結果
問題 | No.1833 Subway Planning |
ユーザー | blackyuki |
提出日時 | 2022-02-04 21:45:12 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,376 bytes |
コンパイル時間 | 2,564 ms |
コンパイル使用メモリ | 215,220 KB |
実行使用メモリ | 41,652 KB |
最終ジャッジ日時 | 2024-06-11 11:39:57 |
合計ジャッジ時間 | 28,124 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 481 ms
32,896 KB |
testcase_05 | AC | 680 ms
32,896 KB |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | AC | 1,134 ms
32,896 KB |
testcase_10 | AC | 1,180 ms
34,540 KB |
testcase_11 | AC | 1,266 ms
33,828 KB |
testcase_12 | AC | 1,296 ms
32,988 KB |
testcase_13 | AC | 1,282 ms
34,536 KB |
testcase_14 | AC | 748 ms
36,052 KB |
testcase_15 | AC | 1,148 ms
35,328 KB |
testcase_16 | AC | 2,019 ms
41,652 KB |
testcase_17 | AC | 2,254 ms
39,268 KB |
testcase_18 | AC | 2,027 ms
37,056 KB |
testcase_19 | AC | 1,411 ms
34,688 KB |
testcase_20 | WA | - |
testcase_21 | AC | 1,146 ms
33,736 KB |
testcase_22 | AC | 1,060 ms
33,176 KB |
testcase_23 | AC | 2 ms
5,376 KB |
testcase_24 | AC | 2 ms
5,376 KB |
testcase_25 | AC | 2 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define rep(i, n) for(long long i=0;i<(long long)(n);i++) #define REP(i,k,n) for(long long i=k;i<(long long)(n);i++) #define pb emplace_back #define lb(v,k) (lower_bound(all(v),(k))-v.begin()) #define ub(v,k) (upper_bound(all(v),(k))-v.begin()) #define fi first #define se second #define pi M_PI #define PQ(T) priority_queue<T> #define SPQ(T) priority_queue<T,vector<T>,greater<T>> #define dame(a) {out(a);return 0;} #define decimal cout<<fixed<<setprecision(15); #define all(a) a.begin(),a.end() #define rsort(a) {sort(all(a));reverse(all(a));} #define dupli(a) {sort(all(a));a.erase(unique(all(a)),a.end());} #define popcnt __builtin_popcountll typedef long long ll; typedef pair<ll,ll> P; typedef tuple<ll,ll,ll> PP; typedef tuple<ll,ll,ll,ll> PPP; using vi=vector<ll>; using vvi=vector<vi>; using vvvi=vector<vvi>; using vvvvi=vector<vvvi>; using vp=vector<P>; using vvp=vector<vp>; using vb=vector<bool>; using vvb=vector<vb>; const ll inf=1001001001001001001; const ll INF=1001001001; const ll mod=1000000007; const double eps=1e-10; template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;} template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;} template<class T> void out(T a){cout<<a<<'\n';} template<class T> void outp(T a){cout<<'('<<a.fi<<','<<a.se<<')'<<'\n';} template<class T> void outvp(T v){rep(i,v.size())cout<<'('<<v[i].fi<<','<<v[i].se<<')';cout<<'\n';} template<class T> void outvvp(T v){rep(i,v.size())outvp(v[i]);} template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<'\n';} template<class T> void outvv(T v){rep(i,v.size())outv(v[i]);} template<class T> bool isin(T x,T l,T r){return (l)<=(x)&&(x)<=(r);} template<class T> void yesno(T b){if(b)out("yes");else out("no");} template<class T> void YesNo(T b){if(b)out("Yes");else out("No");} template<class T> void YESNO(T b){if(b)out("YES");else out("NO");} template<class T> void outset(T s){auto itr=s.begin();while(itr!=s.end()){if(itr!=s.begin())cout<<' ';cout<<*itr;itr++;}cout<<'\n';} void outs(ll a,ll b){if(a>=inf-100)out(b);else out(a);} ll gcd(ll a,ll b){if(b==0)return a;return gcd(b,a%b);} ll modpow(ll a,ll b){ll res=1;a%=mod;while(b){if(b&1)res=res*a%mod;a=a*a%mod;b>>=1;}return res;} int main(){ ll n;cin>>n; vvp g_(n); ll ma=0; rep(i,n-1){ ll a,b,c;cin>>a>>b>>c;a--;b--; g_[a].pb(b,c);g_[b].pb(a,c); chmax(ma,c); } ll ok=ma,ng=-1; while(ok-ng>1){ vvp g=g_; ll md=(ok+ng)/2; ll dif=ma-md; vb use(n,false); rep(i,n)for(auto x:g[i])if(x.se>md){ use[i]=true;use[x.fi]=true; } vi cnt(n); rep(i,n)cnt[i]=g[i].size(); queue<ll> que; rep(i,n)if(!use[i]&&cnt[i]==1){ cnt[i]=-1; que.push(i); } while(!que.empty()){ ll t=que.front();que.pop(); for(auto x:g[t])if(cnt[x.fi]!=-1){ cnt[x.fi]--; if(!use[x.fi]&&cnt[x.fi]==1){ cnt[x.fi]=-1; que.push(x.fi); } } } bool able=true; rep(i,n)if(use[i])for(auto x:g[i])if(use[x.fi]&&x.se<dif)able=false; rep(i,n)if(cnt[i]>2)able=false; if(able)ok=md; else ng=md; } out(ok); }