oj.uz

Submission #39775

# Submission time Handle Problem Language Result Execution time Memory
39775 2018-01-18T13:06:25 Z nonocut Bosses (BOI16_bosses) C++14
0 / 100
 0 ms 2316 KB 
#include<bits/stdc++.h>
using namespace std;

#define ll long long
const int maxn = 5e3 + 5;

int n;
int vis[maxn];
long long val[maxn];
vector<int> way[maxn], p[maxn];
queue<int> q;

void dfs(int u) {
	for(auto v : p[u]) dfs(v), val[u] += val[v];
	val[u]++;
}

ll bfs(int u) {
    int i;
	memset(vis,0,sizeof(vis));
	memset(val,0,sizeof(val));
	for(i=1;i<=n;i++) p[i].clear();

	vis[u] = 1;
	q.push(u);
	while(!q.empty()) {
		int x = q.front(); q.pop();
		for(auto y : way[x]) {
			if(!vis[y]) {
				vis[y] = 1;
				p[x].push_back(y);
				q.push(y);
			}
		}
	}

	dfs(u);
	long long ans = 0;
	for(i=1;i<=n;i++) ans += val[i];
	return ans;
}
int main() {
	int i,x,k;

	scanf("%d",&n);
	for(i=1;i<=n;i++) {
		scanf("%d",&k);
		while(k--) {
			scanf("%d",&x);
			way[x].push_back(i);
		}
	}

	ll ans = (long long)1e18;
	for(i=1;i<=n;i++) ans = min(ans, bfs(i));
	printf("%lld",ans);
}

Compilation message

bosses.cpp: In function 'int main()':
bosses.cpp:45:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
bosses.cpp:47:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&k);
                 ^
bosses.cpp:49:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&x);
                  ^

Subtask #1
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2316 KB Output is correct
2 Correct 0 ms 2316 KB Output is correct
3 Incorrect 0 ms 2316 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2316 KB Output is correct
2 Correct 0 ms 2316 KB Output is correct
3 Incorrect 0 ms 2316 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 2316 KB Output is correct
2 Correct 0 ms 2316 KB Output is correct
3 Incorrect 0 ms 2316 KB Output isn't correct
4 Halted 0 ms 0 KB -