Codeforces-SolutionsA/Codes/1534 A - Colour the Flag/1534A.cpp
2024-08-22 01:36:57 +06:00

83 lines
1.7 KiB
C++

#include <bits/stdc++.h>
using namespace std;
#ifdef ONLINE_JUDGE
#define dbg(...)
#else
#include "Assets/debug.h"
#endif
#define int long long
#define ll long long
#define endl '\n'
#define ff first
#define ss second
#define ins insert
#define pb push_back
#define ppb pop_back
#define sz(x) (int)(x).size()
#define all(x) x.begin(), x.end()
#define rep(i,a,b) for(int i=a; i<b; ++i)
#define rrep(i,a,b) for(int i=a; i>=b; --i)
#define yn(f) f? cout<<"YES\n":cout<<"NO\n"
#define FAST (ios_base::sync_with_stdio(false), cin.tie(nullptr));
ll pow(ll x,ll y,ll m=1e9+7) {ll ans=1;x%=m;while(y){if(y&1)ans=(ans*x)%m;x=(x*x)%m;y>>=1;}return ans;}
void solve()
{
int n,m;
cin>>n>>m;
vector<string> v1(n, string(m, 'W')), v2(n, string(m,'R'));
bool f1=1, f2=1;
rep(i,0,n)
{
rep(j,0,m)
{
if((i+j)&1)
{
v1[i][j]='R';
v2[i][j]='W';
}
char c;
cin>>c;
dbg(c);
if(c!='.')
{
if(c!=v1[i][j]) f1=0;
if(c!=v2[i][j]) f2=0;
}
}
}
dbg(f1,f2);
if(f1 || f2)
{
yn(1);
if(f1)
{
for(auto &s:v1)
{
for(auto &c:s) cout<<c;
cout<<endl;
}
}
else
{
for(auto &s:v2)
{
for(auto &c:s) cout<<c;
cout<<endl;
}
}
}
else yn(0);
}
signed main()
{
FAST;
int TCS = 1;
cin >> TCS;
for (int TC = 1; TC <= TCS; ++TC)
{
// cout<<"Case "<<TC<<": ";
solve();
}
}