Language: C++

#include "bits/stdc++.h"
using namespace std;

//諸機能
#pragma region MACRO 
#define putans(x)  std::cerr << "[ answer ]: " ; cout << (x) << endl
#define dputans(x) std::cerr << "[ answer ]: "; cout << setprecision(27) << (double)(x) << endl
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define RREP(i,a,n) for(int i=(int)(n-1); i>= a; i--)
#define rep(i,n) REP(i,0,n)
#define rrep(i,n) RREP(i,0,n)
#define all(a) begin((a)),end((a))
#define mp make_pair
#define exist(container, n) ((container).find((n)) != (container).end())
#define equals(a,b) (fabs((a)-(b)) < EPS)
#ifdef _DEBUG //ファイルからテストデータを読み込む
std::ifstream ifs("data.txt");
#define put ifs >>
#else //ジャッジシステムでいい感じにやる
#define put cin >>
#endif
#pragma endregion
//デバッグなどの支援
#pragma region CODING_SUPPORT
#ifdef _DEBUG
#define dbg(var0) { std::cerr << ( #var0 ) << "=" << ( var0 ) << endl; }
#define dbg2(var0, var1) { std::cerr << ( #var0 ) << "=" << ( var0 ) << ", "; dbg(var1); }
#define dbg3(var0, var1, var2) { std::cerr << ( #var0 ) << "=" << ( var0 ) << ", "; dbg2(var1, var2); }
#define dbgArray(a,n) {std::cerr << (#a) << "=";  rep(i,n){std::cerr <<(a[i])<<",";} cerr<<endl;} 
#else
#define dbg(var0) {}
#define dbg2(var0, var1) {}
#define dbg3(var0, var1, var2) {}
#define dbgArray(a,n) {}
#endif 
#pragma endregion 
//typedef（書き換える、書き足す可能性ある）
#pragma region TYPE_DEF
typedef long long ll;
typedef pair<int, int> pii; typedef pair<string, string> pss; typedef pair<int, string>pis;
typedef vector<string> vs; typedef vector<int> vi;
#pragma endregion
//諸々の定数(書き換える可能性ある)
#pragma region CONST_VAL
#define PI (2*acos(0.0))
#define EPS (1e-10)
#define MOD (ll)(1e9 + 7)
#define INF (ll)(2*1e9)
#pragma endregion



int main() {
	int n; put n;
	vi t(n); rep(i, n) put t[i];
	vi a(n); rep(i, n) put a[n-1-i];
	ll ans = 1;
	vi mint(n);
	vi maxt(n);
	mint[0] = t[0];
	maxt[0] = t[0];
	vi mina(n);
	vi maxa(n);
	mina[0] = a[0];
	maxa[0] = a[0];

	if (n == 1) {
		if(t[0] == a[0])putans(1);
		else putans(0);
		goto END;
	}

	rep(i, n-1) {
		if (t[i + 1] != t[i]) {
			mint[i + 1] = t[i + 1];
			maxt[i + 1] = t[i + 1];
		}
		else {
			mint[i + 1] = 1;
			maxt[i + 1] = t[i + 1];
		}
	}
	rep(i, n - 1) {
		if (a[i + 1] != a[i]) {
			mina[i + 1] = a[i + 1];
			maxa[i + 1] = a[i + 1];
		}
		else {
			mina[i + 1] = 1;
			maxa[i + 1] = a[i + 1];
		}
	}
	rep(i, n) {
		ll x = min(maxa[i], maxt[n - 1 - i]);
		ll y = max(mina[i], mint[n - 1 - i]);
		dbg2(x, y);
		if (x < y) {
			putans(0);
			goto END;
		}
		ans = ( ans* ( x - y + 1 )) % MOD;
	} 
	putans(ans);

END: 
	return 0;
}



//
//vi v;
//vi w; ;
//ll nz1() {
//	return 0;
//}
//
//ll nz2() {
//	ll dp[201][1000*200+1];
//
//}
//
//ll nz3() {
//
//}
//	int n, wkazu; put n >> wkazu;
//	v.resize(200); 
//	w.resize(200);
//	rep(i, n) {
//		put v[i] >> w[i];
//	}

