Submission #826138


Source Code Expand

#include<iostream>
#include<sstream>
#include<fstream>
#include<string>
#include<vector>
#include<deque>
#include<queue>
#include<stack>
#include<set>
#include<map>
#include<algorithm>
#include<functional>
#include<utility>
#include<bitset>
#include<cmath>
#include<cstdlib>
#include<ctime>
#include<cstdio>

using namespace std;

#define REP(i,n) for(int i=0;i<int(n);i++)
#define foreach(c,itr) for(__typeof((c).begin()) itr=(c).begin();itr!=(c).end();itr++)
typedef long long ll;
typedef pair<int,int> P;

int s[100010],c[100010];
int n,m;

int main(void){
	int i;

	cin.tie(0);
	ios_base::sync_with_stdio(false);

	cin >> n >> m;
	for(i=1;i<=n;i++) s[i]=1;
	c[1]=1;

	for(i=1;i<=m;i++){
		int x,y;
		cin >> x >> y;
		if(s[x]==1 && c[x]==1){
			s[x]--;
			c[x]=0;
			s[y]++;
			c[y]=1;
		}
		else if(s[x]>=2 && c[x]==1){
			s[x]--;
			s[y]++;
			c[y]=1;
		}
		else{
			s[x]--;
			s[y]++;
		}
	}

	int ans=0;
	for(i=1;i<=n;i++) ans+=c[i];

	cout << ans << endl;



	return 0;
}

Submission Info

Submission Time
Task B - Box and Ball
User daiota
Language C++14 (GCC 5.4.1)
Score 400
Code Size 1048 Byte
Status AC
Exec Time 34 ms
Memory 1024 KB

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 4 ms 256 KB
0_01.txt AC 4 ms 256 KB
0_02.txt AC 4 ms 256 KB
1_00.txt AC 4 ms 256 KB
1_01.txt AC 4 ms 256 KB
1_02.txt AC 4 ms 256 KB
1_03.txt AC 4 ms 256 KB
1_04.txt AC 28 ms 640 KB
1_05.txt AC 32 ms 1024 KB
1_06.txt AC 27 ms 640 KB
1_07.txt AC 33 ms 640 KB
1_08.txt AC 23 ms 512 KB
1_09.txt AC 24 ms 896 KB
1_10.txt AC 10 ms 768 KB
1_11.txt AC 15 ms 384 KB
1_12.txt AC 6 ms 1024 KB
1_13.txt AC 29 ms 768 KB
1_14.txt AC 17 ms 384 KB
1_15.txt AC 26 ms 384 KB
1_16.txt AC 5 ms 768 KB
1_17.txt AC 34 ms 1024 KB
1_18.txt AC 31 ms 640 KB
1_19.txt AC 32 ms 512 KB
1_20.txt AC 33 ms 384 KB
1_21.txt AC 27 ms 640 KB
1_22.txt AC 34 ms 768 KB
1_23.txt AC 12 ms 768 KB