#include <iostream>
#include <vector>
using namespace std;

const int MOD = 1e9 + 7;

// % x
// < x

int main() {
    vector<long long> arra;
    vector<long long> sum;
    int n, x;

    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> x >> x;
        arra.push_back(x);
    }

    for (int i = 0; i < n; i++) {
        sum.push_back(1);
        for (int j = i; j >= 0; j--)
            if (arra[i] > arra[j])
                sum[i] = (sum[i] + sum[j]) % MOD;
    }
    long long s = 0;
    for (int i = 0; i < n; i++)
        s = (s + sum[i]) % MOD;
    cout << s << endl;
    return 0;
}