제출 #885570

#제출 시각아이디문제언어결과실행 시간메모리
88557012345678K개의 묶음 (IZhO14_blocks)C++17
100 / 100
160 ms42848 KiB
#include <bits/stdc++.h> using namespace std; const int nx=1e5+5, kx=105; int n, k, v[nx], dp[kx][nx], x, mx; int main() { cin.tie(NULL)->sync_with_stdio(false); cin>>n>>k; v[0]=1e9; for (int i=1; i<=n; i++) cin>>v[i], mx=max(mx, v[i]), dp[1][i]=mx; for (int i=2; i<=k; i++) { stack<pair<int, int>> s; for (int j=i; j<=n; j++) { int vl=dp[i-1][j-1]; while (!s.empty()&&s.top().first<=v[j]) vl=min(vl, s.top().second), s.pop(); dp[i][j]=vl+v[j]; if (!s.empty()) dp[i][j]=min(dp[i][j], s.top().first+s.top().second); if (s.empty()) s.push({v[j], vl}); else if (s.top().first+s.top().second>v[j]+vl) s.push({v[j], vl}); //cout<<i<<' '<<j<<' '<<dp[i][j]<<'\n'; } } cout<<dp[k][n]; }
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