Submission #307019

#	Time	Username	Problem	Language	Result	Execution time	Memory
307019		NintsiChkhaidze	Exercise Deadlines (CCO20_day1problem2)	C++14	0 / 25	1048 ms	384 KiB

Main

#include <bits/stdc++.h>
#define f first
#define s second
#define pb push_back
#define ll long long
using namespace std;
int a[200005],b[200005];
int main(){
    ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    int n;
    cin>>n;
    for (int i = 1; i <= n; i++)
        cin>>a[i],b[i] = a[i];
    sort(b + 1,b + n + 1);
    for (int i = 1;i <= n; i++)
        if (b[i] < i) {
            cout<<-1;
            return 0;
        }
    int ans=0;
    while (true){
        int ind = 0;
        for (int i = 1; i <= n; i++)
            if (a[i] < i) {ind = i; break;}
        if (ind == 0) break;
        //cout<<ind<<" "<<a[ind]<<endl;
        int m = a[ind];
        for (int i = ind - 1; i >= 1; i--){
            if (a[i] == a[i + 1]) continue;
            swap(a[i],a[i + 1]);
            ans++;
            if (m >= i) break;
        }
        /*
        for (int i =1;i<=n;i++)
            cout<<a[i]<<" ";
        cout<<endl;
        */
    }
    cout<<ans;
}

• Subtask 1: 0 / 17
• Subtask 2: 0 / 8