enjoyXW的博客 ... int a[5]; scanf("%d%d%d%d", &a[1], &a[2], &a[3], &a[4]); int used[5] = {0}; int i, j, k, m; for(i = 1; i { used[i]++; for(j = 1; j { used[j]++;
彩云的笔记的博客python def f(n): x = [ [e] for e in range(3)] if n==1: return x r = [] for i in x: for j in f(n-1): # print('34===j,i',j,i) j.append(i[0]) r.append(j) return r # print(f(1)) rr = .