Submission #2123643
Source Code Expand
#include<bits/stdc++.h> #define mp make_pair #define F first #define S second using namespace std; typedef pair<int, int> ii; typedef vector<ii> vii; typedef long long ll; typedef vector<int> vi; const int MAXN = 1e5 +2; int balls[MAXN], n, m, x, y, ans; bool red[MAXN]; int main(){ // freopen(".in", "r", stdin); ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); cin >> n >> m; fill(balls, balls + n + 1, 1); red[1] = true; ans = 1; while(m--){ cin >> x >> y; if(red[x]){ if(balls[x] == 1){ ans--; red[x] = false; } if(!red[y]) ans++; red[y] = true; } balls[x]--; balls[y]++; } cout << ans; return 0; }
Submission Info
Submission Time | |
---|---|
Task | B - Box and Ball |
User | vjudge1 |
Language | C++14 (GCC 5.4.1) |
Score | 400 |
Code Size | 654 Byte |
Status | AC |
Exec Time | 18 ms |
Memory | 768 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 400 / 400 | ||||
Status |
|
|
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 | 256 KB |
0_01.txt | AC | 1 ms | 256 KB |
0_02.txt | AC | 1 ms | 256 KB |
1_00.txt | AC | 1 ms | 256 KB |
1_01.txt | AC | 1 ms | 256 KB |
1_02.txt | AC | 1 ms | 256 KB |
1_03.txt | AC | 1 ms | 256 KB |
1_04.txt | AC | 14 ms | 640 KB |
1_05.txt | AC | 16 ms | 768 KB |
1_06.txt | AC | 14 ms | 512 KB |
1_07.txt | AC | 16 ms | 512 KB |
1_08.txt | AC | 11 ms | 512 KB |
1_09.txt | AC | 12 ms | 640 KB |
1_10.txt | AC | 4 ms | 640 KB |
1_11.txt | AC | 7 ms | 384 KB |
1_12.txt | AC | 2 ms | 768 KB |
1_13.txt | AC | 15 ms | 512 KB |
1_14.txt | AC | 9 ms | 384 KB |
1_15.txt | AC | 14 ms | 384 KB |
1_16.txt | AC | 2 ms | 512 KB |
1_17.txt | AC | 17 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 | 17 ms | 640 KB |
1_23.txt | AC | 5 ms | 640 KB |