Submission #1688815

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Source Code Expand

#include<bits/stdc++.h>
#define vi vector<int>
#define vvi vector<vector<int> >
#define vl vector<ll>
#define vvl vector<vector<ll>>
#define vb vector<bool>
#define vc vector<char>
#define vs vector<string>
using ll = long long;
using ld =long double;
#define int ll
#define INF 1e9
#define EPS 0.0000000001
#define rep(i,n) for(int i=0;i<n;i++)
#define loop(i,s,n) for(int i=s;i<n;i++)
#define all(in) in.begin(), in.end()
template<class T, class S> void cmin(T &a, const S &b) { if (a > b)a = b; }
template<class T, class S> void cmax(T &a, const S &b) { if (a < b)a = b; }
#define MAX 9999999
using namespace std;
typedef pair<int, int> pii;
typedef pair<int,pii> piii;
signed main()
{
    int n; cin>>n;
    vector<int>v(n);
    vector<int>u(n);
    rep(i,n)cin>>v[i];
    rep(i,n)cin>>u[i];
    vector<bool>def(n,false);
    if(v[n-1]!=u[0])return puts("0")*0;
    def[0]=def[n-1]=true;
    for(int i=0; i<n;i++){
        if(i==0)continue;
        if(v[i-1]!=v[i])def[i]=true;
    }
    for(int i=n-1; i>=0;i--){
        if(i==n-1)continue;
        if(u[i]!=u[i+1])def[i]=true;
    }
    
    int ans=1;
    int MOD=INF+7;
    for(int i=0;i<n;i++){
        if(def[i])continue;
        ans*=min(v[i],u[i]);
        ans%=MOD;
    }
    cout<<ans%MOD<<endl;
}

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