我的三维DP怎么会WA，MLE可以理解，

#include<iostream>

using namespace std;

const int N = 1e2 + 10;

int f[N][N][N * N], a[N][N], n, m, k, res;

int main()
{
    freopen("C:\\Users\\HP\\Desktop\\P5662_10.in", "r", stdin);
    cin >> n >> m >> k;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            cin >> a[i][j];
        }
    }
    int tem = 0;
    for (int i = 1; i < n; i++) {
        //memset(f, 0, sizeof f);
        for (int j = 1; j <= m; j++) {
            for (int p = a[i][j]; p <= k; p++) {
                f[i][j][p] = max(f[i][j][p], f[i][j-1][p]);
                f[i][j][p] = max(f[i][j][p], f[i][j][p - a[i][j]] + a[i + 1][j] - a[i][j]);
                tem = max(tem, f[i][j][p]);
            }
        }
        k += tem;
        tem = 0;
    }
    res = k;
    cout << res << endl;

    return 0;
}