제출 #439879

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
439879		dutch	열대 식물원 (Tropical Garden) (IOI11_garden)	C++17	0 / 100	7 ms	7444 KiB

garden

#include <bits/stdc++.h>
using namespace std;
#include "garden.h"
#include "gardenlib.h"
 
const int LIM = 1.5e5, INF = 2e9;
 
int n, cnt[LIM], c, d[2][LIM*2], p, r[2] = {INF, INF};
vector<int> g[LIM*2];
 
void dfs(int u, int dist){
	d[c][u] = dist;
	for(int v : g[u]) if(d[c][v] == INF) dfs(v, dist + 1);
}
 
void count_routes(int N, int M, int P, int R[][2], int Q, int G[]){
	n = N, p = P;
	for(int i=0; i<M; ++i){
		for(int j=0; j<2; ++j){
			int u = R[i][j], v = R[i][!j];
			if(cnt[u] == 0) g[v + (!cnt[v])*n].push_back(u);
			if(cnt[u] == 1) g[v + (!cnt[v])*n].push_back(u+n);
			if(u == p && cnt[u] < 2) r[cnt[u]] = v + (!cnt[v])*n;
		}
		for(int j=0; j<2; ++j) ++cnt[R[i][j]];
	}
	for(int j=0; j<2; ++j) if(r[j] < INF && r[j] >= n && cnt[r[j]-n] < 2) r[j] -= n;
	for(int u=0; u<n; ++u) if(cnt[u] < 2)
		for(int v : g[u+n]) g[u].push_back(v);
	for(c=0; c<2; ++c) fill(d[c], d[c]+2*n, INF);
	for(c=0; c<cnt[p]; ++c) dfs(p+c*n, 0);
 
	for(int i=0; i<2; ++i) if(r[i] < INF) r[i] = 1 + d[i][r[i]];
 
	for(int i=0; i<Q; ++i){
		int res = 0;
		for(int u=0; u<n; ++u){
			for(int j=0; j<2; ++j)
				if(d[j][u] <= G[i] && (G[i] - d[j][u]) % r[i] == 0) ++res;
		}
		answer(res);
	}
}

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• Subtask 3: 0 / 31