Submission #131148

#	Time	Username	Problem	Language	Result	Execution time	Memory
131148		youssefbou62	Hacker (BOI15_hac)	C++14	20 / 100	203 ms	6392 KiB

hac

#include  <bits/stdc++.h>

using namespace std;

#define mp make_pair
#define fi first
#define se second
#define all(v) v.begin(),v.end()
#define allarr(a) a , a + n
#define ll long long
#define ull unsigned long long 
#define pb push_back
#define fastio ios_base::sync_with_stdio(false) ; cin.tie(NULL); cout.tie(NULL)
typedef pair<int, int> pi;
typedef pair<ll,ll> pll; 
typedef pair<int,pi> trp ;
typedef vector<pi> vpi;
typedef vector<pll> vpll ;
// int ab  (int  x ) { return (x>0?x:-x); }

const int N = 500005 ;
int a[N] , pref[N],n; 

int sum(int l , int r ){
	if( l > r )return 0; 
	if( l == 0 )return pref[r]; 
	return pref[r]-pref[l-1] ; 
}

int main(){
cin >> n ; 
for(int i= 0 ;  i< n ; i++ )cin >> a[i] ; 
pref[0] = a[0] ; 
for(int i =  1 ; i < n ; i++ ){
	pref[i] = pref[i-1] + a[i] ; 
}
int ans = 1e9; 
for(int start = 0 ; start < (n/2)+(n%2) ; start ++ ){
	int s = sum(0,start)  ; 
	int res = (n/2+n%2)-start-1;
	// cout << start << " " << n-1-res << endl; 
	s += sum(n-res,n-1); 
	ans = min(ans,s); 
}
cout << ans << endl; 
}

• Subtask 1: 0 / 20
• Subtask 2: 0 / 20
• Subtask 3: 20 / 20
• Subtask 4: 0 / 40