Submission #959444

#	Time	Username	Problem	Language	Result	Execution time	Memory
959444		NemanjaSo2005	Arranging Shoes (IOI19_shoes)	C++17	15 / 100	15 ms	3160 KiB

shoes

#include "shoes.h"
#include<bits/stdc++.h>
#define ll long long
using namespace std;
const int maxn=2e5+5;
ll N,niz[maxn];
ll res=0;
int prvalev(){
   for(int i=1;i<=N;i++)
      if(niz[i]<0)
         return i;
}
int parod(int x){
   for(int i=1;i<=N;i++)
      if(niz[i]==-x)
         return i;
}
void zamena(int y,int x){
   for(int i=y;i>x;i--){
      res++;
      swap(niz[i],niz[i-1]);
   }
}
ll count_swaps(vector<int> s) {
	N=s.size();
	N/=2;
	return N*(N-1)/2;
	for(int i=0;i<N;i++)
      niz[i+1]=s[i];
   for(int i=1;i<=N;i+=2){
      int pl=prvalev();
      zamena(pl,i);
      int pd=parod(niz[i]);
     // cout<<pl<<" "<<pd<<endl;
      zamena(pd,i+1);
      niz[i]=niz[i+1]=0;
   }
   return res;
}

Compilation message (stderr)

shoes.cpp: In function 'int prvalev()':
shoes.cpp:12:1: warning: control reaches end of non-void function [-Wreturn-type]
   12 | }
      | ^
shoes.cpp: In function 'int parod(int)':
shoes.cpp:17:1: warning: control reaches end of non-void function [-Wreturn-type]
   17 | }
      | ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 15 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 15