Compiler output:
a.cc: In function 'int main()':
a.cc:69:17: error: expected '}' before 'else'
   69 |                 else putans(0);
      |                 ^~~~
a.cc:67:21: note: to match this '{'
   67 |         if (n == 1) {
      |                     ^
a.cc:70:22: error: label 'END' used but not defined
   70 |                 goto END;
      |                      ^~~
a.cc: At global scope:
a.cc:8:20: error: expected unqualified-id before 'for'
    8 | #define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
      |                    ^~~
a.cc:10:18: note: in expansion of macro 'REP'
   10 | #define rep(i,n) REP(i,0,n)
      |                  ^~~
a.cc:73:9: note: in expansion of macro 'rep'
   73 |         rep(i, n-1) {
      |         ^~~
a.cc:73:13: error: 'i' does not name a type; did you mean 'vi'?
   73 |         rep(i, n-1) {
      |             ^
a.cc:8:35: note: in definition of macro 'REP'
    8 | #define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
      |                                   ^
a.cc:73:9: note: in expansion of macro 'rep'
   73 |         rep(i, n-1) {
      |         ^~~
a.cc:73:13: error: 'i' does not name a type; did you mean 'vi'?
   73 |         rep(i, n-1) {
      |             ^
a.cc:8:47: note: in definition of macro 'REP'
    8 | #define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
      |                                               ^
a.cc:73:9: note: in expansion of macro 'rep'
   73 |         rep(i, n-1) {
      |         ^~~
a.cc:8:20: error: expected unqualified-id before 'for'
    8 | #define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
      |                    ^~~
a.cc:10:18: note: in expansion of macro 'REP'
   10 | #define rep(i,n) REP(i,0,n)
      |                  ^~~
a.cc:83:9: note: in expansion of macro 'rep'
   83 |         rep(i, n - 1) {
      |         ^~~
a.cc:83:13: error: 'i' does not name a type; did you mean 'vi'?
   83 |         rep(i, n - 1) {
      |             ^
a.cc:8:35: note: in definition of macro 'REP'
    8 | #define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
      |                                   ^
a.cc:83:9: note: in expansion of macro 'rep'
   83 |         rep(i, n - 1) {
      |         ^~~
a.cc:83:13: error: 'i' does not name a type; did you mean 'vi'?
   83 |         rep(i, n - 1) {
      |             ^
a.cc:8:47: note: in definition of macro 'REP'
    8 | #define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
      |                                               ^
a.cc:83:9: note: in expansion of macro 'rep'
   83 |         rep(i, n - 1) {
      |         ^~~
a.cc:8:20: error: expected unqualified-id before 'for'
    8 | #define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
      |                    ^~~
a.cc:10:18: note: in expansion of macro 'REP'
   10 | #define rep(i,n) REP(i,0,n)
      |                  ^~~
a.cc:93:9: note: in expansion of macro 'rep'
   93 |         rep(i, n) {
      |         ^~~
a.cc:93:13: error: 'i' does not name a type; did you mean 'vi'?
   93 |         rep(i, n) {
      |             ^
a.cc:8:35: note: in definition of macro 'REP'
    8 | #define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
      |                                   ^
a.cc:93:9: note: in expansion of macro 'rep'
   93 |         rep(i, n) {
      |         ^~~
a.cc:93:13: error: 'i' does not name a type; did you mean 'vi'?
   93 |         rep(i, n) {
      |             ^
a.cc:8:47: note: in definition of macro 'REP'
    8 | #define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
      |                                               ^
a.cc:93:9: note: in expansion of macro 'rep'
   93 |         rep(i, n) {
      |         ^~~
a.cc:6:25: error: 'cerr' in namespace 'std' does not name a type
    6 | #define putans(x)  std::cerr << "[ answer ]: " ; cout << (x) << endl
      |                         ^~~~
a.cc:103:9: note: in expansion of macro 'putans'
  103 |         putans(ans);
      |         ^~~~~~
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:64:18: note: 'std::cerr' declared here
   64 |   extern ostream cerr;          ///< Linked to standard error (unbuffered)
      |                  ^~~~
a.cc:6:50: error: 'cout' does not name a type
    6 | #define putans(x)  std::cerr << "[ answer ]: " ; cout << (x) << endl
      |                                                  ^~~~
a.cc:103:9: note: in expansion of macro 'putans'
  103 |         putans(ans);
      |         ^~~~~~
a.cc:105:1: error: 'END' does not name a type
  105 | END:
      | ^~~
a.cc:107:1: error: expected declaration before '}' token
  107 | }
      | ^