oj.uz

Submission #85984

# Submission time Handle Problem Language Result Execution time Memory
85984 2018-11-23T16:23:36 Z tjdgus4384 None (KOI17_civilization) C++14
100 / 100
 922 ms 43716 KB 
#include<cstdio>
#include<string.h>
#include<queue>
using namespace std;
queue<pair<pair<int, int>, pair<int, int> > > q;
int pa[100001], sz[100001], rk[100001], ar[2001][2001];
int dx[4] = {0, 0, 1, -1};
int dy[4] = {1, -1, 0, 0};

int find(int u)
{
    if(pa[u] == u) return u;
    return pa[u] = find(pa[u]);
}

void merge(int u, int v)
{
    u = find(u); v = find(v);
    if(u == v) return;
    if(rk[u] > rk[v]) swap(u, v);
    pa[u] = v;
    sz[v] += sz[u];
    if(rk[u] == rk[v]) rk[v]++;
}

int main()
{
    int n, k;
    scanf("%d %d", &n, &k);
    for(int i = 1;i <= k;i++)
    {
        int x, y;
        scanf("%d %d", &x, &y);
        q.push({{x, y}, {i, 0}});
        pa[i] = i;
        rk[i] = 1;
        sz[i] = 1;
    }
    while(!q.empty())
    {
        int x = q.front().first.first;
        int y = q.front().first.second;
        int s = q.front().second.first;
        int t = q.front().second.second;
        q.pop();
        if(ar[x][y] == 0)
        {
            ar[x][y] = s;
            for(int i = 0;i < 4;i++)
            {
                int nx = x + dx[i];
                int ny = y + dy[i];
                if(nx < 1 || nx > n || ny < 1 || ny > n) continue;
                if(ar[nx][ny] == 0) q.push({{nx, ny}, {s, t + 1}});
                else merge(ar[nx][ny], s);
            }
        }
        else
        {
            merge(ar[x][y], s);
        }
        if(sz[find(1)] == k)
        {
            printf("%d", t);
            return 0;
        }
    }
}

Compilation message

civilization.cpp: In function 'int main()':
civilization.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~~
civilization.cpp:33:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &x, &y);
         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 760 KB Output is correct
2 Correct 3 ms 760 KB Output is correct
3 Correct 3 ms 976 KB Output is correct
4 Correct 3 ms 976 KB Output is correct
5 Correct 3 ms 992 KB Output is correct
6 Correct 3 ms 992 KB Output is correct
7 Correct 4 ms 992 KB Output is correct
8 Correct 3 ms 992 KB Output is correct
9 Correct 3 ms 1072 KB Output is correct
10 Correct 2 ms 1072 KB Output is correct
11 Correct 3 ms 1072 KB Output is correct
12 Correct 3 ms 1072 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 760 KB Output is correct
2 Correct 3 ms 760 KB Output is correct
3 Correct 3 ms 976 KB Output is correct
4 Correct 3 ms 976 KB Output is correct
5 Correct 3 ms 992 KB Output is correct
6 Correct 3 ms 992 KB Output is correct
7 Correct 4 ms 992 KB Output is correct
8 Correct 3 ms 992 KB Output is correct
9 Correct 3 ms 1072 KB Output is correct
10 Correct 2 ms 1072 KB Output is correct
11 Correct 3 ms 1072 KB Output is correct
12 Correct 71 ms 8424 KB Output is correct
13 Correct 53 ms 8424 KB Output is correct
14 Correct 63 ms 8424 KB Output is correct
15 Correct 51 ms 8424 KB Output is correct
16 Correct 11 ms 8424 KB Output is correct
17 Correct 197 ms 22200 KB Output is correct
18 Correct 227 ms 22236 KB Output is correct
19 Correct 240 ms 22244 KB Output is correct
20 Correct 244 ms 22288 KB Output is correct
21 Correct 212 ms 22288 KB Output is correct
22 Correct 2 ms 22288 KB Output is correct
23 Correct 65 ms 22288 KB Output is correct
24 Correct 3 ms 1072 KB Output is correct

Subtask #3
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 760 KB Output is correct
2 Correct 3 ms 760 KB Output is correct
3 Correct 3 ms 976 KB Output is correct
4 Correct 3 ms 976 KB Output is correct
5 Correct 3 ms 992 KB Output is correct
6 Correct 3 ms 992 KB Output is correct
7 Correct 4 ms 992 KB Output is correct
8 Correct 3 ms 992 KB Output is correct
9 Correct 3 ms 1072 KB Output is correct
10 Correct 2 ms 1072 KB Output is correct
11 Correct 3 ms 1072 KB Output is correct
12 Correct 71 ms 8424 KB Output is correct
13 Correct 53 ms 8424 KB Output is correct
14 Correct 63 ms 8424 KB Output is correct
15 Correct 51 ms 8424 KB Output is correct
16 Correct 11 ms 8424 KB Output is correct
17 Correct 197 ms 22200 KB Output is correct
18 Correct 227 ms 22236 KB Output is correct
19 Correct 240 ms 22244 KB Output is correct
20 Correct 244 ms 22288 KB Output is correct
21 Correct 212 ms 22288 KB Output is correct
22 Correct 2 ms 22288 KB Output is correct
23 Correct 65 ms 22288 KB Output is correct
24 Correct 188 ms 22288 KB Output is correct
25 Correct 320 ms 22288 KB Output is correct
26 Correct 136 ms 22288 KB Output is correct
27 Correct 200 ms 22288 KB Output is correct
28 Correct 126 ms 22288 KB Output is correct
29 Correct 759 ms 34700 KB Output is correct
30 Correct 691 ms 34700 KB Output is correct
31 Correct 812 ms 42696 KB Output is correct
32 Correct 904 ms 42696 KB Output is correct
33 Correct 922 ms 43716 KB Output is correct
34 Correct 234 ms 43716 KB Output is correct
35 Correct 3 ms 43716 KB Output is correct
36 Correct 3 ms 1072 KB Output is correct