oj.uz

답안 #16317

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
16317 2015-08-21T04:36:15 Z khsoo01 열대 식물원 (Tropical Garden) (IOI11_garden) C++
0 / 100
 9 ms 8056 KB 
#include<bits/stdc++.h>
#include "garden.h"
#include "gardenlib.h"
#define INF 0x7fffffff
using namespace std;
vector<int>cg[150005],cn[150005];
int n,m,p,ed[150005][2],cur,flag,vis[150005],cnt;
bool state;

struct destination {
    int dist[150005],cyc_len=0;
    bool in_cyc=false;
}d[2];

void find_cyc(int idx) {
    if(vis[idx]==1) {
        if(!d[state].in_cyc && idx!=cn[p][state]) return;
        d[state].in_cyc=true;
        d[state].cyc_len++;
    }
    if(vis[idx]==2) return;
    vis[idx]++;
    find_cyc(cn[ed[idx][1]][(cg[ed[idx][1]][0]==ed[idx][0] && cg[ed[idx][1]].size()>1)?1:0]);
    vis[idx]=0;
}

int find_dist(int idx) {
    if(cn[p][state]==idx) return 0;
    if(vis[idx]) {
        return d[state].dist[idx];
    }
    vis[idx]++;
    int ret=find_dist(cn[ed[idx][1]][(cg[ed[idx][1]][0]==ed[idx][0] && cg[ed[idx][1]].size()>1)?1:0]);
    return d[state].dist[idx]=ret+1;
}

void count_routes(int N, int M, int P, int R[][2], int Q, int G[])
{
    int i,j,k; n=N; m=M; p=P;
    for(i=0;i<m;i++) {
        ed[i][0]=R[i][0];
        ed[i][1]=R[i][1];
        ed[i+m][0]=R[i][1];
        ed[i+m][1]=R[i][0];
        cg[ed[i][0]].push_back(ed[i][1]);
        cn[ed[i][0]].push_back(i);
        cg[ed[i][1]].push_back(ed[i][0]);
        cn[ed[i][1]].push_back(i+m);
        d[0].dist[i]=-INF;
        d[1].dist[i]=-INF;
    }
    state=0;
    find_cyc(cn[p][0]);
    state=1;
    find_cyc(cn[p][1]);
    state=0;
    for(i=0;i<m;i++) {
        if(vis[i])continue;
        find_dist(i);
    }
    state=1;
    memset(vis,0,sizeof(vis));
    for(i=0;i<m;i++) {
        if(vis[i])continue;
        find_dist(i);
    }
    for(i=0;i<Q;i++) {
        cnt=0;
        for(j=0;j<n;j++) {
            flag=0;
            for(k=0;k<2;k++) {
                if(d[k].dist[cn[j][0]]<0) continue;
                if(d[k].dist[cn[j][0]]==G[i])flag=1;
                if(d[k].dist[cn[j][0]]<G[i] && d[k].in_cyc && (G[i]-d[k].dist[cn[j][0]])%d[k].cyc_len==0)flag=1;
            }
            if(flag)cnt++;
        }
        answer(cnt);
    }
}

Subtask #1
0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 9 ms 8056 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 9 ms 8056 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 9 ms 8056 KB Output isn't correct
2 Halted 0 ms 0 KB -