oj.uz

Submission #140682

# Submission time Handle Problem Language Result Execution time Memory
140682 2019-08-04T12:41:18 Z khrbuddy03 None (KOI17_civilization) C++14
54 / 100
 1000 ms 54712 KB 
#include <bits/stdc++.h>

using namespace std;

const int inf = 2e3 + 9;
const int dx[4] = {-1, 1, 0, 0};
const int dy[4] = {0, 0, -1, 1};

struct state {
    int dist, y, x;
};

struct ds {
    int par[inf * inf], siz[inf * inf];
    inline int find(int u) {
        if (u == par[u]) return u;
        return par[u] = find(par[u]);
    }
    inline void merge(int u, int v) {
        u = find(u); v = find(v);
        if (u == v) return;
        par[u] = v;
        siz[v] += siz[u];
        siz[u] = 0;
    }
} cul;

int n, m;
int vis[inf][inf];

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    cin >> n >> m;
    for (int i = 0; i < n * n; ++i) cul.par[i] = i;
    memset(vis, -1, sizeof(vis));
    queue<state> q;
    for (int i = 0; i < m; i++) {
        int x, y; cin >> x >> y;
        cul.siz[--y * n + --x] = 1;
        q.push({0, y, x});
        vis[y][x] = y * n + x;
    }
    while (!q.empty()) {
        state s = q.front();
        int dist = s.dist;
        int y = s.y, x = s.x;
        int here = y * n + x;
        q.pop();
        cul.merge(here, vis[y][x]);
        for (int i = 0; i < 4; ++i) {
            int ny = y + dy[i], nx = x + dx[i];
            if (ny < 0 || ny >= n || nx < 0 || nx >= n) continue;
            int there = ny * n + nx;
            if (cul.siz[cul.find(there)] && cul.siz[cul.find(here)]) cul.merge(there, here);
            if (vis[ny][nx] == -1) {
                q.push({dist + 1, ny, nx});
                vis[ny][nx] = here;
            }
        }
        if (cul.siz[cul.find(here)] == m) {
            cout << dist << '\n';
            break;
        }
    }
}

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 16248 KB Output is correct
2 Correct 16 ms 16248 KB Output is correct
3 Correct 17 ms 16248 KB Output is correct
4 Correct 16 ms 16216 KB Output is correct
5 Correct 16 ms 16252 KB Output is correct
6 Correct 16 ms 16248 KB Output is correct
7 Correct 16 ms 16248 KB Output is correct
8 Correct 16 ms 16312 KB Output is correct
9 Correct 16 ms 16248 KB Output is correct
10 Correct 15 ms 16248 KB Output is correct
11 Correct 16 ms 16248 KB Output is correct
12 Correct 17 ms 16248 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 16248 KB Output is correct
2 Correct 16 ms 16248 KB Output is correct
3 Correct 17 ms 16248 KB Output is correct
4 Correct 16 ms 16216 KB Output is correct
5 Correct 16 ms 16252 KB Output is correct
6 Correct 16 ms 16248 KB Output is correct
7 Correct 16 ms 16248 KB Output is correct
8 Correct 16 ms 16312 KB Output is correct
9 Correct 16 ms 16248 KB Output is correct
10 Correct 15 ms 16248 KB Output is correct
11 Correct 16 ms 16248 KB Output is correct
12 Correct 116 ms 24044 KB Output is correct
13 Correct 88 ms 23932 KB Output is correct
14 Correct 117 ms 24064 KB Output is correct
15 Correct 88 ms 24084 KB Output is correct
16 Correct 31 ms 22392 KB Output is correct
17 Correct 289 ms 28920 KB Output is correct
18 Correct 297 ms 28920 KB Output is correct
19 Correct 292 ms 28920 KB Output is correct
20 Correct 305 ms 28792 KB Output is correct
21 Correct 299 ms 29000 KB Output is correct
22 Correct 22 ms 24056 KB Output is correct
23 Correct 132 ms 24104 KB Output is correct
24 Correct 17 ms 16248 KB Output is correct

Subtask #3
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 16248 KB Output is correct
2 Correct 16 ms 16248 KB Output is correct
3 Correct 17 ms 16248 KB Output is correct
4 Correct 16 ms 16216 KB Output is correct
5 Correct 16 ms 16252 KB Output is correct
6 Correct 16 ms 16248 KB Output is correct
7 Correct 16 ms 16248 KB Output is correct
8 Correct 16 ms 16312 KB Output is correct
9 Correct 16 ms 16248 KB Output is correct
10 Correct 15 ms 16248 KB Output is correct
11 Correct 16 ms 16248 KB Output is correct
12 Correct 116 ms 24044 KB Output is correct
13 Correct 88 ms 23932 KB Output is correct
14 Correct 117 ms 24064 KB Output is correct
15 Correct 88 ms 24084 KB Output is correct
16 Correct 31 ms 22392 KB Output is correct
17 Correct 289 ms 28920 KB Output is correct
18 Correct 297 ms 28920 KB Output is correct
19 Correct 292 ms 28920 KB Output is correct
20 Correct 305 ms 28792 KB Output is correct
21 Correct 299 ms 29000 KB Output is correct
22 Correct 22 ms 24056 KB Output is correct
23 Correct 132 ms 24104 KB Output is correct
24 Correct 332 ms 45272 KB Output is correct
25 Correct 424 ms 47452 KB Output is correct
26 Correct 297 ms 46608 KB Output is correct
27 Correct 354 ms 45764 KB Output is correct
28 Correct 271 ms 45304 KB Output is correct
29 Execution timed out 1034 ms 54712 KB Time limit exceeded
30 Halted 0 ms 0 KB -