Submission #94882

#TimeUsernameProblemLanguageResultExecution timeMemory
94882karlopuhPismo (COCI18_pismo)C++14
0 / 70
1077 ms2424 KiB
#include <bits/stdc++.h> using namespace std; pair <int,int> stablo [300000]; int n; int pot=1; int mini = 1e9 + 10; int pom[2]; int query(int cvor,int od,int doo,int a,int b){ if(od<=a && doo>=b)return cvor; int rj1=-1,rj2=-1; if((doo+od)/2>=a){ rj1=query(cvor*2,od,(doo+od)/2,a,b); } if((doo+od)/2+1<=b){ rj2=query(cvor*2+1,(doo+od)/2+1,doo,a,b); } if(rj1==-1)return rj2; else if(rj2==-1) return rj1; else{ pom[0]=rj1; pom[1]=rj2; return -1; } } void create(){ for(int i=pot-1;i>=1;i--){ stablo[i].first=min(stablo[i*2].first,stablo[i*2+1].first); stablo[i].second=max(stablo[i*2].second,stablo[i*2+1].second); } } int main(){ cin>>n; for(;pot<=n;pot*=2); for(int i=0;i<n;i++){ cin>>stablo[pot+i].first; stablo[pot+i].second=stablo[pot+i].first; } for(int i=pot+n;i<=pot*2-1;i++){ stablo[i].first=1e9+10; stablo[i].second=-1e9+10; } create(); for(int i=0;i<n;i++){ for(int j=i+1;j<n;j++){ int pov=query(1,0,pot,i,j); if(pov==-1){ int test=max(stablo[pom[0]].second,stablo[pom[1]].second)-min(stablo[pom[0]].first,stablo[pom[1]].first); if(test<mini)mini=test; }else{ int test=stablo[pov].second-stablo[pov].first; if(test<mini)mini=test; } } } cout<<mini; }
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