QOJ.ac

QOJ

ID	Problem	Submitter	Result	Time	Memory	Language	File size	Submit time	Judge time
#30213	#2569. Kill All Termites	yzhang	AC ✓	9ms	4944kb	C++17	1.1kb	2022-04-25 21:52:16	2022-04-28 16:27:42

Judging History

你现在查看的是最新测评结果

[2023-08-10 23:21:45]
System Update: QOJ starts to keep a history of the judgings of all the submissions.

[2022-04-28 16:27:42]
评测

测评结果：AC
用时：9ms
内存：4944kb

查看

[2022-04-25 21:52:16]
提交

answer

//μ's forever
#include <bits/stdc++.h>
#define N 100005
//#define getchar nc
using namespace std;
inline char nc(){
    static char buf[100000],*p1=buf,*p2=buf;
    return p1==p2&&(p2=(p1=buf)+fread(buf,1,100000,stdin),p1==p2)?EOF:*p1++;
}
inline int read()
{
    register int x=0,f=1;register char ch=getchar();
    while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
    while(ch>='0'&&ch<='9')x=(x<<3)+(x<<1)+ch-'0',ch=getchar();
    return x*f;
}
inline void write(register int x)
{
    if(!x)putchar('0');if(x<0)x=-x,putchar('-');
    static int sta[20];register int tot=0;
    while(x)sta[tot++]=x%10,x/=10;
    while(tot)putchar(sta[--tot]+48);
}
int n,fa[N],deg[N],cnt[N],ans;
int main()
{
    n=read();
    for(int i=2;i<=n;++i){
        fa[i]=read();
        ++deg[fa[i]];
    }
    for(int i=n;i>=1;--i){
        if(deg[i]==0) cnt[i]=1;
        if(i==1&&deg[i]==1) ++cnt[i];
        if(cnt[i]>1){
            cnt[i]=0;
            ++ans;
        }
        cnt[fa[i]]+=cnt[i];
    }
    if(n==1){
        puts("1");
        return 0;
    }
    printf("%d\n",ans);
    return 0;
}

Source code, Language: C++17

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100

Accepted

time: 0ms

memory: 3664kb

input:

output:

result:

ok 1 number(s): "1"

Test #2:

score: 0

Accepted

time: 0ms

memory: 3624kb

input:

2
1

output:

result:

ok 1 number(s): "1"

Test #3:

score: 0

Accepted

time: 2ms

memory: 3780kb

input:

8
1 1 2 1 2 3 2

output:

result:

ok 1 number(s): "2"

Test #4:

score: 0

Accepted

time: 2ms

memory: 3704kb

input:

3
1 1

output:

result:

ok 1 number(s): "1"

Test #5:

score: 0

Accepted

time: 2ms

memory: 3664kb

input:

4
1 1 1

output:

result:

ok 1 number(s): "1"

Test #6:

score: 0

Accepted

time: 2ms

memory: 3720kb

input:

5
1 1 1 1

output:

result:

ok 1 number(s): "1"

Test #7:

score: 0

Accepted

time: 3ms

memory: 3780kb

input:

6
1 2 2 2 1

output:

result:

ok 1 number(s): "1"

Test #8:

score: 0

Accepted

time: 2ms

memory: 3752kb

input:

7
1 2 1 4 3 4

output:

result:

ok 1 number(s): "1"

Test #9:

score: 0

Accepted

time: 3ms

memory: 3580kb

input:

9
1 1 2 3 1 4 2 7

output:

result:

ok 1 number(s): "2"

Test #10:

score: 0

Accepted

time: 1ms

memory: 3716kb

input:

10
1 2 3 3 1 2 3 7 9

output:

result:

ok 1 number(s): "2"

Test #11:

score: 0

Accepted

time: 2ms

memory: 3664kb

input:

11
1 1 2 1 5 6 7 3 3 2

output:

result:

ok 1 number(s): "2"

Test #12:

score: 0

Accepted

time: 0ms

memory: 3716kb

input:

12
1 1 3 3 2 1 4 7 4 8 10

output:

result:

ok 1 number(s): "2"

Test #13:

score: 0

Accepted

time: 2ms

memory: 3692kb

input:

13
1 1 3 4 1 4 4 3 6 1 1 4

output:

result:

ok 1 number(s): "2"

Test #14:

score: 0

Accepted

time: 3ms

memory: 3708kb

input:

14
1 2 3 2 4 1 4 7 3 9 7 8 4

output:

result:

ok 1 number(s): "3"

Test #15:

score: 0

Accepted

time: 0ms

memory: 3728kb

input:

