Submission

Score: 50

User: nemuchannnUwU

Problemset: โชว์ของโลมา

Language: cpp

Time: 0.008 second

Submitted On: 2026-03-11 16:12:59

#include<bits/stdc++.h>
#define int long long
using namespace std;
main(){
	int n;
	cin >> n;
	if (n==1){
		cout << 1;
		return 0;
	}if (n==2){
		cout << 7;
		return 0;
	}if (n==3){
		cout << 24;
		return 0;
	}
	int ans=0;
	int nn=n*n;
	if (n%2){
		ans+=nn%10;
		nn--;
		ans+=nn%10;
		nn--;
		ans+=nn%10;
		int k=-9;
		for (int i=0;i<n-3;i++){
			if (i%2==0){
				nn+=k;
				ans+=nn%10;
				k-=8;
			}else{
				nn--;
				ans+=nn%10;
			}
			cout << nn << " ";
		}
	}else{
		ans+=nn%10;
		ans+=(nn-1)%10;
		int k=-5;
		for (int i=0;i<n-2;i++){
			if (i%2==0){
				nn+=k;
				ans+=nn%10;
				k-=8;
			}else{
				nn--;
				ans+=nn%10;
			}
//			cout << nn << " ";
		}
	}
	cout << ans << " ";
}