Submission #754572

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
754572	2023-06-08 05:57:37	Stickfish	Cat (info1cup19_cat)	C++17	36.25 / 100	901 ms	17064 KiB

cat

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#include <iostream>
#include <vector>
using namespace std;
vector<pair<int, int>> sort_ops(vector<int> p) {
    int n = p.size();
    vector<int> rp(n);
    for (int i = 0; i < n; ++i)
        rp[p[i]] = i;
    vector<pair<int, int>> ans;
    for (int t = 0; t < n; ++t) {
        if (p[t] == t)
            continue;
        int i = rp[t];
        ans.push_back({t, i});
        swap(p[i], p[t]);
        rp[p[t]] = t;
        rp[p[i]] = i;
    }
    return ans;
}
void solve() {
    int n;
    cin >> n;
    vector<int> p(n);
    for (int i = 0; i < n; ++i)
        cin >> p[i], --p[i];
    for (int i = 0; i < n; ++i) if (p[i] + p[n - i - 1] != n - 1) {
        cout << "-1\n";
 
 
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• Subtask 1: 2.25 / 15
• Subtask 2: 10 / 10
• Subtask 3: 3.75 / 25
• Subtask 4: 15 / 15
• Subtask 5: 5.25 / 35