Submission #288736

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
288736	2020-09-01 19:51:09	b00n0rp	Sorting (IOI15_sorting)	C++17	100 / 100	356 ms	17584 KiB

sorting

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#include "sorting.h"
#include<bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define F first
#define S second
#define vi vector<int>
#define pb push_back
#define SZ(v) (int)v.size()
const int MAXN = 200005;
int a[MAXN],b[MAXN];
int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    int low = 0,high = M,mid,ans;
    while(low <= high){
      mid = (low+high)/2;
      vector<pii> v;
      for(int i = 0; i < N; i ++) a[i] = S[i];
      for(int i = 0; i < mid; i ++){
        swap(a[X[i]],a[Y[i]]);
      }
      for(int i = 0; i < N; i ++) b[a[i]] = i;
      for(int i = 0; i < N; i ++){
        if(a[i] == i) continue;
        int pos = b[i];
 
 
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Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:66:12: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   66 |     return ans;
      |            ^~~

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