This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
typedef long long ll;
using namespace std;
const ll MOD = 1e9 + 7;
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
int n;
cin >> n;
vector<ll> nums(n), sums(n);
for(int i = 0; i < n; i++) {
cin >> nums[i];
cin >> nums[i];
sums[i] = 1;
}
for(int i = 1; i < n; i++) {
for(int j = 0; j < i; j++) {
if(nums[j] < nums[i]) sums[i] += sums[j];
sums[i] %= MOD;
}
}
ll ans = 0;
for(int i = 0; i < n; i++) ans += sums[i];
cout << ans % MOD << '\n';
}
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