Submission #52613923

Source Code Expand

#include <iostream>
#include <vector>
#include <algorithm>
#include <set>

using namespace std;

int main() {
    long long N;
    cin >> N;
    vector<long long> A(N+1);
    vector<long long> B(N+1);
    for (long long i = 1; i <= N; ++i) {
        cin >> A[i];
        B[A[i]] = i;
    }

    long long count = 0;
    vector<pair<long long, long long>> operations;
    for (long long i = 1; i <= N; ++i) {
        if (i != A[i]) {
          count++;
          long long a = A[i];
          swap(A[B[i]], A[i]);
 				  operations.push_back(make_pair(i, B[i]));
          swap(B[a],B[i]);

        }
		}
    cout << count << endl;
    for (auto op : operations) {

        if (op.first < op.second){
					cout << op.first << " " << op.second << endl;
        } else {
					cout << op.second << " " << op.first << endl;
				}
    }

    return 0;
}

Submission Info

Submission Time
Task C - Sort
User arashin
Language C++ 20 (gcc 12.2)
Score 300
Code Size 889 Byte
Status AC
Exec Time 237 ms
Memory 10520 KiB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 300 / 300
Status
AC × 3
AC × 23
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt
All random_01.txt, random_02.txt, random_03.txt, random_04.txt, random_05.txt, random_06.txt, random_07.txt, random_08.txt, random_09.txt, random_10.txt, random_11.txt, random_12.txt, random_13.txt, random_14.txt, random_15.txt, random_16.txt, random_17.txt, random_18.txt, random_19.txt, random_20.txt, sample_01.txt, sample_02.txt, sample_03.txt
Case Name Status Exec Time Memory
random_01.txt AC 237 ms 10360 KiB
random_02.txt AC 195 ms 9956 KiB
random_03.txt AC 237 ms 10352 KiB
random_04.txt AC 23 ms 4080 KiB
random_05.txt AC 237 ms 10520 KiB
random_06.txt AC 141 ms 7008 KiB
random_07.txt AC 1 ms 3440 KiB
random_08.txt AC 1 ms 3444 KiB
random_09.txt AC 34 ms 6284 KiB
random_10.txt AC 23 ms 5304 KiB
random_11.txt AC 133 ms 8412 KiB
random_12.txt AC 50 ms 5340 KiB
random_13.txt AC 236 ms 10380 KiB
random_14.txt AC 69 ms 5092 KiB
random_15.txt AC 236 ms 10376 KiB
random_16.txt AC 141 ms 7012 KiB
random_17.txt AC 137 ms 8336 KiB
random_18.txt AC 13 ms 3788 KiB
random_19.txt AC 138 ms 8324 KiB
random_20.txt AC 43 ms 4724 KiB
sample_01.txt AC 1 ms 3504 KiB
sample_02.txt AC 1 ms 3496 KiB
sample_03.txt AC 1 ms 3496 KiB