# | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
---|---|---|---|---|---|---|---|
498153 | EliteCallsYou | 수열 (APIO14_sequence) | C++17 | 2083 ms | 2508 KiB |
이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
# include <bits/stdc++.h>
using namespace std ;
//############################################################################
# define read(a)/**/for(int i=0;i<int(sizeof(a)/sizeof(a[0]));i++){cin>>a[i];}
# define print(x)/**/for(auto zx:x){cout<<zx<<' ';}
const char* tochar(string a){return a.c_str();}
void files(){freopen("hopscotch.in","r",stdin);freopen("hopscotch.out","w",stdout);}
void speed(){ios_base::sync_with_stdio(false);cin.tie(0);}
long long gcd(long long a,long long b){if(!b){return a;}a%=b;return gcd(b,a);}
long long lcm(long long a,long long b){return a /gcd(a,b) * b;}
//###########################################################################
const int N = 1e5 + 5 ;
const long long MOD = 1e9+7 ;
//###########################################################################
void hack(){}
//###########################################################################
long long n, m, ar[N], pref[N], suff[N], mx, ans ;
vector < long long > cur, vc ;
void rec ( int cuts, int pos ){
if ( cuts == m ){
if ( ans >= mx ){
vc = cur ;
mx = ans ;
}
return ;
}
if ( pos == n ){return;}
for ( int i = pos ; i < n ; i ++ ){
cur.push_back(i) ;
ans += (pref[i]-pref[pos-1])*suff[i+1] ;
/////////////////
rec(cuts+1,i+1) ;
/////////////////
cur.pop_back() ;
ans -= (pref[i]-pref[pos-1])*suff[i+1] ;
}
}
int main(){
cin >> n >> m ;
for ( int i = 1 ; i <= n ; i ++ ){
cin >> ar[i] ;
pref[i] = pref[i-1]+ar[i] ;
}
for ( int i = n ; i >= 1 ; i -- ){
suff[i] = suff[i+1]+ar[i] ;
}
if ( !m ){
cout << 0 << '\n' ;
return 0 ;
}
///////////////////////////////////
for ( int i = 1 ; i < n ; i ++ ){
cur.push_back(i) ;
ans += pref[i] * suff[i+1] ;
////////////////
rec(1,i+1) ;
////////////////
cur.pop_back() ;
ans -= pref[i] * suff[i+1] ;
}
cout << mx << '\n' ;
for ( int i : vc ){cout<<i<<' ';}
}
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