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Submission #30680

# Submission time Handle Problem Language Result Execution time Memory
30680 2017-07-26T06:00:57 Z zoomswk Bosses (BOI16_bosses) C++14
100 / 100
 1036 ms 2244 KB 
#include <stdio.h>
#include <vector>
#include <queue>
using namespace std;

vector<int> way[5005];
int par[5005], deg[5005];
int val[5005];

int main(){
    int n;
    scanf("%d", &n);
    for(int i=1; i<=n; i++){
        int k;
        scanf("%d", &k);
        while(k--){
            int x;
            scanf("%d", &x);
            way[x].push_back(i);
        }
    }
    int res = 1e9;
    for(int root=1; root<=n; root++){
        queue<int> q;
        q.push(root);
        for(int i=1; i<=n; i++) par[i] = 0, deg[i] = 0, val[i] = 1;
        par[root] = root;
        while(!q.empty()){
            int pos = q.front();
            q.pop();
            for(int v : way[pos]) if(!par[v]){
                q.push(v);
                par[v] = pos;
                deg[pos]++;
            }
        }
        int valid = 1;
        for(int i=1; i<=n; i++){
            if(!par[i]){ valid = 0; break; }
        }
        if(!valid) continue;
        for(int i=1; i<=n; i++) if(deg[i] == 0) q.push(i);
        int cur = 0;
        while(!q.empty()){
            int pos = q.front();
            q.pop();
            cur += val[pos];
            val[par[pos]] += val[pos];
            deg[par[pos]]--;
            if(deg[par[pos]] == 0) q.push(par[pos]);
        }
        if(cur < res) res = cur;
    }
    printf("%d", res);
    return 0;
}

Compilation message

bosses.cpp: In function 'int main()':
bosses.cpp:12:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
                    ^
bosses.cpp:15:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &k);
                        ^
bosses.cpp:18:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &x);
                            ^

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2112 KB Output is correct
2 Correct 0 ms 2112 KB Output is correct
3 Correct 0 ms 2112 KB Output is correct
4 Correct 0 ms 2112 KB Output is correct
5 Correct 0 ms 2112 KB Output is correct
6 Correct 0 ms 2112 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2112 KB Output is correct
2 Correct 0 ms 2112 KB Output is correct
3 Correct 0 ms 2112 KB Output is correct
4 Correct 0 ms 2112 KB Output is correct
5 Correct 0 ms 2112 KB Output is correct
6 Correct 0 ms 2112 KB Output is correct
7 Correct 0 ms 2112 KB Output is correct
8 Correct 0 ms 2112 KB Output is correct
9 Correct 0 ms 2112 KB Output is correct
10 Correct 0 ms 2112 KB Output is correct
11 Correct 0 ms 2112 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2112 KB Output is correct
2 Correct 0 ms 2112 KB Output is correct
3 Correct 0 ms 2112 KB Output is correct
4 Correct 0 ms 2112 KB Output is correct
5 Correct 0 ms 2112 KB Output is correct
6 Correct 0 ms 2112 KB Output is correct
7 Correct 0 ms 2112 KB Output is correct
8 Correct 0 ms 2112 KB Output is correct
9 Correct 0 ms 2112 KB Output is correct
10 Correct 0 ms 2112 KB Output is correct
11 Correct 0 ms 2112 KB Output is correct
12 Correct 3 ms 2244 KB Output is correct
13 Correct 3 ms 2244 KB Output is correct
14 Correct 166 ms 2244 KB Output is correct
15 Correct 49 ms 2244 KB Output is correct
16 Correct 653 ms 2244 KB Output is correct
17 Correct 993 ms 2244 KB Output is correct
18 Correct 1036 ms 2244 KB Output is correct