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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#371004 | #6396. Puzzle: Kusabi | ricofx# | WA | 21ms | 16520kb | C++17 | 2.6kb | 2024-03-29 20:56:44 | 2024-03-29 20:56:50 |
Judging History
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);
}
}
Details
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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.