Submission #510221

#	Time	Username	Problem	Language	Result	Execution time	Memory
510221		M_sawas_	Nizin (COCI16_nizin)	C++17	0 / 100	48 ms	7936 KiB

nizin

#include <bits/stdc++.h>
#define ll long long
#define endl "\n"
using namespace std;
ll n,a[1000007],ans,l,r;
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i];
    }
    l=1,r=n;
    for(int i=0;i<n&&l<r;i++){
        if(a[l]==a[r]){
            l++,r--;
        }
        else if(a[l]<a[r]){
            if(a[l]+a[l+1]==a[r]){
                ans++;l+=2;r--;
            }
            else if(a[l]+a[l+1]==a[r]+a[r-1]){
                ans+=2;l+=2;r-=2;
            }
        }
        else if(a[l]>a[r]){
            if(a[r]+a[r-1]==a[l]){
                ans++;r-=2;l++;
            }
            else if(a[l]+a[l+1]==a[r]+a[r-1]){
                ans+=2;l+=2;r-=2;
            }
        }
    }
    cout<<ans;

    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
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• Subtask 9: 0 / 10
• Subtask 10: 0 / 10