2009年信息学奥赛(我是高一的)的四道题目及解法答:4、靶形数独program d_1;var usei,usej,usex:array[0..10,0..10] of boolean; usep:array[0..100] of boolean; maxi,a:array[0..10,0..10] of longint; t,s,max,tot,i,j,k,n,m,p:longint; x,y:array[0..100] of longint;function solve(i,J:longint):longint; var s,s1:...