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38
S2OJ/1550/1550.cpp
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38
S2OJ/1550/1550.cpp
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#include <iostream>
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#include <algorithm>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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const int N = 1e5 + 5;
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int n, a[N], c[N], p, ans;
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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cin >> n;
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bool flag = n >= 3;
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for (int i = 1; i <= n; i++) {
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cin >> a[i];
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if (a[i] == n) p = i;
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}
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flag &= a[1] == n - 1 && a[n] == n;
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for (int i = 1; i < p; i++) {
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if (a[i] > a[i + 1]) {
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ans++;
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std::swap(a[i], a[i + 1]);
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}
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}
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cout << static_cast<long long>(n) * (n - 1) + ans - flag << endl;
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return 0;
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}
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