Submission #1026391

#	Time	Username	Problem	Language	Result	Execution time	Memory
1026391		ezzzay	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

#include "shoes.h"
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
#define pb push_back
const int N=3e5+5;
int bit[N];
int a[N];
vector<int>v[N];
vector<int>ans;
int n;
int find(int idx){
    int s=0;
    while(idx>0){
        s+=bit[idx];
        idx-= idx & -idx;
    }
    return s;
}
void update(int idx, int val){
    while(idx<N){
        bit[idx]+=val;
        idx+= idx & -idx;
    }
}
int fun(){
    map<int,int>mp;
    for(int i=0;i<N;i++)bit[i]=0;
    for(int i=1;i<=n;i++){
        mp[a[i]];
    }
    int idx=1;
    for(auto it=mp.begin();it!=mp.end();it++){
        it->ss = idx++;
    }
    for(int i=1;i<=n;i++){
        a[i]=mp[a[i]];
    }
    int s=0;
    
    for(int i=1;i<=n;i++){
        update(a[i],1);
        s+=i-find(a[i]);
    }
    return s;
}
long long count_swaps(vector<int> s) {
    
    
    vector<int> p(s.size());
    vector<stack<int> > v(s.size()+s.size()+1);
    for(int i=s.size()-1; i>=0; i--){
        v[s[i]+s.size()].push(i);
    }
    for(int i=0,j=0; i<s.size(); i++){
        if(!v[s[i]+s.size()].empty()&&v[s[i]+s.size()].top()==i){
            if(s[i]<0){
                p[j]=i;
                j++;
                p[j++]=v[-s[i]+s.size()].top();
                v[s[i]+s.size()].pop();
                v[-s[i]+s.size()].pop();
            }else{
                p[j++]=v[-s[i]+s.size()].top();
                p[j]=i;
                v[s[i]+s.size()].pop();
                v[-s[i]+s.size()].pop();
                j++;
            }
        }
    }
    n=s.size();
   for(int i=0;i<n;i++){
       a[i+1]=p[i];
   }
    return fun();
    
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<long long int>)':
shoes.cpp:57:23: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |     for(int i=0,j=0; i<s.size(); i++){
      |                      ~^~~~~~~~~
/usr/bin/ld: /tmp/ccGCFjuv.o: in function `main':
grader.cpp:(.text.startup+0x29d): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status