結果
問題 | No.1833 Subway Planning |
ユーザー | riano |
提出日時 | 2021-12-19 15:31:32 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,662 bytes |
コンパイル時間 | 1,894 ms |
コンパイル使用メモリ | 175,348 KB |
実行使用メモリ | 14,208 KB |
最終ジャッジ日時 | 2024-09-15 14:33:58 |
合計ジャッジ時間 | 5,168 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 | WA | - |
testcase_01 | WA | - |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | AC | 83 ms
14,080 KB |
testcase_12 | AC | 83 ms
14,080 KB |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | AC | 86 ms
14,080 KB |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | AC | 94 ms
14,080 KB |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
ソースコード
#include <bits/stdc++.h> using namespace std; #define ll long long #define rep(i,n) for(int i=0;i<n;i++) #define rrep(i,n) for(int i=n-1;i>=0;i--) #define rrep2(i,n,k) for(int i=n-1;i>=n-k;i--) #define vll(n,i) vector<long long>(n,i) #define v2ll(n,m,i) vector<vector<long long>>(n,vll(m,i)) #define v3ll(n,m,k,i) vector<vector<vector<long long>>>(n,v2ll(m,k,i)) #define v4ll(n,m,k,l,i) vector<vector<vector<vector<long long>>>>(n,v3ll(m,k,l,i)) #define all(v) v.begin(),v.end() #define chmin(k,m) k = min(k,m) #define chmax(k,m) k = max(k,m) #define Pr pair<ll,ll> #define Tp tuple<ll,ll,ll> #define riano_ std::ios::sync_with_stdio(false);std::cin.tie(nullptr) using Graph = vector<vector<Pr>>; const ll mod = 998244353; template<uint64_t mod> struct modint{ uint64_t val; constexpr modint(const int64_t val_=0) noexcept:val((val_%int64_t(mod)+int64_t(mod))%int64_t(mod)){} constexpr modint operator-() const noexcept{ return modint(*this)=mod-val; } constexpr modint operator+(const modint rhs) const noexcept{ return modint(*this)+=rhs; } constexpr modint operator-(const modint rhs) const noexcept{ return modint(*this)-=rhs; } constexpr modint operator*(const modint rhs) const noexcept{ return modint(*this)*=rhs; } constexpr modint operator/(const modint rhs) const noexcept{ return modint(*this)/=rhs; } constexpr modint &operator+=(const modint rhs) noexcept{ val+=rhs.val; val-=((val>=mod)?mod:0); return (*this); } constexpr modint &operator-=(const modint rhs) noexcept{ val+=((val<rhs.val)?mod:0); val-=rhs.val; return (*this); } constexpr modint &operator*=(const modint rhs) noexcept{ val=val*rhs.val%mod; return (*this); } constexpr modint &operator/=(modint rhs) noexcept{ uint64_t ex=mod-2; modint now=1; while(ex){ now*=((ex&1)?rhs:1); rhs*=rhs,ex>>=1; } return (*this)*=now; } modint & operator++(){ val++; if (val == mod) val = 0; return *this; } modint operator++(int){ modint<mod> res = *this; ++*this; return res; } constexpr bool operator==(const modint rhs) noexcept{ return val==rhs.val; } constexpr bool operator!=(const modint rhs) noexcept{ return val!=rhs.val; } friend constexpr ostream &operator<<(ostream& os,const modint x) noexcept{ return os<<(x.val); } friend constexpr istream &operator>>(istream& is,modint& x) noexcept{ uint64_t t; is>>t,x=t; return is; } }; typedef modint<mod> mint; mint pw(long long a,long long b,long long m = mod){ if(a%m==0) return mint(0); if(b==0) return mint(1); else if(b%2==0){ long long x = pw(a,b/2,m).val; return mint(x*x); } else{ long long x = pw(a,b-1,m).val; return mint(a*x); } } mint modinv(long long a, long long m = mod) { long long b = m, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v); } u %= m; return mint(u); } #define vm(n,i) vector<mint>(n,i) #define v2m(n,m,i) vector<vector<mint>>(n,vm(m,i)) #define v3m(n,m,k,i) vector<vector<vector<mint>>>(n,v2m(m,k,i)) #define v4m(n,m,k,l,i) vector<vector<vector<vector<mint>>>>(n,v3m(m,k,l,i)) //Unionfind //size>4e5 の時はvが足りなくなるので注意 struct unionfind { //自身が親であれば、その集合に属する頂点数に-1を掛けたもの //そうでなければ親のid vector<long long> r; vector<bool> lp; vector<long long> cnt; vector<long long> repr; vector<long long> per; unionfind(long long N,vector<long long> v=vector<long long>(4e5+2,0)) { //vで代表点の優先順位をinput r = vector<long long>(N, -1); lp = vector<bool>(N,false); cnt = vector<long long>(N, 0); repr = vector<long long>(N, -1); rep(i,N) repr[i] = i; per = v; } long long root(long long x) { if (r[x] < 0) return x; return r[x] = root(r[x]); } bool unite(long long x, long long y) { x = root(x); y = root(y); if (x == y){ lp[x] = true; return false; } long long tmp = 0; if (r[x] > r[y]) swap(x, y); tmp = repr[x]; if(per[repr[x]]>per[repr[y]]){ tmp = repr[y]; } r[x] += r[y]; cnt[x] += cnt[y]; r[y] = x; repr[x] = tmp; lp[x] = (lp[x]||lp[y]); return true; } long long size(long long x) { return max(-r[root(x)],0LL); } long long count(long long x){ return cnt[root(x)]; } long long represent(long long x){ return repr[root(x)]; } // 2つのデータx, yが属する木が同じならtrueを返す bool same(long long x, long long y) { long long rx = root(x); long long ry = root(y); return rx == ry; } //閉路の存在判定 bool loop(ll x){ return lp[root(x)]; } //重みをつける場合 void eval(ll i,ll x){ cnt[i] = x; } void eval_add(ll i,ll x = 1){ cnt[i] += x; } }; int main() { riano_; ll ans = 0; ll N; cin >> N; assert(2<=N&&N<=200000); //main関数内で unionfind uf(N); rep(i,N-1){ ll a,b,c; cin >> a >> b >> c; uf.unite(a-1,b-1); assert(1<=a&&a<=N); assert(1<=b&&b<=N); assert(1<=c&&c<=1000000000); chmax(ans,c); } assert(uf.size(0)==N); cout << ans << endl; }