Submission

Score: 100

User: erng

Problemset: ทางเชื่อม

Language: cpp

Time: 0.336 second

Submitted On: 2026-03-09 21:23:11

#include <bits/stdc++.h>

using namespace std;

#define ll long long

const ll nx=5005;
ll q, sz, mod=1e9+7;
char mp[2][nx];
ll dp[2][nx];

void solve()
{
    cin>>sz;
    for (int i=0; i<2; i++)
    {
        for (int j=1; j<=sz; j++)
        {
            cin>>mp[i][j];
            dp[i][j]=0;
        }
    }
    dp[0][0]=1;
    dp[1][0]=1;
    for (int i=1; i<=sz; i++)
    {
        if (mp[0][i]=='.' && mp[1][i]=='.') dp[0][i]=(dp[0][i-1]+dp[1][i-1])%mod, dp[1][i]=dp[0][i];
        else if (mp[0][i]=='#' && mp[1][i]=='.') dp[1][i]=dp[1][i-1], dp[0][i]=0;
        else if (mp[1][i]=='#' && mp[0][i]=='.') dp[0][i]=dp[0][i-1], dp[1][i]=0;
        else dp[0][i]=0, dp[1][i]=0;
    }
    cout<<(dp[0][sz]+dp[1][sz])%mod<<'\n';
}


int main()
{
    cin.tie(NULL)->sync_with_stdio(false);
    cin>>q;
    for (int i=1; i<=q; i++) solve();
}