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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#63906#3996. RaceltunjicWA 3ms17068kbC++141.7kb2022-11-23 16:48:082022-11-23 16:48:12

Judging History

This is the latest submission verdict.

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2022-11-23 16:48:12]
  • Judged
  • Verdict: WA
  • Time: 3ms
  • Memory: 17068kb
  • [2022-11-23 16:48:08]
  • Submitted

answer

#include <bits/stdc++.h> 

#define X first
#define Y second
#define pb push_back

using namespace std; 

typedef pair<int, int> pii;

const int N = 2e5 + 10;
const int LOG = 30;

int n, m, q, k, dep[N], xr[N], base[N], comp[N];
int ans[N];
pii task[N];

vector<pii> g[N];
vector<int> space, t[N];

bool add(int x, bool flag){
	while(x && base[__lg(x)] != -1){
		x ^= space[base[__lg(x)]];
	}  
	if(flag && x){
		base[__lg(x)] = space.size();
		space.pb(x);
	}
	return x == 0;
}

void dfs(int u, int c){
	comp[u] = c;
	for(pii e : g[u]){
		int v = e.X, val = e.Y;
		if(comp[v]){
			continue;
		}
		dep[v] = dep[u] + 1;
		xr[v] = xr[u] ^ (1 << val);
		dfs(v, c);
	}
}

void solve(int u){
	for(pii e : g[u]){
		int v = e.X, val = e.Y;
		if(dep[v] <= dep[u]){
			bool res = add(xr[u] ^ xr[v] ^ (1 << val), true);
			continue;
		} else if(dep[v] == dep[u] + 1)
			solve(v);
	}
}

int main(){
	memset(base, -1, sizeof(base));
	scanf("%d%d%d%d", &n, &m, &k, &q);
	for(int i = 0; i < m; i++){
		int u, v, val;
		scanf("%d%d%d", &u, &v, &val);
		g[u].pb({v, val - 1});
		g[v].pb({u, val - 1});
	}
	for(int i = 1; i <= n; i++){
		if(comp[i]) continue;
		dfs(i, i);
	}
	for(int i = 0; i < q; i++){
		int u, v;
		scanf("%d%d", &u, &v);
		task[i] = {u, v};
		if(comp[u] == comp[v]){
			t[comp[u]].pb(i);
		}	
	}
	for(int i = 1; i <= n; i++){
		if(t[i].empty()) continue; 
		memset(base, -1, sizeof(base));
		solve(i);
		for(int ind : t[i]){
			int u = task[ind].X;
			int v = task[ind].Y;
			int val = xr[u] ^ xr[v];
			if(add(val, false) || add(((1 << k) - 1) ^ val, false)) ans[ind] = true;
		} 
	}
	for(int i = 0; i < q; i++){
		printf(ans[i] ? "Yes\n" : "No\n");
	}
	return 0;
}

詳細信息

Test #1:

score: 100
Accepted
time: 3ms
memory: 17068kb

input:

7 9 3 4
1 2 1
2 3 1
3 1 2
1 4 3
5 6 2
6 7 1
6 7 3
7 7 2
5 5 1
6 7
1 4
2 4
2 5

output:

Yes
No
Yes
No

result:

ok 4 token(s): yes count is 2, no count is 2

Test #2:

score: 0
Accepted
time: 2ms
memory: 15616kb

input:

9 10 3 5
7 2 2
4 2 1
7 1 1
2 8 1
1 7 2
2 7 3
2 8 1
7 2 1
7 5 1
8 1 2
6 4
6 7
8 4
5 1
8 6

output:

No
No
Yes
Yes
No

result:

ok 5 token(s): yes count is 2, no count is 3

Test #3:

score: -100
Wrong Answer
time: 3ms
memory: 16772kb

input:

39 30 5 999
12 22 4
11 1 1
28 13 3
35 1 4
7 17 2
20 19 4
28 7 5
15 33 5
31 38 5
13 33 4
13 35 2
16 12 5
13 33 1
21 15 3
23 32 1
19 16 3
3 22 3
11 14 2
31 26 5
32 17 5
34 17 3
31 26 2
10 37 1
1 3 1
30 12 4
1 35 3
6 1 2
25 15 2
39 23 5
10 5 3
24 34
32 27
4 13
37 28
31 36
12 11
24 6
22 32
7 17
1 15
22 ...

output:

No
No
No
No
No
Yes
No
Yes
No
No
No
No
Yes
No
No
No
Yes
No
No
No
No
No
No
No
No
No
No
Yes
No
Yes
No
Yes
Yes
Yes
No
No
No
Yes
No
No
No
No
No
Yes
No
Yes
Yes
No
No
No
No
No
Yes
No
Yes
No
No
No
No
No
No
No
No
No
Yes
No
No
No
No
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
N...

result:

wrong answer expected NO, found YES [496th token]