oj.uz

답안 #443069

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
443069 2021-07-09T15:20:09 Z leaked K개의 묶음 (IZhO14_blocks) C++14
0 / 100
 1 ms 716 KB 
#include <bits/stdc++.h>
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("Ofast")
//#pragma GCC optimize("-O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define vec vector
#define sz(x) ( int)x.size()
#define m_p make_pair
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
using namespace std;
typedef long long ll;
typedef pair<ll, int> pli;
typedef pair<int,ll> pil;
typedef pair<int,int> pii;
typedef unsigned long long ull;
auto rng=bind(uniform_int_distribution<int>(1,1000),mt19937(time(0)));
template<class T> bool umax(T &a,const T &b){return (a<b?a=b,1:0);}
template<class T> bool umin(T &a,const T &b){return (a>b?a=b,1:0);}
const int N=1e5+1;
const int lg=(int)log2(N)+1;
int mx[N][lg],lvl[N];
int dp[N][2];
int get(int l,int r){
    if(l>r) return 1e9;
    int x=lvl[r-l+1];
    return max(mx[l][x],mx[r-(1<<x)+1][x]);
}
void rec(int l,int r,int x,int y){
    if(l>r) return;
    if(x>r) return;
    int mid=(l+r)>>1;
    int js=x;
    dp[mid][1]=min((int)1e9,dp[x][0]+get(x+1,mid));
    for(int i=x;i<=min(mid-1,y);i++){
        if(umin(dp[mid][1],dp[i][0]+get(i+1,mid))) js=i;
    }
    if(l==r) return;
    rec(l,mid,x,js);rec(mid+1,r,js,y);
}
signed main(){
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int n,k;
    cin>>n>>k;
    for(int i=0;i<n;i++) cin>>mx[i][0];
    for(int j=1;j<lg;j++){
        for(int i=0;i+(1<<(j-1))<n;i++){
            mx[i][j]=max(mx[i][j-1],mx[i+(1<<(j-1))][j-1]);
        }
    }
    for(int i=2;i<N;i++) lvl[i]=lvl[i/2]+1;
    for(int i=0;i<n;i++){
        dp[i][1]=get(0,i);
//        cout<<dp[i][1]<<' ';
    }
    for(int i=1;i<k;i++){
        for(int j=0;j<n;j++) swap(dp[j][0],dp[j][1]);
//        cerr<<endl;
        for(int j=0;j<i-1;j++){
            dp[j][0]=1e9;
        }
        rec(0,n-1,0,n-1);
    }
//    for(int i=0;i<n;i++) cerr<<dp[i][1]<<' ';
    cout<<dp[n-1][1];
    return 0;
}

/*
5
1 2
2 3
3 4
4 5
5 1
*/

Subtask #1
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 716 KB Output is correct
2 Correct 1 ms 716 KB Output is correct
3 Correct 1 ms 716 KB Output is correct
4 Correct 1 ms 716 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 1 ms 716 KB Output is correct
8 Correct 1 ms 716 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 1 ms 716 KB Output is correct
11 Incorrect 1 ms 716 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 716 KB Output is correct
2 Correct 1 ms 716 KB Output is correct
3 Correct 1 ms 716 KB Output is correct
4 Correct 1 ms 716 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 1 ms 716 KB Output is correct
8 Correct 1 ms 716 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 1 ms 716 KB Output is correct
11 Incorrect 1 ms 716 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 716 KB Output is correct
2 Correct 1 ms 716 KB Output is correct
3 Correct 1 ms 716 KB Output is correct
4 Correct 1 ms 716 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 1 ms 716 KB Output is correct
8 Correct 1 ms 716 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 1 ms 716 KB Output is correct
11 Incorrect 1 ms 716 KB Output isn't correct
12 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 716 KB Output is correct
2 Correct 1 ms 716 KB Output is correct
3 Correct 1 ms 716 KB Output is correct
4 Correct 1 ms 716 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 1 ms 716 KB Output is correct
7 Correct 1 ms 716 KB Output is correct
8 Correct 1 ms 716 KB Output is correct
9 Correct 1 ms 716 KB Output is correct
10 Correct 1 ms 716 KB Output is correct
11 Incorrect 1 ms 716 KB Output isn't correct
12 Halted 0 ms 0 KB -