#709839 (C++14) No.1718 Random Squirrel

提出ソース

結果

問題	No.1718 Random Squirrel
ユーザー	riano
提出日時	2021-10-22 23:27:51
言語	C++14 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	177 ms / 2,000 ms
コード長	6,215 bytes
コンパイル時間	2,013 ms
コンパイル使用メモリ	188,016 KB
実行使用メモリ	40,720 KB
最終ジャッジ日時	2024-09-23 08:01:02
合計ジャッジ時間	5,374 ms
ジャッジサーバーID （参考情報）	judge1 / judge3

このコードへのチャレンジ
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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 6,816 KB
testcase_01	AC	2 ms 6,944 KB
testcase_02	AC	2 ms 6,940 KB
testcase_03	AC	3 ms 6,948 KB
testcase_04	AC	3 ms 6,940 KB
testcase_05	AC	2 ms 6,944 KB
testcase_06	AC	2 ms 6,940 KB
testcase_07	AC	3 ms 6,940 KB
testcase_08	AC	2 ms 6,940 KB
testcase_09	AC	2 ms 6,944 KB
testcase_10	AC	2 ms 6,944 KB
testcase_11	AC	59 ms 20,256 KB
testcase_12	AC	16 ms 7,808 KB
testcase_13	AC	50 ms 15,304 KB
testcase_14	AC	66 ms 20,804 KB
testcase_15	AC	88 ms 21,240 KB
testcase_16	AC	38 ms 12,024 KB
testcase_17	AC	58 ms 19,352 KB
testcase_18	AC	132 ms 27,276 KB
testcase_19	AC	85 ms 20,320 KB
testcase_20	AC	21 ms 10,000 KB
testcase_21	AC	100 ms 27,124 KB
testcase_22	AC	173 ms 32,248 KB
testcase_23	AC	108 ms 27,636 KB
testcase_24	AC	94 ms 27,132 KB
testcase_25	AC	177 ms 32,244 KB
testcase_26	AC	51 ms 26,716 KB
testcase_27	AC	51 ms 26,716 KB
testcase_28	AC	50 ms 26,716 KB
testcase_29	AC	63 ms 31,568 KB
testcase_30	AC	93 ms 40,720 KB
testcase_31	AC	67 ms 36,036 KB
testcase_32	AC	63 ms 31,316 KB

権限があれば一括ダウンロードができます

コンパイルメッセージ

main.cpp: In member function 'void tree::dfs_(long long int, long long int, bool)':
main.cpp:124:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
  124 |         for(auto[nx,cost]:G[s]){
      |                 ^
main.cpp: In member function 'std::vector<long long int> tree::adj(long long int)':
main.cpp:198:17: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
  198 |         for(auto[x,c]:G[i]){
      |                 ^
main.cpp: In function 'int main()':
main.cpp:226:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
  226 |         auto[u,v] = ed[i];
      |             ^

ソースコード

raw source code

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define rep(i,n) for(int i=0;i<n;i++)
#define Pr pair<ll,ll>
#define Tp tuple<int,int,int>
#define all(v) v.begin(),v.end()
#define riano_ std::ios::sync_with_stdio(false);std::cin.tie(nullptr)
using Graph = vector<vector<ll>>;

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;

vector<bool> val(100001,false);
vector<ll> sum(100001);
//tree
#define type long long
type el = 0LL;
vector<type> emp = {};
struct tree {
    long long N;
	vector<vector<pair<long long,long long>>> G;
    vector<long long> depth;
    vector<long long> subtree_size;
    vector<long long> deg;
    vector<long long> par;
    vector<int> vis;
    vector<type> dp;
    vector<vector<type>> dp_cand;
    long long len;
    long long euler_time;
    long long limit_len = 2e9;
    vector<long long> from_e1;
    vector<long long> from_e2;
    long long cen,end1,end2,diam;
	tree(long long n) {
        N = n;
		G = vector<vector<pair<long long,long long>>>(N);
        depth = vector<long long>(N,-1);
        par = vector<long long>(N,-1);
        subtree_size = vector<long long>(N,1);
        deg = vector<long long>(N,0);
	}

