提出 #69303592

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ソースコード 拡げる

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define endl "\n"


signed main()
{
    ios::sync_with_stdio(0),cin.tie(0);

    int Tc=0,Tests=1;
    //cin>>Tests;
    while(Tc++<Tests)
    {
        ll n;
        cin>>n;
        ll a[n+2] {};
        for(int i=1; i<=n; i++)cin>>a[i];
        ll ans=n-1;
        ll l=0,r=n;/// rooms where they are

        while(l<=r)
        {
            if(!a[r])r--,ans--;
            else break;
        }
        while(l<=r)
        {
            if(!a[l+1])l++,ans--;
            else break;
        }
        if(ans<0)ans=0;
        cout<<ans<<endl;

    }///End TotalTests
}   ///End Main

提出情報

ジャッジ結果