oj.uz

Submission #85957

# Submission time Handle Problem Language Result Execution time Memory
85957 2018-11-23T10:56:47 Z tjdgus4384 None (KOI17_civilization) C++14
19 / 100
 1000 ms 23008 KB 
#include<cstdio>
#include<vector>
#include<string.h>
using namespace std;
int world[2001][2001];
int chk[2001][2001];
int dx[4] = {0, 0, 1, -1};
int dy[4] = {1, -1, 0, 0};
vector<pair<int, int> > v;

void dfs(int x, int y)
{
    chk[x][y] = 1;
    for(int i = 0;i < 4;i++)
    {
        int nx = x + dx[i];
        int ny = y + dy[i];
        if(!chk[nx][ny] && world[nx][ny]) dfs(nx, ny);
    }
}

int main()
{
    int n, k, x, y;
    scanf("%d %d", &n, &k);
    for(int i = 0;i < k;i++)
    {
        scanf("%d %d", &x, &y);
        v.push_back({x, y});
        world[x][y] = 1;
    }
    int ans = 0;
    while(1)
    {
        memset(chk, 0, sizeof(chk));
        dfs(v[0].first, v[0].second);
        bool all = false;
        for(int i = 1;i < v.size();i++)
        {
            if(chk[v[i].first][v[i].second] == 0) {all = true;break;}
        }
        if(!all)
        {
            printf("%d", ans);
            return 0;
        }
        memset(chk, 0, sizeof(chk));
        for(int i = 1;i <= n;i++)
        {
            for(int j = 1;j <= n;j++)
            {
                if(world[i][j] == 1 && !chk[i][j])
                {
                    for(int l = 0;l < 4;l++)
                    {
                        if(!world[i + dx[l]][j + dy[l]])
                        {
                            world[i + dx[l]][j + dy[l]] = 1;
                            chk[i + dx[l]][j + dy[l]] = 1;
                        }
                    }
                }
            }
        }
        ans++;
    }
}

Compilation message

civilization.cpp: In function 'int main()':
civilization.cpp:38:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = 1;i < v.size();i++)
                       ~~^~~~~~~~~~
civilization.cpp:25:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~~
civilization.cpp:28:14: 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 98 ms 16532 KB Output is correct
2 Correct 71 ms 16532 KB Output is correct
3 Correct 115 ms 16676 KB Output is correct
4 Correct 91 ms 16792 KB Output is correct
5 Correct 36 ms 16792 KB Output is correct
6 Correct 34 ms 16792 KB Output is correct
7 Correct 39 ms 16904 KB Output is correct
8 Correct 37 ms 16944 KB Output is correct
9 Correct 37 ms 16944 KB Output is correct
10 Correct 17 ms 16944 KB Output is correct
11 Correct 122 ms 17196 KB Output is correct
12 Correct 123 ms 17196 KB Output is correct

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 16532 KB Output is correct
2 Correct 71 ms 16532 KB Output is correct
3 Correct 115 ms 16676 KB Output is correct
4 Correct 91 ms 16792 KB Output is correct
5 Correct 36 ms 16792 KB Output is correct
6 Correct 34 ms 16792 KB Output is correct
7 Correct 39 ms 16904 KB Output is correct
8 Correct 37 ms 16944 KB Output is correct
9 Correct 37 ms 16944 KB Output is correct
10 Correct 17 ms 16944 KB Output is correct
11 Correct 122 ms 17196 KB Output is correct
12 Execution timed out 1069 ms 23008 KB Time limit exceeded
13 Halted 0 ms 0 KB -

Subtask #3
0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 98 ms 16532 KB Output is correct
2 Correct 71 ms 16532 KB Output is correct
3 Correct 115 ms 16676 KB Output is correct
4 Correct 91 ms 16792 KB Output is correct
5 Correct 36 ms 16792 KB Output is correct
6 Correct 34 ms 16792 KB Output is correct
7 Correct 39 ms 16904 KB Output is correct
8 Correct 37 ms 16944 KB Output is correct
9 Correct 37 ms 16944 KB Output is correct
10 Correct 17 ms 16944 KB Output is correct
11 Correct 122 ms 17196 KB Output is correct
12 Execution timed out 1069 ms 23008 KB Time limit exceeded
13 Halted 0 ms 0 KB -