제출 #857897

#제출 시각아이디문제언어결과실행 시간메모리
857897nammm수열 (APIO14_sequence)C++14
0 / 100
69 ms4748 KiB
#include<bits/stdc++.h> #define pb push_back #define ll long long #define f first #define s second #define pii pair<int,int> #define vi vector<int> using namespace std; const int N=1e5+5; int par[25][N]{0}; int d1[N]{0},d2[N]{0}; int a[N]{0}; int n; int cur=1; void solve(int l,int r,int opl,int opr){ int m=(l+r)>>1; pii t = {0,0}; for(int i=opl;i<=min(opr,m-1);i++){ t=max(t,{d1[i]+(a[m]-a[i])*(a[n]-a[m]),i}); } par[cur][m]=t.s; d2[m]=t.f; if(l>=r)return; solve(l,m-1,opl,t.s); solve(m+1,r,t.s,opr); } int main(){ ios_base::sync_with_stdio(false);cin.tie(NULL); int k;cin>>n>>k; for(int i=1;i<=n;i++)cin>>a[i],a[i]+=a[i-1]; for(int i=1;i<=k;i++){ solve(1,n,0,n); for(int i=1;i<=n;i++)d1[i]=d2[i]; cur++; }int ans=0; int mem; for(int i=1;i<=n;i++){ if(ans<d2[i])ans=d2[i],mem=i; } cout<<ans<<"\n"; }

컴파일 시 표준 에러 (stderr) 메시지

sequence.cpp: In function 'int main()':
sequence.cpp:37:9: warning: variable 'mem' set but not used [-Wunused-but-set-variable]
   37 |     int mem;
      |         ^~~
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