Submission

----xxxxxx

Score: 0

User: Punnawith

Problemset: โชว์ของโลมา

Language: cpp

Time: 0.056 second

Submitted On: 2025-03-23 12:10:00

#include <iostream>
#include <vector>

using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int N;
    cin >> N;

    vector<vector<int>> board(N, vector<int>(N));
    int num = 1, row = 0, col = 0;
    
    int left = 0, right = N - 1, top = 0, bottom = N - 1;

    while (num <= N * N) {

        for (col = left; col <= right; col++) board[top][col] = num++;
        top++; 
        
        for (col = right, row = top; row <= bottom; row++) board[row][col] = num++;
        right--; 
        
        for (row = bottom, col = right; col >= left; col--) board[row][col] = num++;
        bottom--;
        
        for (row = bottom, col = left; row >= top; row--) board[row][col] = num++;
        left++; 
    }

    int sumLastDigits = 0;
    for (int i = 0; i < N; i++) {
        sumLastDigits += board[N - 1][i] % 10;
    }

    cout << sumLastDigits;
    return 0;
}