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c_cpp
a year ago
601 B
4
Indexable
#include <bits/stdc++.h> using i64 = long long; void solve() { int n; std::cin >> n; std::vector<int> a(n); for (int i = 0; i < n; i++) { std::cin >> a[i]; } auto it = std::min_element(a.begin(), a.end()); if (std::is_sorted(it, a.end())) { std::cout << it - a.begin() << "\n"; } else { std::cout << -1 << "\n"; } } int main() { std::ios::sync_with_stdio(false); std::cin.tie(nullptr); int t; std::cin >> t; while (t--) { solve(); } return 0; }
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