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답안 #584751

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
584751 2022-06-28T01:33:01 Z perchuts 열대 식물원 (Tropical Garden) (IOI11_garden) C++17
100 / 100
 232 ms 95036 KB 
#include <bits/stdc++.h>
#define all(x) x.begin(), x.end()
#define sz(x) (int) x.size()
#define endl '\n'
#define pb push_back
#define _ ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#include "garden.h"
#include "gardenlib.h"
using namespace std;

using ll = long long;
using ull = unsigned long long;
using ii = pair<int,int>;
using iii = tuple<int,int,int>;

const int inf = 2e9+1;
const int mod = 1e9+7;
const int maxn = 1e6+100;

template<typename X, typename Y> bool ckmin(X& x, const Y& y) { return (y < x) ? (x=y,1):0; }
template<typename X, typename Y> bool ckmax(X& x, const Y& y) { return (x < y) ? (x=y,1):0; }

vector<int>g[maxn], ciclo[maxn], g2[maxn];

int n, f[maxn], dist[maxn], vis[maxn], res[maxn];

// void answer(int x){cout<<x<<endl;}

void dfs(int u,int d){
    vis[u] = 2;
    dist[u] = d;
    for(auto v:g2[u]){
        if(vis[v]!=2)dfs(v,d+1);
    }
}

void compute(int P, int Q,int G[]){
    for(int i=0;i<=2*n;++i){
        vis[i] = dist[i] = 0;
        ciclo[i].clear();
    }
    int cur = P, tciclo = 0;
    while(vis[cur]==0){
        vis[cur] = 1, cur = f[cur];
    }
    while(vis[cur]==1){
        vis[cur] = 2, cur = f[cur], ++tciclo;
    }
    //achei o ciclo da componente de p
    if(vis[P]==1){
        tciclo = 1e9, vis[f[P]] = 2;
        dfs(P,0);
        vis[f[P]] = 0;
    }else{
        cur = P;
        int d = tciclo;
        do{
            dfs(cur, d%tciclo), cur = f[cur], d--;
        } while(cur!=P);
        if(P<n)ciclo[0].pb(tciclo);
    }
    for(int i=0;i<n;++i){
        if(vis[i]&&dist[i]){
            ciclo[dist[i]%tciclo].pb(dist[i]);                
        }
    }
    for(int i=0;i<min(tciclo,3*n);++i){
        sort(all(ciclo[i]));
    }
    for(int i=0;i<Q;++i){
        int cur = G[i];
        if(tciclo==1e9&&cur>2*n)continue;
        int ans = upper_bound(all(ciclo[cur%tciclo]),cur) - begin(ciclo[cur%tciclo]);
        res[i] += ans;
    }
    
}

void count_routes(int N, int M, int P, int R[][2], int Q, int G[])
{
    n = N;
    for(int i=0;i<M;++i){
        int u = R[i][0], v = R[i][1];
        g[u].pb(v), g[v].pb(u);
    }
    //grafo funcional, achar distancia de cada vertice pra p   
    for(int i=0;i<2*n;++i){
        int act = i%n;
        if(i<n||sz(g[act])==1){
            int best = g[act][0];
            if(g[best][0]==act)f[i] = best+n;
            else f[i] = best;
        }else{
            if(g[g[act][1]][0]==act)f[i] = g[act][1] + n;
            else f[i] = g[act][1];
        }
        g2[i].pb(f[i]), g2[f[i]].pb(i);
        // cout<<i<<" "<<f[i]<<endl;
    }

    compute(P,Q,G), compute(P+n,Q,G);

    for(int i=0;i<Q;++i){
        answer(res[i]);
    }
}

// int v[maxn][2], queries[maxn];

// int main(){
//     int n,m,p,q;cin>>n>>m>>p>>q;
//     for(int i=0;i<m;++i){
//         cin>>v[i][0]>>v[i][1];
//     }
//     for(int i=0;i<q;++i)cin>>queries[i];
//     count_routes(n,m,p,v,q,queries);
// }

