Submission #428009

#	Time	Username	Problem	Language	Result	Execution time	Memory
428009		haxorman	Sorting (IOI15_sorting)	C++14	20 / 100	284 ms	360 KiB

sorting

#include "sorting.h"
#include "bits/stdc++.h"
using namespace std;

const int mxN = 2e5 + 7;

int n, m, arr[mxN];

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
	n = N, m = M;

	for (int i = 0; i < n; ++i) {
		arr[i] = S[i];
	}
	sort(S, S + n);

	int R = 0, ind = 0;
	bool subtask_3 = (Y[ind] != 0);

	int start = 0;
	if (subtask_3) {
		swap(arr[0], arr[1]);
		for (int i = 0; i < 2; ++i) {
			for (int j = 0; j < n; ++j) {
				if (arr[j] == S[i] && j != 1) {
					swap(arr[j], arr[1]);
					P[ind] = j, Q[ind] = 1;
					++R;
					++ind;
					break;
				}
			}
		}
		start = 2;
	}


	for (int iter = 1; iter <= 50; ++iter) {
		for (int i = start; i < n; ++i) {
			for (int j = 0; j < n; ++j) {
				if (arr[j] == S[i] && i != j) {
					swap(arr[j], arr[i]);
					P[ind] = j, Q[ind] = i;
					++R;
					++ind;
					break;
				}
			}
		}
		swap(arr[X[ind]], arr[Y[ind]]);
	}

	if (subtask_3) {
		for (int i = 1; i < R; ++i) {
			swap(arr[0], arr[1]);
		}
	}

	if (arr[0] != 0) {
		P[ind] = 0, Q[ind] = 1;
		++R;
		++ind; 
	}

	return R;
}

• Subtask 1: 8 / 8
• Subtask 2: 12 / 12
• Subtask 3: 0 / 16
• Subtask 4: 0 / 18
• Subtask 5: 0 / 20
• Subtask 6: 0 / 26