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Submission #935811

# Submission time Handle Problem Language Result Execution time Memory
935811 2024-02-29T14:41:26 Z imarn Feast (NOI19_feast) C++14
18 / 100
 80 ms 15188 KB 
#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define vi vector<int>
#define vvi vector<vi>
#define vp vector<pii>
using namespace std;
const int N=3e5+5;
ll a[N]{0};
pll dp[N];
pll mx[N];
pll solve(ll x,int n){
    dp[0]=mx[0]={0,0};
    for(int i=1;i<=n;i++){
        dp[i] = max(dp[i-1],{mx[i-1].f+a[i]-x,mx[i-1].s});
        mx[i] = max(mx[i-1],{dp[i].f-a[i],dp[i].s+1});
    }return dp[n];
}
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n,k;cin>>n>>k;
    for(int i=1;i<=n;i++)cin>>a[i],a[i]+=a[i-1];
    ll l=0,r=1e12;
    while(l<r){
        ll m=(l+r)>>1;
        if(solve(m,n).s<=k)r=m;
        else l=m+1;
    }cout<<solve(l,n).f+l*k;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 65 ms 14780 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 49 ms 13124 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 70 ms 15188 KB Output is correct
2 Correct 76 ms 14996 KB Output is correct
3 Correct 73 ms 15036 KB Output is correct
4 Correct 74 ms 14896 KB Output is correct
5 Correct 72 ms 15032 KB Output is correct
6 Correct 74 ms 14904 KB Output is correct
7 Correct 80 ms 15176 KB Output is correct
8 Correct 72 ms 15052 KB Output is correct
9 Correct 74 ms 15028 KB Output is correct
10 Correct 79 ms 15188 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Incorrect 0 ms 600 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Incorrect 0 ms 600 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Incorrect 0 ms 600 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 65 ms 14780 KB Output isn't correct
2 Halted 0 ms 0 KB -