Language: C++

#include<iostream>
#include<algorithm>
#include<string>
#include<vector>
#include<cmath>
#include<map>
#include<iomanip>
#include<queue>
#include<stack>
#include<time.h>
#define rep(i,n)for(int i=0;i<n;i++)
#define int long long
#define ggr getchar();getchar();return 0;
#define prique priority_queue
#define mod 1000000007
#define inf 1e15
#define key 1e9
using namespace std;
typedef pair<int, int>P;
void yes() { cout << "Yay!" << endl; }
void no() { cout << ":(" << endl; }
template<class T> inline void chmax(T& a, T b) {
	a = std::max(a, b);
}
template<class T> inline void chmin(T& a, T b) {
	a = std::min(a, b);
}
const int MAX = 330000;
int fac[MAX], finv[MAX], inv[MAX];
// テーブルを作る前処理
void COMinit() {
	fac[0] = fac[1] = 1;
	finv[0] = finv[1] = 1;
	inv[1] = 1;
	for (int i = 2; i < MAX; i++) {
		fac[i] = fac[i - 1] * i % mod;
		inv[i] = mod - inv[mod % i] * (mod / i) % mod;
		finv[i] = finv[i - 1] * inv[i] % mod;
	}
}

// 二項係数計算
long long COMB(int n, int k) {
	if (n < k) return 0;
	if (n < 0 || k < 0) return 0;
	return fac[n] * (finv[k] * finv[n - k] % mod) % mod;
}
bool prime(int n) {
	int cnt = 0;
	for (int i = 1; i <= sqrt(n); i++) {
		if (n % i == 0)cnt++;
	}
	if (cnt != 1)return false;
	else return n != 1;
}
int gcd(int x, int y) {
	if (y == 0)return x;
	return gcd(y, x % y);
}
int lcm(int x, int y) {
	return x / gcd(x, y) * y;
}
int kai(int x, int y) {
	int res = 1;
	for (int i = x - y + 1; i <= x; i++) {
		res *= i; res %= mod;
	}
	return res;
}
int mod_pow(int x, int y, int m) {
	int res = 1;
	while (y) {
		if (y & 1) {
			res = res * x % m;
		}
		x = x * x % m;
		y >>= 1;
	}
	return res;
}
int comb(int x, int y) {
	if (y > x)return 0;
	return kai(x, y)* mod_pow(kai(y, y), mod - 2, mod) % mod;
}
void debug_out() { cerr << endl; }

template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
	cerr << " " << to_string(H);
	debug_out(T...);
}

#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
struct edge { int to, cost; };
int par[114514], rrank[114514];//親、木の深さ
void init(int n) {
	rep(i, n) {
		par[i] = i;
		rrank[i] = 0;
	}
}
int find(int x) {
	if (par[x] == x) {
		return x;
	}
	else return par[x] = find(par[x]);
}
void unite(int x, int y) {
	x = find(x);
	y = find(y);
	if (x == y)return;
	if (rrank[x] < rrank[y]) {
		par[x] = y;
	}
	else {
		par[y] = x;
		if (rrank[x] == rrank[y])rrank[x]++;
	}
}
bool same(int x, int y) {
	return find(x) == find(y);
}
int keta(int x) {
	int ans = 0, n = 1;
	while (n <= x) {
		ans++;
		n *= 10;
	}
	return ans;
}
int n;
int a[12222];
int b[12222];
int l[12222];
signed main() {
	cin >> n;
	rep(i, n)cin >> a[i];
	l[0] = a[0];
	l[1] = lcm(a[0], a[1]) / a[0];
	for (int i = 2; i < n; i++) {
		int p = 1;
		for (int j = 0; j < i; j++) {
          int y=a[i];
          y=y/gcd(y,a[j]);
		}
		l[i] = y;
	}
	rep(i, n) {
		int memo[12222];
		rep(j, n)memo[j] = l[j];
		rep(j, n) {
			int t = memo[j];
			memo[j] = memo[j] / gcd(a[i], memo[j]);
			a[i] = a[i] / gcd(a[i], t);
		}
		int q = 1;
		rep(j, n) {
			q *= memo[j];
			q %= mod;
		}
		b[i] = q % mod;
	}
	int ans = 0;
	rep(i, n) {
		ans += b[i];
		ans %= mod;
	}
	cout << ans % mod << endl;
	ggr
}


Compiler output:
a.cc: In function 'int main()':
a.cc:146:24: error: 'y' was not declared in this scope
  146 |                 l[i] = y;
      |                        ^