Submission #8520676


Source Code Expand

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#include<bits/stdc++.h>
#define MAXN 100005
#define INF 1000000000
#define MOD 1000000007
#define F first
#define S second
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
int N,M,cnt[MAXN];
bool has[MAXN];
int main()
{
    scanf("%d%d",&N,&M);
    memset(has,false,sizeof(has));
    for(int i=1;i<=N;i++) cnt[i]=1;
    has[1]=true;
    for(int i=0;i<M;i++)
    {
        int x,y;
        scanf("%d%d",&x,&y);
        if(has[x]) has[y]=true;
        cnt[x]--; cnt[y]++;
        if(!cnt[x]) has[x]=false;
    }
    int ans=0;
    for(int i=1;i<=N;i++) if(has[i]) ans++;
    printf("%d\n",ans);
    return 0;
}

Submission Info

Submission Time
Task B - Box and Ball
User Roundgod
Language C++14 (GCC 5.4.1)
Score 400
Code Size 658 Byte
Status AC
Exec Time 18 ms
Memory 768 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:14:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&N,&M);
                        ^
./Main.cpp:21:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&x,&y);
                            ^

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 400 / 400
Status
AC × 3
AC × 27
Set Name Test Cases
Sample 0_00.txt, 0_01.txt, 0_02.txt
All 0_00.txt, 0_01.txt, 0_02.txt, 1_00.txt, 1_01.txt, 1_02.txt, 1_03.txt, 1_04.txt, 1_05.txt, 1_06.txt, 1_07.txt, 1_08.txt, 1_09.txt, 1_10.txt, 1_11.txt, 1_12.txt, 1_13.txt, 1_14.txt, 1_15.txt, 1_16.txt, 1_17.txt, 1_18.txt, 1_19.txt, 1_20.txt, 1_21.txt, 1_22.txt, 1_23.txt
Case Name Status Exec Time Memory
0_00.txt AC 1 ms 384 KB
0_01.txt AC 1 ms 384 KB
0_02.txt AC 1 ms 384 KB
1_00.txt AC 1 ms 384 KB
1_01.txt AC 1 ms 384 KB
1_02.txt AC 1 ms 384 KB
1_03.txt AC 1 ms 384 KB
1_04.txt AC 16 ms 768 KB
1_05.txt AC 18 ms 768 KB
1_06.txt AC 15 ms 512 KB
1_07.txt AC 17 ms 512 KB
1_08.txt AC 12 ms 512 KB
1_09.txt AC 12 ms 640 KB
1_10.txt AC 5 ms 640 KB
1_11.txt AC 8 ms 384 KB
1_12.txt AC 2 ms 768 KB
1_13.txt AC 16 ms 640 KB
1_14.txt AC 9 ms 384 KB
1_15.txt AC 15 ms 384 KB
1_16.txt AC 2 ms 512 KB
1_17.txt AC 18 ms 768 KB
1_18.txt AC 16 ms 512 KB
1_19.txt AC 18 ms 384 KB
1_20.txt AC 17 ms 384 KB
1_21.txt AC 14 ms 512 KB
1_22.txt AC 18 ms 640 KB
1_23.txt AC 6 ms 640 KB