[c.second].push_back(mp[{i, j+1}]);
        }
        if (mp.find({i, j-1}) != mp.end()) {
            adj[c.second].push_back(mp[{i, j-1}]);
        }
    }
    for (int i = 0; i < n; i++) {
        queue<int> q;
        vector<int> dist(n, INT_MAX);
        q.push(i);
        dist[i] = 0;
        while(!q.empty()) {
            int a = q.front();
            q.pop();
            for (int b : adj[a]) {
                if (dist[b] == INT_MAX) {
                    dist[b] = dist[a]+1;
                    q.push(b);
                }
            }
        }
        for (int j = 0; j < n; j++) {
            ans += dist[j];
        }
    }
    return ans/2;
}

• Subtask 1: 11 / 11
• Subtask 2: 21 / 21
• Subtask 3: 0 / 23
• Subtask 4: 0 / 45