vc6.0(vc9)
#includevoid main(){ int m,a,b,c,d; for(m=1000;m<=9999;m++) { a=m/1000; b=(m-1000*a)/100; c=(m-1000*a-100*b)/10; d=m-1000*a-100*b-10*c; if(a==d&&b==c) { printf('%d\n',m); } }}