Submission #1090652

#	Time	Username	Problem	Language	Result	Execution time	Memory
1090652		owoovo	Sorting (IOI15_sorting)	C++17	0 / 100	2 ms	604 KiB

sorting

#include "sorting.h"

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
	int ans=0,vis[110]={0};
	for(int i=0;i<N;i++){
		if(vis[i]||S[i]==i)continue;
		int now=S[i];
		vis[i]=1;
		while(now!=i){
			ans++;
			vis[now]=1;
			if(now==0||now==1){
				P[ans-1]=now^(ans%2);
			}
			if(i==0||i==1){
				Q[ans-1]=now^(ans%2);
			}
			now=S[now];
		}
	}
	if(ans%2==1){
		P[ans]=0;
		Q[ans]=0;
		ans++;
	}
	return ans;
}

Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:3:39: warning: unused parameter 'M' [-Wunused-parameter]
    3 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                   ~~~~^
sorting.cpp:3:46: warning: unused parameter 'X' [-Wunused-parameter]
    3 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                          ~~~~^~~
sorting.cpp:3:55: warning: unused parameter 'Y' [-Wunused-parameter]
    3 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                                   ~~~~^~~

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