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Submission #535636

# Submission time Handle Problem Language Result Execution time Memory
535636 2022-03-10T18:39:36 Z leaked Feast (NOI19_feast) C++14
12 / 100
 108 ms 12636 KB 
#include <bits/stdc++.h>

#define f first
#define s second
#define m_p make_pair
#define vec vector
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define sz(x) (int)(x).size()
#define pw(x) (1LL<<(x))
#define int long long
#define fast_resp ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
typedef pair<int,int> pii;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
template<class T> bool umin(T &a,const T &b){return (a>b?a=b,1:0);}
template<class T> bool umax(T &a,const T &b){return (a<b?a=b,1:0);}
const ll inf=1e18;
signed main(){
    fast_resp;
    int n,k;
    cin>>n>>k;
    vec<int>a(n);
    for(auto &z : a) cin>>z;
    vec<ll>pref(n,0);
    for(int i=0;i<n;i++) pref[i]=(i?pref[i-1]:0)+a[i];
    auto check=[&](ll x){
        vec<pll>dp(n+1,m_p(-inf,-1));
        pll mx={0,0};
        dp[0]={0,0};
//        cout<<"CHECK "<<x<<endl;
        for(int i=0;i<n;i++){
            dp[i+1]=dp[i];
            umax(dp[i+1],m_p(dp[i].f-x,dp[i].s+1));
            umax(dp[i+1],m_p(mx.f+pref[i]-x,mx.s+1));
            umax(mx,m_p(dp[i+1].f-pref[i],dp[i+1].s));
//            cout<<"I "<<dp[i+1].f<<endl;
        }
//        cout<<"W "<<dp[n].f<<' '<<dp[n].s<<endl;
        return dp[n];
    };
    ll l=0,r=1e9;
    while(l!=r){
        ll tm=(l+r)/2;
        if(check(tm).s<k) r=tm;
        else l=tm+1;
    }
    --l;
//    cout<<k<<' '<<l<<endl;
    cout<<check(l).f+1ll*k*l;
    return 0;
}
/*

*/

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 68 ms 12368 KB Output is correct
2 Correct 74 ms 12360 KB Output is correct
3 Correct 73 ms 12556 KB Output is correct
4 Correct 69 ms 12512 KB Output is correct
5 Correct 67 ms 12436 KB Output is correct
6 Correct 83 ms 12184 KB Output is correct
7 Correct 69 ms 12172 KB Output is correct
8 Correct 65 ms 12460 KB Output is correct
9 Correct 65 ms 12264 KB Output is correct
10 Correct 72 ms 12372 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 55 ms 10596 KB Output is correct
2 Correct 57 ms 10776 KB Output is correct
3 Correct 58 ms 10588 KB Output is correct
4 Correct 60 ms 10672 KB Output is correct
5 Correct 82 ms 12372 KB Output is correct
6 Correct 56 ms 10572 KB Output is correct
7 Correct 54 ms 10836 KB Output is correct
8 Correct 78 ms 12492 KB Output is correct
9 Correct 69 ms 12192 KB Output is correct
10 Correct 62 ms 10776 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 108 ms 12636 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 328 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 328 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 328 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 68 ms 12368 KB Output is correct
2 Correct 74 ms 12360 KB Output is correct
3 Correct 73 ms 12556 KB Output is correct
4 Correct 69 ms 12512 KB Output is correct
5 Correct 67 ms 12436 KB Output is correct
6 Correct 83 ms 12184 KB Output is correct
7 Correct 69 ms 12172 KB Output is correct
8 Correct 65 ms 12460 KB Output is correct
9 Correct 65 ms 12264 KB Output is correct
10 Correct 72 ms 12372 KB Output is correct
11 Correct 55 ms 10596 KB Output is correct
12 Correct 57 ms 10776 KB Output is correct
13 Correct 58 ms 10588 KB Output is correct
14 Correct 60 ms 10672 KB Output is correct
15 Correct 82 ms 12372 KB Output is correct
16 Correct 56 ms 10572 KB Output is correct
17 Correct 54 ms 10836 KB Output is correct
18 Correct 78 ms 12492 KB Output is correct
19 Correct 69 ms 12192 KB Output is correct
20 Correct 62 ms 10776 KB Output is correct
21 Incorrect 108 ms 12636 KB Output isn't correct
22 Halted 0 ms 0 KB -