Submission #621410

#	Time	Username	Problem	Language	Result	Execution time	Memory
621410		A_D	Sorting (IOI15_sorting)	C++14	16 / 100	4 ms	340 KiB

sorting

#include "sorting.h"
#include <bits/stdc++.h>
using namespace std;
const int N=2e5+100;
int a[N];
pair<int,int> b[N];
int n;
int num=0;


int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    num=0;
    n=N;
    for(int i=0;i<N;i++){
        a[i]=S[i];
        b[i]={a[i],i};
    }
    sort(b,b+n);
    for(int i=0;i<n;i++){
        a[b[i].second]=i;
    }
    if(n==1)return num;

    swap(a[0],a[1]);
    for(int i=0;i<n;i++){
        int f=0;
        for(int j=i+1;j<n;j++){
            if(a[j]==i){
                P[num]=i;
                Q[num]=j;
                swap(a[i],a[j]);
                num++;
                f=1;
                for(int h=0;h<n;h++){
                    if(a[h]!=h)f=0;
                }
                if(f)break;
                P[num]=0;
                Q[num]=0;
                num++;
            }

        }
        if(f)break;
    }
    return num;
}

Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:11:23: warning: declaration of 'N' shadows a global declaration [-Wshadow]
   11 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                   ~~~~^
sorting.cpp:4:11: note: shadowed declaration is here
    4 | const int N=2e5+100;
      |           ^
sorting.cpp:11:39: warning: unused parameter 'M' [-Wunused-parameter]
   11 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                   ~~~~^
sorting.cpp:11:46: warning: unused parameter 'X' [-Wunused-parameter]
   11 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                          ~~~~^~~
sorting.cpp:11:55: warning: unused parameter 'Y' [-Wunused-parameter]
   11 | 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: 16 / 16
• Subtask 4: 0 / 18
• Subtask 5: 0 / 20
• Subtask 6: 0 / 26