Submission #510074

#TimeUsernameProblemLanguageResultExecution timeMemory
510074M_sawas_Nizin (COCI16_nizin)C++17
0 / 100
164 ms7956 KiB
#include <bits/stdc++.h>
#define ll long long
#define endl "\n"
using namespace std;
ll n,a[1000007],ans;
int main()
{
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>a[i];
    }
    for(int i=0;i<n;i++){
        if(a[i]!=a[n-i-1]){
            if(a[i]+a[i+1]==a[n-i-1]){
                i++;
                ans++;
            }

            else if(a[i]+a[i+1]==a[n-i-1]+a[n-i-2]){
                i++;
                ans++;
            }
        }
    }
    cout<<ans;

    return 0;
}
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