    //DP 操作: 書き換え必須
    void dp_operation(long long s){
        if(par[s]!=-1){
            val[par[s]] = (val[par[s]]|val[s]);
        }
    }

    //Euler Tour で何かする場合は書き足す
    void dfs_(long long s,long long i,bool dp_){
        len++;
        euler_time++;
        
        for(auto[nx,cost]:G[s]){
            if(len>=limit_len) break;
            if(vis[nx]==i) continue;
            if(!val[nx]){
                sum[nx] = sum[s]+1;
            }
            depth[nx] = depth[s] + cost;
            vis[nx] = i;
            par[nx] = s;
            dfs_(nx,i,dp_);
        }
        if(par[s]!=-1){
            subtree_size[par[s]] += subtree_size[s];
        }
        if(dp_) dp_operation(s);
        len--;
        
    }
	
    //c は辺の重み
    void unite(long long a,long long b,long long c = 1){
        G[a].emplace_back(b,c);
        G[b].emplace_back(a,c);
        deg[a]++; deg[b]++;
    }

    //lim は探索長さ制限 dfs_count は探索累積回数（前回訪問済情報を残す場合）
    void dfs(long long rt,bool dp_ = false,long long lim = 2e9,long long dfs_count = 0){
        if(dfs_count==0) vis.assign(N,-1);
        if(dp_){
            dp.assign(N,el);
            dp_cand.assign(N,emp);
        }
        limit_len = lim;
        euler_time = -1;
        len = -1;
        vis[rt] = dfs_count; depth[rt] = 0;
        dfs_(rt,dfs_count,dp_);
    }

    long long diameter(ll rt){
        dfs(rt);
        from_e2 = depth;
        long long mx = -1;
        for(int i=0;i<N;i++){
            if(from_e2[i]>mx){
                end1 = i; mx = from_e2[i];
            }
        }
        dfs(end1);
        from_e1 = depth;
        mx = -1;
        for(int i=0;i<N;i++){
            if(from_e1[i]>mx){
                end2 = i; mx = from_e1[i];
            }
        }
        dfs(end2);
        from_e2 = depth;
        diam = mx;
        return diam;
    }

    long long center(void){
        for(int i=0;i<N;i++){
            if(from_e1[i]==from_e2[i]&&from_e2[i]==diam/2){
                cen = i; break;
            }
        }
        return cen;
    }

    vector<long long> adj(long long i){
        vector<long long> res;
        for(auto[x,c]:G[i]){
            res.push_back(x);
        }
        return res;
    }
	
};
    

int main() {
    riano_; ll ans = 0;
    ll N,K; cin >> N >> K;
    //main関数内で 
    tree tr(N+1),tr2(N+1);
    vector<Pr> ed;
    rep(i,N-1){
        ll u,v; cin >> u >> v;
        tr.unite(u,v);
        ed.push_back(make_pair(u,v));
    }
    ll rt = 0;
    rep(i,K){
        ll d; cin >> d; rt = d;
        val[d] = true;
    }
    tr.dfs(rt,true);
    ll all = 0;
    rep(i,N-1){
        auto[u,v] = ed[i];
        if(val[u]&val[v]){
            tr2.unite(u,v);
            all += 2;
        }
    }
    tr2.diameter(rt);
    rep(i,N){
        if(val[i+1]){
            sum[i+1] = all-max(tr2.from_e1[i+1],tr2.from_e2[i+1]);
        }
    }
    tr.dfs(rt);
    rep(i,N){
        cout << sum[i+1] << "\n";
    }
    //cout << ans << endl;
}

yukicoder

結果

テストケース

コンパイルメッセージ

ソースコード