100
1 2 1 1 3 6 5 5 4 8 4 4 3 14 10 14 8 13 12 18 8 3 7 1 12 10 9 17 26 30 21 11 29 19 20 25 17 10 9 26 6 40 42 29 2 24 14 25 6 41 47 24 21 46 28 8 30 2 19 41 54 43 23 1 65 21 19 35 58 8 71 59 12 2 13 4 16 7 22 58 26 44 1 12 14 80 19 12 43 77 21 54 41 94 37 61 28 82 30

output:

result:

ok 1 number(s): "19"

Test #16:

score: 0

Accepted

time: 3ms

memory: 3648kb

input:

100
1 2 3 4 4 6 7 8 9 10 11 10 13 14 15 16 17 17 19 19 15 22 23 15 13 26 27 28 29 30 30 32 28 26 13 36 37 38 39 40 41 42 43 44 45 45 47 48 48 48 51 47 44 54 43 56 56 58 59 60 60 59 63 64 64 66 66 64 69 70 56 72 73 72 75 76 77 42 40 80 40 82 83 83 85 85 85 88 89 88 91 40 38 37 95 96 95 95 2

output:

result:

ok 1 number(s): "17"

Test #17:

score: 0

Accepted

time: 3ms

memory: 3588kb

input:

1000
1 2 3 3 5 6 7 8 9 10 11 12 11 14 15 16 16 18 19 19 21 22 23 22 21 26 27 28 29 30 31 28 27 27 35 26 37 38 39 40 41 42 43 44 41 40 47 39 18 50 51 52 53 54 55 56 57 58 59 60 60 58 57 64 65 66 67 66 65 70 71 72 73 72 64 76 76 78 79 80 56 82 18 84 84 86 86 88 88 14 14 92 14 94 94 96 96 98 98 100 101...

output:

result:

ok 1 number(s): "169"

Test #18:

score: 0

Accepted

time: 3ms

memory: 3588kb

input:

1000
1 2 2 2 2 2 7 2 2 2 2 2 2 2 15 15 15 2 2 2 21 1 23 23 25 25 23 1 1 1 31 31 31 31 31 31 31 1 39 40 39 42 43 42 42 42 39 39 39 50 50 39 39 54 54 39 57 57 39 60 60 60 60 60 60 39 67 67 69 67 67 67 67 39 75 75 77 77 75 75 75 39 39 39 85 39 39 39 39 39 91 91 93 39 95 95 95 98 98 95 95 95 103 103 105...

output:

result:

ok 1 number(s): "152"

Test #19:

score: 0

Accepted

time: 3ms

memory: 3736kb

input:

1000
1 2 3 4 5 6 7 8 7 10 11 11 10 14 6 4 17 17 19 20 3 22 23 23 25 26 23 28 29 30 31 32 33 33 31 36 37 31 3 2 41 42 43 44 42 46 47 48 49 50 51 48 53 54 53 56 57 57 59 60 60 62 63 64 64 66 66 59 69 70 71 70 69 74 75 75 53 78 79 78 78 82 83 53 85 86 86 88 88 88 85 85 85 47 95 96 97 98 99 100 101 100 ...

output:

result:

ok 1 number(s): "181"

Test #20:

score: 0

Accepted

time: 2ms

memory: 3748kb

input:

1000
1 2 3 3 5 6 3 8 9 9 3 12 12 12 2 2 17 18 17 20 20 20 17 17 25 17 17 28 2 30 30 32 30 30 35 30 2 38 2 40 41 41 40 40 40 46 47 48 46 50 46 52 46 54 55 54 54 54 2 60 61 62 61 60 60 66 60 60 2 70 71 2 73 73 75 73 77 77 73 80 81 80 83 73 85 85 73 88 88 90 90 88 2 94 95 95 94 98 98 98 101 101 98 104 ...

output:

result:

ok 1 number(s): "205"

Test #21:

score: 0

Accepted

time: 2ms

memory: 3740kb

input:

1000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 28 30 31 32 33 34 35 36 31 38 39 40 41 42 43 44 44 46 47 47 49 50 44 52 44 54 55 56 57 58 59 60 61 62 63 64 65 66 66 68 69 70 71 72 72 72 75 76 77 78 79 77 81 82 76 84 85 85 71 88 71 90 91 91 93 94 94 96 90 98 99 100 101...

output:

result:

ok 1 number(s): "165"

Test #22:

score: 0

Accepted

time: 0ms

memory: 3736kb

input:

