oj.uz

Submission #604265

# Submission time Handle Problem Language Result Execution time Memory
604265 2022-07-25T02:23:38 Z super_j6 Feast (NOI19_feast) C++14
0 / 100
 94 ms 8476 KB 
#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;
#define endl '\n'
#define ll long long
#define pi pair<ll, ll>
#define f first
#define s second
 
const int mxn = 300001;
int n, k;
ll a[mxn];
pi dp[mxn];
 
pi sol(ll x){
	pi p = dp[0];
	for(int i = 1; i <= n; i++){
		dp[i] = dp[i - 1];
		if(p.f + a[i] - x > dp[i].f) dp[i] = {p.f + a[i] - x, p.s + 1};
		if(dp[i].f - a[i] > p.f) p = {dp[i].f - a[i], dp[i].s};
	}
	return dp[n];
}
 
int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n >> k;
	
	for(int i = 1; i <= n; i++) cin >> a[i], a[i] += a[i - 1];
	
	ll l = -1, r = 0x3f3f3f3f;
	while(r - l > 1){
		ll mid = (l + r) / 2;
		if(sol(mid).s >= k) l = mid; 
		else r = mid;
	}
	
	pi p = sol(l);
	
	cout << (p.f + k * l) << endl;
 
	return 0;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 57 ms 7136 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 7188 KB Output is correct
2 Correct 43 ms 8476 KB Output is correct
3 Correct 48 ms 8284 KB Output is correct
4 Incorrect 42 ms 8260 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 94 ms 7268 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 57 ms 7136 KB Output isn't correct
2 Halted 0 ms 0 KB -