#include const int maxn=10; int n, T; bool col[maxn + 1], dplus[maxn * 2 + 1], dminus[maxn * 2 + 1]; void queen(int row){ for(int i=1; i<=n; i++) if(!col[i] && !dplus[i+row] && !dminus[i-row+n]){ col[i] = dplus[i+row]= dminus[i-row+n]=true; if(row