#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
#define all(x) (x).begin(),(x).end()
#define X first
#define Y second
#define sep ' '
#define endl '\n'
#define debug(x) cerr << #x << ": " << x << endl;
const ll MAXN = 1e6 + 10;
const ll MOD = 1e9 + 7;
int n, A[MAXN];
ll dp[MAXN];
int main() {
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
cin >> n;
dp[0] = 1;
ll s = 0;
for (int i = 1; i <= n; i++) {
cin >> A[i] >> A[i];
for (int j = 0; j < i; j++)
if (A[j] < A[i])
dp[i] += dp[j];
dp[i] %= MOD;
s += dp[i];
}
cout << s % MOD << endl;
return 0;
}
