#include #include #include using namespace std; char mat[1002][1002]; char mat2[1002][1002]; int n,m,h; int main() { freopen("in.txt","r",stdin); char c[1002]; scanf("%d %d %d",&n,&m,&h); for(int i=0;imat2[i][j]?mat2[i][j]:mat[i][j]; } for(int i=0;i