View Code of Problem 4055

#include<iostream>
using namespace std;
int n;
const int N = 1010;
int a[N][N];
int main()
{
    cin >> n;
    for(int i = 1;i <= n;i ++)
        for(int j = 1;j <= i;j ++)
            cin >> a[i][j];
    for(int i = n;i >= 1;i --)
        for(int j = 1;j <= i;j ++)
            a[i][j] += max(a[i + 1][j],a[i + 1][j + 1]);
            
    cout << a[1][1] << endl;
}