Submission #2213872
Source Code Expand
#include<bits/stdc++.h> using namespace std; #define int long long #define rep(i,n) for(int i=0;i<(n);i++) #define pb push_back #define all(v) (v).begin(),(v).end() #define fi first #define se second typedef vector<int>vint; typedef pair<int,int>pint; typedef vector<pint>vpint; template<typename A,typename B>inline void chmin(A &a,B b){if(a>b)a=b;} template<typename A,typename B>inline void chmax(A &a,B b){if(a<b)a=b;} int N; set<int>G[111111],H[111111]; int par[111111]; int find(int x){ return x==par[x]?x:par[x]=find(par[x]); } signed main(){ scanf("%lld",&N); rep(i,N-1){ int a,b; scanf("%lld%lld",&a,&b); a--;b--; G[a].insert(b); G[b].insert(a); } queue<pint>que; rep(i,N-1){ int c,d; scanf("%lld%lld",&c,&d); c--;d--; H[c].insert(d); H[d].insert(c); if(G[c].find(d)!=G[c].end())que.push({c,d}); } rep(i,N)par[i]=i; rep(i,N-1){ if(que.size()==0){ cout<<"NO"<<endl; return 0; } int u,v; tie(u,v)=que.front(); que.pop(); u=find(u); v=find(v); if(G[u].size()+H[u].size()>G[v].size()+H[v].size())swap(u,v); for(auto a:G[u]){ if(H[v].find(a)!=H[v].end()){ que.push({v,a}); } } for(auto a:H[u]){ if(G[v].find(a)!=G[v].end()){ que.push({v,a}); } } G[u].erase(v);G[v].erase(u); H[u].erase(v);H[v].erase(u); for(auto a:G[u]){ G[a].erase(u); G[a].insert(v); G[v].insert(a); } for(auto a:H[u]){ H[a].erase(u); H[a].insert(v); H[v].insert(a); } par[u]=v; } cout<<"YES"<<endl; return 0; }
Submission Info
Submission Time | |
---|---|
Task | E - Blue and Red Tree |
User | latte0119 |
Language | C++14 (GCC 5.4.1) |
Score | 1400 |
Code Size | 1965 Byte |
Status | AC |
Exec Time | 355 ms |
Memory | 30848 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:28:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&N); ^ ./Main.cpp:31:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&a,&b); ^ ./Main.cpp:41:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld",&c,&d); ^
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 1400 / 1400 | ||||
Status |
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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 | 5 ms | 10624 KB |
in10.txt | AC | 106 ms | 30208 KB |
in11.txt | AC | 228 ms | 30848 KB |
in12.txt | AC | 227 ms | 30848 KB |
in13.txt | AC | 218 ms | 30848 KB |
in14.txt | AC | 217 ms | 30848 KB |
in15.txt | AC | 219 ms | 30848 KB |
in16.txt | AC | 225 ms | 30848 KB |
in17.txt | AC | 218 ms | 30848 KB |
in18.txt | AC | 219 ms | 30848 KB |
in19.txt | AC | 224 ms | 30848 KB |
in2.txt | AC | 5 ms | 10624 KB |
in20.txt | AC | 232 ms | 30848 KB |
in21.txt | AC | 215 ms | 30720 KB |
in22.txt | AC | 214 ms | 30720 KB |
in23.txt | AC | 220 ms | 30720 KB |
in24.txt | AC | 223 ms | 30720 KB |
in25.txt | AC | 220 ms | 30720 KB |
in26.txt | AC | 219 ms | 30848 KB |
in27.txt | AC | 242 ms | 30848 KB |
in28.txt | AC | 231 ms | 30848 KB |
in29.txt | AC | 230 ms | 30848 KB |
in3.txt | AC | 5 ms | 10624 KB |
in30.txt | AC | 222 ms | 30848 KB |
in31.txt | AC | 329 ms | 30464 KB |
in32.txt | AC | 330 ms | 30464 KB |
in33.txt | AC | 334 ms | 30464 KB |
in34.txt | AC | 355 ms | 30464 KB |
in35.txt | AC | 330 ms | 30464 KB |
in36.txt | AC | 327 ms | 30464 KB |
in37.txt | AC | 323 ms | 30464 KB |
in38.txt | AC | 245 ms | 30464 KB |
in39.txt | AC | 235 ms | 30464 KB |
in4.txt | AC | 107 ms | 30208 KB |
in40.txt | AC | 267 ms | 30464 KB |
in41.txt | AC | 322 ms | 30464 KB |
in42.txt | AC | 328 ms | 30464 KB |
in43.txt | AC | 332 ms | 30464 KB |
in44.txt | AC | 332 ms | 30464 KB |
in45.txt | AC | 352 ms | 30464 KB |
in46.txt | AC | 254 ms | 30464 KB |
in47.txt | AC | 253 ms | 30464 KB |
in5.txt | AC | 109 ms | 30208 KB |
in6.txt | AC | 241 ms | 30464 KB |
in7.txt | AC | 124 ms | 30208 KB |
in8.txt | AC | 130 ms | 30208 KB |
in9.txt | AC | 135 ms | 30208 KB |
sample1.txt | AC | 5 ms | 10624 KB |
sample2.txt | AC | 5 ms | 10624 KB |
sample3.txt | AC | 5 ms | 10624 KB |