#include #include #include using namespace std; using namespace atcoder; using mint = modint998244353; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf32 1000000001 #define Inf64 4000000000000000001 int main(){ int n; cin>>n; int sz = 2000; vector S(sz,string(sz,'#')); int x = 0,y = 0; int cur = 1; while(n!=1){ int A = n/2; int B = n-A; rep(_,cur){ rep(i,A+1){ rep(j,B+1){ S[x+i][y+j] = '.'; } } x += A; y += B+1; } cur *= 2; n = A; } S[x][y] = '.'; while(x!=sz-1){ x++; S[x][y] = '.'; } while(y!=sz-1){ y++; S[x][y] = '.'; } cout<