제출 #1011193

#제출 시각아이디문제언어결과실행 시간메모리
1011193MardonbekhazratovArranging Shoes (IOI19_shoes)C++17
10 / 100
1 ms604 KiB
#include "shoes.h" #include<bits/stdc++.h> using namespace std; struct SegTree{ int N; const int NEU=0; vector<int>tree; int merge(int a,int b){ return a+b; } SegTree(int n){ N=1; while(N<n) N<<=1; tree.assign(N<<1,NEU); } void update(int v,int l,int r,int id,int x){ if(l>id || id>=r) return; if(r-l==1){ tree[v]+=x; return; } int mid=(l+r)>>1; update(v<<1,l,mid,id,x); update(v<<1|1,mid,r,id,x); tree[v]=merge(tree[v<<1],tree[v<<1|1]); } void update(int id,int x){ return update(1,0,N,id,x); } int get(int v,int l,int r,int ql,int qr){ if(l>=qr || ql>=r) return NEU; if(l>=ql && qr>=r) return tree[v]; int mid=(l+r)>>1; int a=get(v<<1,l,mid,ql,qr); int b=get(v<<1|1,mid,r,ql,qr); return merge(a,b); } int get(int l,int r){ if(r<=l) return 0; return get(1,0,N,l,r); } }; long long count_swaps(vector<int> s) { int n=s.size(); map<int,vector<int>>last; long long ans=0; SegTree S(n+1); for(int i=0;i<n;i++){ if(last[-s[i]].size()>0){ ans+=S.get(last[-s[i]].back()+1,i+1)+(s[i]<0); S.update(last[-s[i]].back(),1); last[-s[i]].pop_back(); } else{ last[s[i]].push_back(i+1); S.update(i+1,1); } } return ans; } // 2 //-1 1 2 -2
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...
#Verdict Execution timeMemoryGrader output
Fetching results...