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Submission #18594

# Submission time Handle Problem Language Result Execution time Memory
18594 2016-02-10T09:41:12 Z eaststar Cactus? Not cactus? (kriii1_C) C++14
1 / 1
 48 ms 6836 KB 
#include <stdio.h>
struct al{
    int e,nx;
}a[200010];
int st[100010],chk[100010],p[100010],cycle[100010],t;
void make_al(int s,int e){a[++t].nx=st[s],a[t].e=e,st[s]=t;}
void get_cycle(int s,int x){
    ++cycle[x];
    for(;;){
        ++cycle[s];
        s=p[s];
        if(s==x)return;
    }
}
void DFS(int s){
    int i;
    chk[s]=1;
    for(i=st[s];i;i=a[i].nx)if(chk[a[i].e]){
        if(p[s]==a[i].e)continue;
        get_cycle(s,a[i].e);
    }
    for(i=st[s];i;i=a[i].nx)if(!chk[a[i].e]){
        p[a[i].e]=s;
        DFS(a[i].e);
    }
}
int main(){
    int i,n,m,s,e;
    scanf("%d%d",&n,&m);
    for(i=1;i<=m;++i){
        scanf("%d%d",&s,&e);
        make_al(s,e),make_al(e,s);
    }
    DFS(1);
    for(i=1;i<=n;++i)if(cycle[i]>1){
        puts("Not cactus");
        return 0;
    }
    puts("Cactus");
    return 0;
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 4208 KB Output is correct
2 Correct 0 ms 4208 KB Output is correct
3 Correct 0 ms 4208 KB Output is correct
4 Correct 0 ms 4208 KB Output is correct
5 Correct 0 ms 4208 KB Output is correct
6 Correct 0 ms 4208 KB Output is correct
7 Correct 0 ms 4208 KB Output is correct
8 Correct 2 ms 4208 KB Output is correct
9 Correct 0 ms 4208 KB Output is correct
10 Correct 30 ms 4208 KB Output is correct
11 Correct 16 ms 4208 KB Output is correct
12 Correct 27 ms 5668 KB Output is correct
13 Correct 29 ms 5032 KB Output is correct
14 Correct 25 ms 4984 KB Output is correct
15 Correct 35 ms 5056 KB Output is correct
16 Correct 28 ms 5288 KB Output is correct
17 Correct 15 ms 5800 KB Output is correct
18 Correct 36 ms 5856 KB Output is correct
19 Correct 48 ms 6836 KB Output is correct
20 Correct 28 ms 5048 KB Output is correct
21 Correct 35 ms 4968 KB Output is correct
22 Correct 30 ms 6356 KB Output is correct
23 Correct 0 ms 4208 KB Output is correct
24 Correct 0 ms 4208 KB Output is correct
25 Correct 0 ms 4316 KB Output is correct
26 Correct 39 ms 4208 KB Output is correct
27 Correct 13 ms 4208 KB Output is correct
28 Correct 34 ms 4208 KB Output is correct
29 Correct 37 ms 4208 KB Output is correct
30 Correct 17 ms 4208 KB Output is correct
31 Correct 28 ms 4208 KB Output is correct
32 Correct 32 ms 4208 KB Output is correct
33 Correct 25 ms 4208 KB Output is correct
34 Correct 40 ms 4208 KB Output is correct