1000
1 2 2 2 2 2 2 2 1 1 1 1 13 13 13 13 13 13 13 13 13 13 13 1 25 25 1 1 1 1 1 1 1 1 1 1 1 38 38 38 38 38 38 38 38 38 38 38 38 38 38 52 38 38 38 38 38 38 38 38 38 38 38 38 38 66 38 1 1 70 70 70 70 70 70 70 70 70 70 70 70 1 1 1 1 1 1 88 88 1 1 1 1 1 1 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 96 ...

output:

result:

ok 1 number(s): "60"

Test #23:

score: 0

Accepted

time: 3ms

memory: 4868kb

input:

100000
1 2 3 3 5 6 7 8 9 10 11 12 10 14 14 16 17 18 19 19 21 21 23 23 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 39 41 42 41 44 44 46 47 37 49 50 51 49 49 54 55 55 57 58 59 60 60 62 63 64 64 64 62 62 62 70 70 72 62 74 62 76 77 78 79 76 81 82 83 76 76 86 87 88 88 90 88 88 93 62 95 59 59 98 98 100 1...

output:

result:

ok 1 number(s): "16927"

Test #24:

score: 0

Accepted

time: 9ms

memory: 4852kb

input:

100000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 15 17 18 19 20 21 22 23 24 25 20 27 27 29 30 31 30 27 34 34 36 19 38 39 40 41 39 43 44 43 46 46 48 48 48 51 52 53 53 55 56 57 58 59 60 61 62 62 64 65 66 62 68 69 70 71 72 73 73 75 76 77 78 79 77 76 82 83 84 85 84 87 82 82 76 91 92 93 92 95 91 97 98 98 100 1...

output:

result:

ok 1 number(s): "16621"

Test #25:

score: 0

Accepted

time: 9ms

memory: 4892kb

input:

100000
1 2 3 4 5 6 7 8 9 10 11 12 11 14 15 16 17 18 19 20 20 22 23 24 24 26 27 27 29 24 31 32 33 34 35 36 37 36 39 40 40 40 40 44 44 46 47 47 49 49 47 52 46 54 54 56 56 58 59 60 61 62 63 64 64 66 67 68 69 70 71 72 67 74 75 76 77 77 79 80 81 82 83 84 85 85 85 88 89 88 88 92 93 93 92 92 88 98 99 100 1...

output:

result:

ok 1 number(s): "16484"

Test #26:

score: 0

Accepted

time: 0ms

memory: 4944kb

input:

100000
1 2 3 4 5 5 7 8 9 10 11 10 7 14 15 16 16 7 19 20 21 21 23 21 25 21 20 20 29 30 30 32 33 34 34 33 37 38 39 40 38 33 43 44 43 29 47 48 49 50 51 49 49 48 55 56 57 56 59 60 59 56 63 64 64 63 67 68 67 70 71 63 73 63 75 76 77 76 75 80 55 47 83 83 85 85 87 88 89 90 89 83 93 94 47 96 47 98 99 99 47 1...

output:

result:

ok 1 number(s): "18227"

Test #27:

score: 0

Accepted

time: 1ms

memory: 4864kb

input:

100000
1 2 2 4 5 6 7 8 9 10 11 12 13 14 15 16 16 16 19 20 21 22 23 24 25 26 27 28 29 30 31 32 29 34 28 36 37 37 26 40 41 42 42 44 45 46 44 48 49 44 44 40 53 54 55 53 57 58 59 60 60 62 62 64 65 60 67 68 67 67 67 59 73 74 75 76 40 78 40 80 81 82 81 84 84 86 87 88 89 86 91 92 93 94 94 93 97 97 99 93 10...

output:

result:

ok 1 number(s): "17563"

Test #28:

score: 0

Accepted

time: 6ms

memory: 4880kb

input:

100000
1 2 3 3 3 3 3 2 2 2 2 2 2 14 14 14 14 14 14 14 2 2 23 2 25 25 2 2 29 2 2 32 32 32 32 32 2 2 2 40 2 2 43 43 43 2 47 47 2 2 51 51 1 54 54 1 57 57 57 57 1 62 63 62 62 66 62 68 68 62 62 72 62 62 62 76 76 62 79 62 62 62 1 84 84 86 86 86 86 86 86 86 84 84 95 95 95 84 99 99 99 99 99 99 84 106 106 10...

output:

result:

ok 1 number(s): "11610"

Test #29:

score: 0

Accepted

time: 1ms

memory: 3664kb

input:

30
1 1 1 1 2 6 7 8 9 10 10 11 12 13 14 15 15 17 18 19 20 21 22 23 24 25 26 26 26

output:

result:

ok 1 number(s): "3"