제출 #137832

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
137832	2019-07-28 10:37:06	dolphingarlic	정렬하기 (IOI15_sorting)	C++14	100 / 100	651 ms	28280 KiB

sorting

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#include "sorting.h"
#include <bits/stdc++.h>
#define mid (l+r)/2
using namespace std;
const int inf = 6e5+9;
int n,m,x[inf],y[inf],a[inf],pos[inf],from[inf],origin[inf],posfrom[inf];
 
bool check(int i,int p[],int q[]){
 
        int l = 0,notvalid = 0;
        for(int j=0;j<n;j++){
            from[j] = j;
            a[j] = origin[j];
            p[j] = q[j] = 0;
            pos[ a[j] ] = j;
            posfrom[ from[j] ] = j;
            notvalid += (a[j] != j);
        }
        //cout<<i<<" "<<notvalid<<endl;
         for(int j=i;j>=0;j--){
            swap(posfrom[ from[ x[j] ] ] , posfrom[ from[ y[j] ] ]);
            swap( from[ x[j] ] , from[ y[j] ] );
        }
 
        for(int j=0;j<=i;j++){
 
            swap(pos[ a[ x[j] ] ] , pos[ a[ y[j] ] ]);
            swap(posfrom[ from[ x[j] ] ] , posfrom[ from[ y[j] ] ]);
 
            notvalid -= (a[ x[j] ] != x[j]) + (a[ y[j] ] != y[j]);
 
 
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