Submission #1260909

#	Time	Username	Problem	Language	Result	Execution time	Memory
1260909		Szymon_Pilipczuk	Passport (JOI23_passport)	C++20	6 / 100	64 ms	1092 KiB

passport

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define st first
#define nd second
#define pb push_back
#define all(a) a.begin(),a.end()
#define rep(a,b) for(int a = 0;a<b;a++)
const int inf = 1e9;
const ll infl = 1e18;
int rang[200000];
int main()
{
    int n;
    cin>>n;
    rep(i,n)
    {
        int a,b;
        cin>>a>>b;
        rang[i] = b-1;
    }
    int uss;
    cin>>uss>>uss;
    int r = 0;
    int mx = rang[0];
    int ans = 0;
    while(r < n-1)
    {
        int prev = r;
        r = mx;
        for(int i = prev + 1;i<=r;i++)
        {
            mx = max(mx,rang[i]);
        }
        ans++;
        if(prev == r)
        {
            cout<<-1<<"\n";
            return 0;
        }
    }
    cout<<ans<<"\n";
}

• Subtask 1: 6 / 6
• Subtask 2: 0 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 8
• Subtask 5: 0 / 46