Submission #1305531

#	Time	Username	Problem	Language	Result	Execution time	Memory
1305531		syanvu	Infinite Race (EGOI24_infiniterace2)	C++20	100 / 100	15 ms	1092 KiB

Main

#include <bits/stdc++.h>

#define pb push_back
#define SS ios_base::sync_with_stdio(0);cin.tie(nullptr);cout.tie(nullptr);
// #define int long long
#define all(v) v.begin(),v.end()
using namespace std;

const int N = 2e5 + 1, MX = 4e5 + 177, inf = 1e9 + 1, mod = 998244353;

void solve(){
    int n, q;
    cin >> n >> q;
    int ans = 1;
    vector<int> last(n + 1, 0ll);
    for(int i = 1; i <= q; i++){
        int x;
        cin >> x;
        if(x > 0){
            ans += (last[x] == ans);
            last[x] = ans;
        }
        else{
            last[-x] = 0;
        }
    }
    cout << ans - 1;
}
signed main(){ 
    SS
    // freopen("trains.in", "r", stdin);
    // freopen("trains.out", "w", stdout);
    int t = 1;
    // cin >> t;
    while(t--){
        solve();
    }
}

• Subtask 1: 29 / 29
• Subtask 2: 34 / 34
• Subtask 3: 22 / 22
• Subtask 4: 15 / 15