Problem-Solving/1680B at main · tamimsal/Problem-Solving · GitHub

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#include <bits/stdc++.h>
using namespace std;
#define int long long
#define debug(x) cout<<"[" << #x << " is:" << x << "] "<<endl;
#define endl '\n'
//By: Tamim


void solve() {
    int n,m;
    cin >> n >> m;
    char a[n][m];
    int l = 0,r = 0;
    bool f = false;
    bool ans = true;
    for(int i =0 ; i < n ; i++){
        for(int j = 0 ; j < m ; j++){
            cin >> a[i][j];
            if(a[i][j] == 'R' && !f){
                l = i,r = j;
                f = true;
            }
            else if(a[i][j] == 'R' && f){
                if(i < l || j < r){
                    ans = false;
                }
            }
        }
    }
    if(ans){
        cout << "YES" << endl;
    }
    else{
        cout << "NO" << endl;
    }


}

int32_t main() {

    ios::sync_with_stdio(false);cin.tie(0);
    cout.tie(0);
    int t =1 ;
    cin >>t;
    while (t--) {
        solve();
    }


    return 0;
}