QOJ.ac

QOJ

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
#371004#6396. Puzzle: Kusabiricofx#WA 21ms16520kbC++172.6kb2024-03-29 20:56:442024-03-29 20:56:50

Judging History

你现在查看的是最新测评结果

  • [2024-03-29 20:56:50]
  • 评测
  • 测评结果:WA
  • 用时:21ms
  • 内存:16520kb
  • [2024-03-29 20:56:44]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
#define enl putchar('\n')
const int MAXN = 1e5+5;
typedef pair<int,int> pii;
int n,m;
string s;
struct EG{
    int to,nxt;
}e[MAXN];
int head[MAXN],etot;
inline void add(int u,int v){
    e[etot]={v,head[u]};
    head[u]=etot++;
}
// vector<int>f[MAXN][3];
struct FFF{
    vector<int>v;
    priority_queue<int>q1,q2;
}f[MAXN];
int fa[MAXN],dep[MAXN];
vector<pii>ans;

bool bfs(){
    vector<int>vec;
    queue<int>q;
    q.push(1);
    while(!q.empty()){
        int u=q.front();q.pop();
        vec.push_back(u);
        for(int i=head[u];~i;i=e[i].nxt){
            q.push(e[i].to);
            dep[e[i].to] = dep[u]+1;
        }
    }
    reverse(vec.begin(),vec.end());
    for(int u:vec){
        // printf("%d %d %d\n",f[u][0].size(),f[u][1].size(),f[u][2].size());
        // if((f[u][1].size()>1)||(f[u][2].size()>1)||f[u][0].size() && (f[u][1].size() || f[u][2].size()))
        // printf("%d %d %d\n",u,f[u].q1.size(),f[u].q2.size());
        while(!f[u].q1.empty() && !f[u].q2.empty()){
            int x=f[u].q1.top(),y=f[u].q2.top();
            f[u].q1.pop();f[u].q2.pop();
            if(dep[x]>=dep[y])return !printf("NO\n");
            ans.push_back({x,y});
        }
        if(f[u].v.size()+f[u].q1.size()+f[u].q2.size() > 1)
            return !printf("NO\n");
        // for(int i=0;i < 3;++i)
        //     if(!f[u][i].empty())
        //         f[fa[u]][i].push_back(f[u][i][0]);
        if(!f[u].v.empty())f[fa[u]].v.push_back(f[u].v[0]);
        if(!f[u].q1.empty())f[fa[u]].q1.push(f[u].q1.top());
        if(!f[u].q2.empty())f[fa[u]].q2.push(f[u].q2.top());
        if(f[fa[u]].v.size() == 2){
            int x=f[fa[u]].v.back();f[fa[u]].v.pop_back();
            int y=f[fa[u]].v.back();f[fa[u]].v.pop_back();
            ans.push_back({x,y});
        }
    }
    if(f[1].v.size()||f[1].q1.size()||f[1].q2.size())
        return !printf("NO\n");
    return true;
}

int main() {
    ios::sync_with_stdio(0);cin.tie(0);
    memset(head,-1,sizeof(head));
    cin>>n;
    for(int i=1;i<n;++i){
        int u,v;
        cin>>u>>v>>s;
        fa[u]=v;
        add(v,u);
        if(s=="Tong")f[u].v.push_back(u);
        else if(s=="Duan")f[u].q1.push(u);
        else if(s=="Chang")f[u].q2.push(u);
    }
    // for(int i=1;i<=n;++i,enl)
    //     for(int j=0;j<3;++j)
    //         // if(!f[i][j].empty())
    //             printf("%d ",f[i][j].size());
    if(bfs()){
        printf("YES\n");
        for(auto [x,y]:ans)
            printf("%d %d\n",x,y);
    }
}

詳細信息

Test #1:

score: 100
Accepted
time: 3ms
memory: 13108kb

input:

8
2 1 -
3 1 -
4 2 Tong
5 2 Tong
6 3 Duan
7 3 -
8 7 Chang

output:

YES
5 4
6 8

result:

ok Correct.

Test #2:

score: 0
Accepted
time: 2ms
memory: 12740kb

input:

10
2 1 Duan
3 2 Duan
4 2 -
5 4 Chang
6 2 Chang
7 1 Duan
8 6 Tong
9 6 Tong
10 3 Chang

output:

YES
9 8
3 10
2 6
7 5

result:

ok Correct.

Test #3:

score: 0
Accepted
time: 0ms
memory: 12568kb

input:

2
2 1 Tong

output:

NO

result:

ok Correct.

Test #4:

score: -100
Wrong Answer
time: 21ms
memory: 16520kb

input:

100000
2 1 Duan
3 1 Duan
4 3 -
5 4 Duan
6 3 -
7 4 Duan
8 4 -
9 8 -
10 7 Duan
11 9 -
12 7 Duan
13 7 Duan
14 8 Duan
15 13 -
16 10 Duan
17 11 Duan
18 12 -
19 1 Duan
20 5 Duan
21 4 Duan
22 14 Duan
23 16 -
24 22 Duan
25 16 Duan
26 13 -
27 13 -
28 17 -
29 5 Duan
30 22 -
31 23 -
32 9 Duan
33 5 -
34 30 Duan...

output:

NO

result:

wrong answer Jury has answer but participant has not.