Subtask #1
49.0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 70868 KB Output is correct
2 Correct 33 ms 70812 KB Output is correct
3 Correct 38 ms 70896 KB Output is correct
4 Correct 33 ms 70752 KB Output is correct
5 Correct 33 ms 70792 KB Output is correct
6 Correct 33 ms 70952 KB Output is correct
7 Correct 33 ms 70740 KB Output is correct
8 Correct 34 ms 70872 KB Output is correct
9 Correct 41 ms 70996 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 70868 KB Output is correct
2 Correct 33 ms 70812 KB Output is correct
3 Correct 38 ms 70896 KB Output is correct
4 Correct 33 ms 70752 KB Output is correct
5 Correct 33 ms 70792 KB Output is correct
6 Correct 33 ms 70952 KB Output is correct
7 Correct 33 ms 70740 KB Output is correct
8 Correct 34 ms 70872 KB Output is correct
9 Correct 41 ms 70996 KB Output is correct
10 Correct 32 ms 70708 KB Output is correct
11 Correct 44 ms 73672 KB Output is correct
12 Correct 57 ms 75780 KB Output is correct
13 Correct 75 ms 84072 KB Output is correct
14 Correct 171 ms 88476 KB Output is correct
15 Correct 221 ms 89356 KB Output is correct
16 Correct 216 ms 83816 KB Output is correct
17 Correct 178 ms 81856 KB Output is correct
18 Correct 60 ms 76264 KB Output is correct
19 Correct 174 ms 90220 KB Output is correct
20 Correct 211 ms 90956 KB Output is correct
21 Correct 207 ms 85256 KB Output is correct
22 Correct 143 ms 83208 KB Output is correct
23 Correct 168 ms 92032 KB Output is correct

Subtask #3
31.0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Correct 32 ms 70868 KB Output is correct
2 Correct 33 ms 70812 KB Output is correct
3 Correct 38 ms 70896 KB Output is correct
4 Correct 33 ms 70752 KB Output is correct
5 Correct 33 ms 70792 KB Output is correct
6 Correct 33 ms 70952 KB Output is correct
7 Correct 33 ms 70740 KB Output is correct
8 Correct 34 ms 70872 KB Output is correct
9 Correct 41 ms 70996 KB Output is correct
10 Correct 32 ms 70708 KB Output is correct
11 Correct 44 ms 73672 KB Output is correct
12 Correct 57 ms 75780 KB Output is correct
13 Correct 75 ms 84072 KB Output is correct
14 Correct 171 ms 88476 KB Output is correct
15 Correct 221 ms 89356 KB Output is correct
16 Correct 216 ms 83816 KB Output is correct
17 Correct 178 ms 81856 KB Output is correct
18 Correct 60 ms 76264 KB Output is correct
19 Correct 174 ms 90220 KB Output is correct
20 Correct 211 ms 90956 KB Output is correct
21 Correct 207 ms 85256 KB Output is correct
22 Correct 143 ms 83208 KB Output is correct
23 Correct 168 ms 92032 KB Output is correct
24 Correct 34 ms 70732 KB Output is correct
25 Correct 44 ms 73832 KB Output is correct
26 Correct 59 ms 76272 KB Output is correct
27 Correct 77 ms 85128 KB Output is correct
28 Correct 172 ms 90116 KB Output is correct
29 Correct 205 ms 91084 KB Output is correct
30 Correct 188 ms 85244 KB Output is correct
31 Correct 142 ms 83376 KB Output is correct
32 Correct 61 ms 76388 KB Output is correct
33 Correct 176 ms 90176 KB Output is correct
34 Correct 232 ms 91004 KB Output is correct
35 Correct 186 ms 85336 KB Output is correct
36 Correct 146 ms 83300 KB Output is correct
37 Correct 173 ms 92116 KB Output is correct
38 Correct 148 ms 95036 KB Output is correct