제출 #1290546

#제출 시각아이디문제언어결과실행 시간메모리
1290546mosnter777Autići (COCI22_autici)C++20
10 / 50
31 ms1188 KiB
#include<bits/stdc++.h> using namespace std; int main(){ long long n; cin>>n; vector<long long>a(n); long long sum=0; for(long long i=0;i<n;i++){ cin>>a[i]; sum+=a[i]; } long long cem=a[0]+a[n-1]; if(n!=1 && n!=2){ long long k=sum-cem; long long l=2*k; cout<<cem+l; } else if(n==1){ cout<<"0"<<endl; } else{ cout<<cem<<endl; } return 0; }
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