5位数=2*四位数，9个数字互不相同

代码 #include<stdio.h> #include<stdlib.h> int main() { int a, b, c, d, i, j, F = 0, E = 0, E1 = 0, t; for (a = 5; a <= 9; a++) { for (b = 0; b <= 9; b++) { for (c = 0; c <= 9; c++) { f

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