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- #include <iostream>
- #include <vector>
- #include <algorithm>
- using namespace std;
- int main() {
- ios_base::sync_with_stdio(false);
- int n;
- cin >> n;
- vector<int> v(n + 1), next_value(n + 1);
- vector<pair<int, int> > v2;
- for(int i = 1; i <= n; i++) {
- cin >> v[i];
- v2.push_back(make_pair(v[i], i));
- if(v[i] > 1) {
- next_value[v[i] - 1] = i;
- }
- }
- sort(v2.begin(), v2.end());
- int rounds = 1;
- for(int i = 1; i < n; i++) {
- if(next_value[i] < v2[i - 1].second) {
- ++rounds;
- }
- }
- cout << rounds << endl;
- return 0;
- }
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