Submission #1591124
Source Code Expand
#include <bits/stdc++.h> #define N 300010 using namespace std; inline int read() { int x=0,f=1; char ch=getchar(); while(ch<'0'||ch>'9'){if(ch=='-')f=-1; ch=getchar();} while(ch>='0'&&ch<='9'){x=x*10+ch-'0'; ch=getchar();} return x*f; } struct edge { int v,next; }vs[N<<1]; int n,st[N],ee,fa[N],size[N]; map <int,int> Ms[N]; inline int getfa(int x) { return fa[x]==x? x: fa[x]=getfa(fa[x]); } int main() { queue <int> q; while(!q.empty()) q.pop(); n=read(); for(int i=1;i<n+n-1;i++) { int u=read(), v=read(); Ms[u][v]++; Ms[v][u]++; size[u]++; size[v]++; q.push(u); q.push(v); } for(int i=1;i<=n;i++) fa[i]=i; while(!q.empty()) { int x=q.front(); q.pop(); int y=q.front(); q.pop(); x=getfa(x); y=getfa(y); if(Ms[x][y]<2) continue; // cerr << x << " " << y << " " << endl; if(size[x]<size[y]) swap(x,y); // cout << "merge:" << x << " " << y << endl; for(map<int,int> :: iterator it=Ms[y].begin();it!=Ms[y].end();it++) { int d=(*it).second,z=(*it).first; Ms[y][z]=0; Ms[z][y]=0; if(z==x) continue; Ms[z][x]+=d; Ms[x][z]+=d; q.push(x); q.push(z); } /*for(int i=1;i<=n;i++) { for(int j=1;j<=n;j++) printf("%d ",Ms[i][j]); printf("\n"); } cout << endl;*/ fa[y]=x; } //for(int i=1;i<=n;i++) cout << fa[i] << " "; cout << endl; for(int i=1;i<=n;i++) if(fa[1]!=fa[i]) {puts("NO"); return 0;} puts("YES"); return 0; }
Submission Info
Submission Time | |
---|---|
Task | E - Blue and Red Tree |
User | wcz111 |
Language | C++14 (GCC 5.4.1) |
Score | 1400 |
Code Size | 1459 Byte |
Status | AC |
Exec Time | 679 ms |
Memory | 81408 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1400 / 1400 | ||||
Status |
|
|
Set Name | Test Cases |
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Sample | sample1.txt, sample2.txt, sample3.txt |
All | sample1.txt, sample2.txt, sample3.txt, in1.txt, in10.txt, in11.txt, in12.txt, in13.txt, in14.txt, in15.txt, in16.txt, in17.txt, in18.txt, in19.txt, in2.txt, in20.txt, in21.txt, in22.txt, in23.txt, in24.txt, in25.txt, in26.txt, in27.txt, in28.txt, in29.txt, in3.txt, in30.txt, in31.txt, in32.txt, in33.txt, in34.txt, in35.txt, in36.txt, in37.txt, in38.txt, in39.txt, in4.txt, in40.txt, in41.txt, in42.txt, in43.txt, in44.txt, in45.txt, in46.txt, in47.txt, in5.txt, in6.txt, in7.txt, in8.txt, in9.txt, sample1.txt, sample2.txt, sample3.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
in1.txt | AC | 7 ms | 18688 KB |
in10.txt | AC | 115 ms | 39040 KB |
in11.txt | AC | 560 ms | 68352 KB |
in12.txt | AC | 588 ms | 74112 KB |
in13.txt | AC | 571 ms | 72064 KB |
in14.txt | AC | 632 ms | 69632 KB |
in15.txt | AC | 679 ms | 75648 KB |
in16.txt | AC | 567 ms | 71296 KB |
in17.txt | AC | 574 ms | 72576 KB |
in18.txt | AC | 588 ms | 74240 KB |
in19.txt | AC | 647 ms | 81408 KB |
in2.txt | AC | 7 ms | 18688 KB |
in20.txt | AC | 559 ms | 70784 KB |
in21.txt | AC | 617 ms | 71552 KB |
in22.txt | AC | 548 ms | 67968 KB |
in23.txt | AC | 524 ms | 63104 KB |
in24.txt | AC | 567 ms | 65920 KB |
in25.txt | AC | 591 ms | 70656 KB |
in26.txt | AC | 574 ms | 69632 KB |
in27.txt | AC | 544 ms | 65152 KB |
in28.txt | AC | 571 ms | 69248 KB |
in29.txt | AC | 559 ms | 64512 KB |
in3.txt | AC | 7 ms | 18688 KB |
in30.txt | AC | 544 ms | 64512 KB |
in31.txt | AC | 373 ms | 50176 KB |
in32.txt | AC | 370 ms | 50176 KB |
in33.txt | AC | 369 ms | 50048 KB |
in34.txt | AC | 398 ms | 50176 KB |
in35.txt | AC | 375 ms | 51840 KB |
in36.txt | AC | 368 ms | 50048 KB |
in37.txt | AC | 376 ms | 50048 KB |
in38.txt | AC | 357 ms | 50048 KB |
in39.txt | AC | 350 ms | 50176 KB |
in4.txt | AC | 118 ms | 39040 KB |
in40.txt | AC | 349 ms | 50176 KB |
in41.txt | AC | 369 ms | 50176 KB |
in42.txt | AC | 364 ms | 50048 KB |
in43.txt | AC | 368 ms | 50432 KB |
in44.txt | AC | 364 ms | 50176 KB |
in45.txt | AC | 359 ms | 50048 KB |
in46.txt | AC | 349 ms | 50048 KB |
in47.txt | AC | 355 ms | 50176 KB |
in5.txt | AC | 123 ms | 39040 KB |
in6.txt | AC | 349 ms | 50176 KB |
in7.txt | AC | 116 ms | 39040 KB |
in8.txt | AC | 120 ms | 39040 KB |
in9.txt | AC | 119 ms | 39040 KB |
sample1.txt | AC | 7 ms | 18688 KB |
sample2.txt | AC | 7 ms | 18688 KB |
sample3.txt | AC | 7 ms | 18688 KB |