#include using namespace std; typedef signed long long ll; #define _P(...) (void)printf(__VA_ARGS__) #define FOR(x,to) for(x=0;x<(to);x++) #define FORR(x,arr) for(auto& x:arr) #define FORR2(x,y,arr) for(auto& [x,y]:arr) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) template bool chmax(T &a, const T &b) { if(a bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;} //------------------------------------------------------- int H,W,X; string S[1010]; void solve() { int i,j,k,l,r,x,y; string s; cin>>H>>W>>X; if(X%2) return _P("-1\n"); X-=(H-1)+(W-1); if(X<0) return _P("-1\n"); X/=2; if(W%4==1) { FOR(y,H) { S[y]=string(W,'#'); FOR(x,W) if(y==0||x%2==0) S[y][x]='.'; } for(x=1;x