#include <iostream> using namespace std; int main() { int n=1000,npre=1000,g,s,b,q,nine; int ng,ns,nb,nq; while(npre<=9999) { n=npre; g=n%10; n=n/10; s=n%10; n=n/10; b=n%10; n=n/10; q=n%10; //g,s,b,q nine=9*npre; if(nine>=10000) break; ng=nine%10; nine=nine/10; ns=nine%10; nine=nine/10; ...