Submission #318033

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
318033	2020-10-31 09:32:47	wildturtle	Sorting (IOI15_sorting)	C++14	100 / 100	380 ms	25172 KiB

sorting

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#include <bits/stdc++.h>
#include "sorting.h"
using namespace std;
int a,le,ri,ans,mid;
int S1[500005],A[500005];
vector < pair < int , int > > v;
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    le=0; ri=M; ans=-1;
    while(le<=ri) {
        mid=(le+ri)/2;
        for(int i=0;i<N;i++)
        S1[i]=S[i];
        for(int i=0;i<mid;i++) {
            swap(S1[X[i]],S1[Y[i]]);
        }
        for(int i=0;i<N;i++) {
            A[S1[i]]=i;
        }
        v.clear();
        for(int i=0;i<N;i++) {
            if(S1[i]==i) continue;
            v.push_back({i,S1[i]});
            swap(S1[i],S1[A[i]]);
            swap(A[i],A[S1[A[i]]]);   
        }
        a=v.size();
        if(a<=mid) {
            for(int i=0;i<N;i++) {
                S1[i]=S[i];
                A[S1[i]]=i;
 
 
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Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:26:17: warning: conversion from 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   26 |         a=v.size();
      |           ~~~~~~^~

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