Järjestys

input/code.cpp: In function 'int main()':
input/code.cpp:35:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < r.size(); i++) cout << r[i] << " ";
                            ^
input/code.cpp:10:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
input/code.cpp:16:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &temp);
                     ^

#include <bits/stdc++.h>

using namespace std;

int main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	
	int n, temp;
	scanf("%d", &n);
	
	vector<int> v, r;
	int p[n];
	
	for(int i = 0; i < n; i++) {
		scanf("%d", &temp);
		v.push_back(temp);
		p[temp-1] = i;
	}
	
	for(int end = n; end > 1; end--) {
		for(int i = min(p[end-1], end-1); i >= 0; i--) {
			if(v[i] == end) {
				if(i > 0) r.push_back(i+1);
				r.push_back(end);
				if(end > 2) r.push_back(end-1);
				if(i > 1) r.push_back(i);
				v.erase(v.begin() + i);
				break;
			}
		}
	}
	
	cout << r.size() << endl;
	for(int i = 0; i < r.size(); i++) cout << r[i] << " ";
	cout << endl;
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: ACCEPTED