Submission #5121

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
5121	2014-02-10 04:10:55	ainta	Cactus? Not cactus? (kriii1_C)	C++98	0 / 1	68 ms	9704 KiB

C

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#include<stdio.h>
#include<algorithm>
#include<vector>
using namespace std;
int par[100010], C;
bool chk[100010], ck;
vector<int>E[100010];
int n;
void DFS(int a, int p){
  par[a] = p;
  int i, x;
  for (i = 0; i < E[a].size(); i++){
    if (E[a][i] == p)continue;
    if (par[E[a][i]]){
      x = a;
      while (x != E[a][i]){
        if (chk[x])ck = true;
        chk[x] = true;
        x = par[x];
      }
      if (chk[x])ck = true;
      chk[x] = true;
      if (ck)return;
    }
  }
  for (i = 0; i < E[a].size(); i++){
    if (!par[E[a][i]]){
      DFS(E[a][i], a);
      if (ck)return;
    }
 
 
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• Subtask 1: 0 / 1