组合数

2020-11-01 本文已影响0人来到了没有知识的荒原

for (i = c[0][0] = 1; i <= n; i++)
    for (j = c[i][0] = 1; j <= i; j++)
        c[i][j] = c[i - 1][j] + c[i - 1][j - 1];