C++题解

#include <iostream>
#include <algorithm>//因为要用到max()模块
using namespace std;

const int N = 1005;//可以写成1000 + 5

int a[N][N] = {0};

int main() {
    int n;
    cin >> n;

    for (int i = 0; i < n; ++i) {
        for (int j = 0; j <= i; ++j) {
            cin >> a[i][j];
        }
    }

    for (int i = n - 2; i >= 0; --i) {
        for (int j = 0; j <= i; ++j) {
            a[i][j] += max(a[i + 1][j], a[i + 1][j + 1]);
        }
    }

    cout << a[0][0] << endl;

    return 0;//好习惯
}