제출 #978767

#제출 시각아이디문제언어결과실행 시간메모리
978767bachhoangxuan철로 (IOI14_rail)C++17
100 / 100
52 ms920 KiB
#include "rail.h" #include<bits/stdc++.h> using namespace std; const int maxn=5e3+5; #define pii pair<int,int> #define fi first #define se second pii a[maxn]; void findLocation(int N, int S, int P[], int T[]) { map<int,int> mp; P[0]=S;T[0]=1; mp[S]=0; for(int i=1;i<N;i++) a[i]={getDistance(0,i),i}; sort(a+1,a+N); int l=0,r=a[1].se; P[r]=S+a[1].fi;T[r]=2; mp[P[r]]=r; for(int i=2;i<N;i++){ int x=a[i].se; int dl=getDistance(l,x),dr=getDistance(r,x); int m=(P[l]+dl+P[r]-dr)/2; T[x]=(mp.find(m)==mp.end()?(m>S?2:1):(T[mp[m]]^3)); if(T[x]==2){ P[x]=P[l]+dl; if(P[x]>P[r]) r=x; } else{ P[x]=P[r]-dr; if(P[x]<P[l]) l=x; } mp[P[x]]=x; } }
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