oj.uz

Submission #96206

# Submission time Handle Problem Language Result Execution time Memory
96206 2019-02-07T04:04:34 Z JaeyunK None (KOI17_civilization) C++11
100 / 100
 930 ms 42640 KB 
#include <cstdio>
#include <queue>
#include <algorithm>
using namespace std;
class data{
public:
    int x, y, rk;
    data(){}
    data(int _x, int _y, int _r):x(_x),y(_y),rk(_r){}
};
int arr[2005][2005], rarr[2005][2005], par[100010], psz[100010], pos[2][4] = {{0, 0, 1, -1}, {1, -1, 0, 0}};
queue<data> que;
 
int getPar(int x){
    if(par[x] == x) return x;
    return par[x] = getPar(par[x]);
}
 
int main(){
    int n, k, a, b;
    scanf("%d %d", &n, &k);
    for(int i=1; i<=k; i++){
        scanf("%d %d", &a, &b);
        par[i] = i;
        psz[i] = 1;
        arr[a][b] = i;
        rarr[a][b] = 1;
        que.push({a, b, 1});
    }
    while(!que.empty()){
        int x = que.front().x, y = que.front().y, rk = que.front().rk;
        que.pop();
        for(int i=0; i<4; i++){
            int X = x+pos[0][i], Y = y+pos[1][i];
            if(X < 1 || X > n || Y < 1 || Y > n) continue;
            if(rarr[X][Y] == 0){
                arr[X][Y] = arr[x][y];
                rarr[X][Y] = rk+1;
                que.push({X, Y, rk+1});
            }else{
                int t = getPar(arr[X][Y]), p = getPar(arr[x][y]);
                if(t != p){
                    int sz = psz[t] + psz[p];
                    par[t] = p;
                    psz[p] += psz[t];
                    psz[t] = 0;
                    if(sz == k){
			long long ans = max(rarr[X][Y], rarr[x][y])-1;
                        printf("%lld", ans);
                        return 0;
                    }
                }
            }
        }
    }
    return 0;
}

Compilation message

civilization.cpp: In function 'int main()':
civilization.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~~
civilization.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1144 KB Output is correct
2 Correct 2 ms 888 KB Output is correct
3 Correct 3 ms 1144 KB Output is correct
4 Correct 3 ms 1144 KB Output is correct
5 Correct 3 ms 1272 KB Output is correct
6 Correct 3 ms 1272 KB Output is correct
7 Correct 2 ms 1272 KB Output is correct
8 Correct 2 ms 1272 KB Output is correct
9 Correct 3 ms 1272 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 1144 KB Output is correct
12 Correct 3 ms 1272 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1144 KB Output is correct
2 Correct 2 ms 888 KB Output is correct
3 Correct 3 ms 1144 KB Output is correct
4 Correct 3 ms 1144 KB Output is correct
5 Correct 3 ms 1272 KB Output is correct
6 Correct 3 ms 1272 KB Output is correct
7 Correct 2 ms 1272 KB Output is correct
8 Correct 2 ms 1272 KB Output is correct
9 Correct 3 ms 1272 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 1144 KB Output is correct
12 Correct 57 ms 15780 KB Output is correct
13 Correct 41 ms 14200 KB Output is correct
14 Correct 52 ms 15068 KB Output is correct
15 Correct 40 ms 13016 KB Output is correct
16 Correct 8 ms 4216 KB Output is correct
17 Correct 206 ms 21800 KB Output is correct
18 Correct 216 ms 21872 KB Output is correct
19 Correct 193 ms 21880 KB Output is correct
20 Correct 181 ms 21752 KB Output is correct
21 Correct 219 ms 21856 KB Output is correct
22 Correct 3 ms 508 KB Output is correct
23 Correct 43 ms 16124 KB Output is correct
24 Correct 3 ms 1272 KB Output is correct

Subtask #3
46.0 / 46.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1144 KB Output is correct
2 Correct 2 ms 888 KB Output is correct
3 Correct 3 ms 1144 KB Output is correct
4 Correct 3 ms 1144 KB Output is correct
5 Correct 3 ms 1272 KB Output is correct
6 Correct 3 ms 1272 KB Output is correct
7 Correct 2 ms 1272 KB Output is correct
8 Correct 2 ms 1272 KB Output is correct
9 Correct 3 ms 1272 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 1144 KB Output is correct
12 Correct 57 ms 15780 KB Output is correct
13 Correct 41 ms 14200 KB Output is correct
14 Correct 52 ms 15068 KB Output is correct
15 Correct 40 ms 13016 KB Output is correct
16 Correct 8 ms 4216 KB Output is correct
17 Correct 206 ms 21800 KB Output is correct
18 Correct 216 ms 21872 KB Output is correct
19 Correct 193 ms 21880 KB Output is correct
20 Correct 181 ms 21752 KB Output is correct
21 Correct 219 ms 21856 KB Output is correct
22 Correct 3 ms 508 KB Output is correct
23 Correct 43 ms 16124 KB Output is correct
24 Correct 149 ms 30840 KB Output is correct
25 Correct 204 ms 31792 KB Output is correct
26 Correct 123 ms 22392 KB Output is correct
27 Correct 143 ms 31224 KB Output is correct
28 Correct 93 ms 20464 KB Output is correct
29 Correct 789 ms 39264 KB Output is correct
30 Correct 550 ms 34808 KB Output is correct
31 Correct 895 ms 42640 KB Output is correct
32 Correct 930 ms 42508 KB Output is correct
33 Correct 838 ms 42632 KB Output is correct
34 Correct 147 ms 31732 KB Output is correct
35 Correct 2 ms 376 KB Output is correct
36 Correct 3 ms 1272 KB Output is correct