#include <bits/stdc++.h>
// #pragma GCC optimize ("Ofast,unroll-loops")
// #pragma GCC target ("avx2")
using namespace std;
typedef long long ll;
typedef pair<int, int> pp;
#define er(args ...) cerr << __LINE__ << ": ", err(new istringstream(string(#args)), args), cerr << endl
#define per(i,r,l) for(int i = (r); i >= (l); i--)
#define rep(i,l,r) for(int i = (l); i < (r); i++)
#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
#define pb push_back
#define ss second
#define ff first
void err(istringstream *iss){}template<typename T,typename ...Args> void err(istringstream *iss,const T &_val, const Args&...args){string _name;*iss>>_name;if(_name.back()==',')_name.pop_back();cerr<<_name<<" = "<<_val<<", ",err(iss,args...);}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const ll mod = 1e9 + 7, maxn = 1e5 + 1, maxk = 101, lg = 21, inf = ll(1e9) + 5;
ll pw(ll a,ll b,ll md=mod){if(!b)return 1;ll k=pw(a,b>>1ll);return k*k%md*(b&1ll?a:1)%md;}
int dp[maxn], nw[maxn], a[maxn][lg], lgg[maxn];
int get(int l, int r){
int g = lgg[r-l+1];
return max(a[l][g], a[r-(1<<g)+1][g]);
}
void slv(int l, int r, int lx, int rx){
int mid = (l + r)>>1;
int cr = get(min(rx,mid), mid);
pp sl = {inf, -1};
per(i,min(rx,mid),max(lx,1)) cr = max(cr, a[i][0]), sl = min(sl, {dp[i-1] + cr, i});
nw[mid] = sl.ff;
if(l < mid) slv(l, mid-1, lx, sl.ss);
if(r > mid) slv(mid+1, r, sl.ss, rx);
}
int main(){
cin.tie(0) -> sync_with_stdio(0);
rep(i,2,maxn) lgg[i] = lgg[i>>1] + 1;
int n, k; cin >> n >> k;
rep(i,0,n) cin >> a[i][0];
rep(j,1,lg) rep(i,0,n-(1<<j)+1) a[i][j] = max(a[i][j-1], a[i+(1<<(j-1))][j-1]);
rep(i,0,n) dp[i] = max(i?dp[i-1]:0, a[i][0]);
rep(i,2,k+1){
slv(i-1, n-1, i-1, n-1);
rep(j,0,i-1) dp[j] = inf;
rep(j,i-1,n) dp[j] = nw[j];
}
cout << dp[n-1] << '\n';
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
724 KB |
Output is correct |
| 2 |
Correct |
1 ms |
724 KB |
Output is correct |
| 3 |
Correct |
1 ms |
724 KB |
Output is correct |
| 4 |
Correct |
1 ms |
724 KB |
Output is correct |
| 5 |
Correct |
1 ms |
724 KB |
Output is correct |
| 6 |
Correct |
1 ms |
724 KB |
Output is correct |
| 7 |
Correct |
1 ms |
724 KB |
Output is correct |
| 8 |
Correct |
1 ms |
724 KB |
Output is correct |
| 9 |
Correct |
1 ms |
724 KB |
Output is correct |
| 10 |
Correct |
1 ms |
724 KB |
Output is correct |
| 11 |
Incorrect |
1 ms |
724 KB |
Output isn't correct |
| 12 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
724 KB |
Output is correct |
| 2 |
Correct |
1 ms |
724 KB |
Output is correct |
| 3 |
Correct |
1 ms |
724 KB |
Output is correct |
| 4 |
Correct |
1 ms |
724 KB |
Output is correct |
| 5 |
Correct |
1 ms |
724 KB |
Output is correct |
| 6 |
Correct |
1 ms |
724 KB |
Output is correct |
| 7 |
Correct |
0 ms |
724 KB |
Output is correct |
| 8 |
Correct |
0 ms |
724 KB |
Output is correct |
| 9 |
Correct |
1 ms |
724 KB |
Output is correct |
| 10 |
Correct |
1 ms |
724 KB |
Output is correct |
| 11 |
Incorrect |
0 ms |
724 KB |
Output isn't correct |
| 12 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
724 KB |
Output is correct |
| 2 |
Correct |
1 ms |
724 KB |
Output is correct |
| 3 |
Correct |
1 ms |
724 KB |
Output is correct |
| 4 |
Correct |
1 ms |
724 KB |
Output is correct |
| 5 |
Correct |
1 ms |
724 KB |
Output is correct |
| 6 |
Correct |
1 ms |
724 KB |
Output is correct |
| 7 |
Correct |
1 ms |
724 KB |
Output is correct |
| 8 |
Correct |
1 ms |
724 KB |
Output is correct |
| 9 |
Correct |
1 ms |
724 KB |
Output is correct |
| 10 |
Correct |
1 ms |
724 KB |
Output is correct |
| 11 |
Incorrect |
1 ms |
724 KB |
Output isn't correct |
| 12 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
724 KB |
Output is correct |
| 2 |
Correct |
1 ms |
724 KB |
Output is correct |
| 3 |
Correct |
1 ms |
724 KB |
Output is correct |
| 4 |
Correct |
1 ms |
724 KB |
Output is correct |
| 5 |
Correct |
1 ms |
724 KB |
Output is correct |
| 6 |
Correct |
1 ms |
724 KB |
Output is correct |
| 7 |
Correct |
1 ms |
724 KB |
Output is correct |
| 8 |
Correct |
1 ms |
724 KB |
Output is correct |
| 9 |
Correct |
1 ms |
724 KB |
Output is correct |
| 10 |
Correct |
1 ms |
724 KB |
Output is correct |
| 11 |
Incorrect |
1 ms |
724 KB |
Output isn't correct |
| 12 |
Halted |
0 ms |
0 KB |
- |
