Submission #155774

#TimeUsernameProblemLanguageResultExecution timeMemory
155774akobiArranging Shoes (IOI19_shoes)C++14
Compilation error
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; #define ll long long #define F first #define S second #define mp make_pair #define pb push_back #define N 100005 ll n,a[N],fix[N],ans,f[2*N]; pair< vector<ll>,ll > v1[N],v2[N]; void upd(ll u) { u++; while (u<=2*n) { f[u]++; u+=(u&(-u)); } return; } ll get(ll u,ll v) { v++; ll tans=0; while (v>0) { tans+=f[v]; v-=(v&(-v)); } while (u>0) { tans-=f[u]; u-=(u&(-u)); } return tans; } ll count_swaps(vector<ll> a) { n=a.size()/2; for (int i=0; i<2*n; i++) { if (a[i]<0) { v1[-a[i]].F.pb(i); if ( v2[-a[i]].F.size()-v2[-a[i]].S>0 ) { //cout<<i<<" "<<(v2[-a[i]].F)[ v2[-a[i]].S ]<<endl; fix[i]= (v2[-a[i]].F)[ v2[-a[i]].S ]; fix[ (v2[-a[i]].F)[ v2[-a[i]].S ] ] =(v2[-a[i]].F)[ v2[-a[i]].S ]; v1[-a[i]].S++; v2[-a[i]].S++; } } else { v2[a[i]].F.pb(i); if ( v1[a[i]].F.size()-v1[a[i]].S>0 ) { //cout<<i<<" "<<(v1[a[i]].F)[ v1[a[i]].S ]<<endl; fix[i]= (v1[a[i]].F)[ v1[a[i]].S ]; fix[ (v1[a[i]].F)[ v1[a[i]].S ] ] =(v1[a[i]].F)[ v1[a[i]].S ]; v2[a[i]].S++; v1[a[i]].S++; } } } for (int i=0; i<2*n; i++) { upd(fix[i]); if (i==fix[i]) continue; ans+=get(fix[i]+1,i); if (a[i]<a[fix[i]]) ans++; } return ans; //cout<<ans<<endl; }

Compilation message (stderr)

/tmp/ccuCGcIZ.o: In function `main':
grader.cpp:(.text.startup+0x272): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status