南阳理工OJ_题目18 The Triangle

#include <iostream>

using namespace std;

int a[110][110];
int d[110][110];

int main()
{
    int n;
    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++)
            d[i][j] = (d[i+1][j] > d[i+1][j+1] ? d[i+1][j] : d[i+1][j+1]) + a[i][j];

    cout << d[1][1] << endl;
}