제출 #92432

#제출 시각아이디문제언어결과실행 시간메모리
92432Vardanyan수열 (APIO14_sequence)C++14
100 / 100
1281 ms81456 KiB
//#pragma GCC optimize "-O3" #include<bits/stdc++.h> using namespace std; const int N = 1000*100+5; const long long INF = 1000000000000000000; int a[N]; long long pref[N]; long long dp[2][N]; int par[202][N]; void get(int kk,int l,int r,int s,int e){ if(l>r) return; int i = (l+r)/2; int pos = -1; long long mx = -1; for(int j = s;j<=e;j++){ if(dp[0][j]+(pref[i]-pref[j])*pref[j]>mx){ pos = j; mx = dp[0][j]+(pref[i]-pref[j])*pref[j]; dp[1][i] = dp[0][pos]+(pref[i]-pref[pos])*pref[pos]; par[kk][i] = pos; } } // pos = max(1,pos); get(kk,l,i-1,s,pos); get(kk,i+1,r,pos,e); } int main() { int n,k; scanf("%d%d",&n,&k); for(int i = 1;i<=n;i++) scanf("%d",&a[i]); for(int i = 1;i<=n;i++) pref[i] = pref[i-1]+a[i]; for(int kk = 1;kk<=k;kk++){ get(kk,kk,n,kk,n); for(int i = 0;i<=n;i++) dp[0][i] = dp[1][i]; for(int i = 0;i<=n;i++) dp[1][i] = 0; } printf("%lld\n",dp[0][n]); int kk = k; int nn = n; while(kk>0){ printf("%d\n",par[kk][nn]); nn = par[kk][nn]; kk--; } printf("\n"); return 0; }

컴파일 시 표준 에러 (stderr) 메시지

sequence.cpp: In function 'int main()':
sequence.cpp:32:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&k);
     ~~~~~^~~~~~~~~~~~~~
sequence.cpp:33:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i = 1;i<=n;i++) scanf("%d",&a[i]);
                             ~~~~~^~~~~~~~~~~~
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