oj.uz

Submission #981171

# Submission time Handle Problem Language Result Execution time Memory
981171 2024-05-13T01:10:59 Z beaboss Feast (NOI19_feast) C++14
0 / 100
 10 ms 2652 KB 
// Source: https://oj.uz/problem/view/NOI19_feast
// 

#include "bits/stdc++.h"

using namespace std;
#define FOR(i, a, b) for (int i = a; i < b; i++)
typedef pair<int, int> pii;
#define s second
#define f first

const int N = 1e5 + 10;
int a[N];
pii dp[N][2];
int n, k;

pii solve(int l) {
	dp[0][0] = {0, 0};
	dp[0][1] = {a[0] - l, 1};

	FOR(i, 1, n) {
		dp[i][0] = max(dp[i-1][0], dp[i-1][1]);
		dp[i][1] = max(make_pair(dp[i-1][0].f + a[i] - l, dp[i-1][0].s + 1), make_pair(dp[i-1][1].f + a[i], dp[i-1][1].s));
	}
	return max(dp[n-1][1], dp[n-1][0]);

}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);

	cin >> n >> k;

	FOR(i, 0 ,n) cin >> a[i];

	int lo = 0;
	int hi = 1e9;

	while (lo < hi) {
		int m = (lo + hi + 1)/2;
		pii res = solve(m);
		// cout << res.s << k << endl;
		if (res.s >= k) lo = m;
		else hi = m -1;
	}
	// cout << lo << solve(lo).f << endl;
	cout << solve(lo).f + k * lo << endl;

}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Runtime error 9 ms 2396 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Runtime error 6 ms 1884 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Runtime error 10 ms 2652 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 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 344 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 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Runtime error 9 ms 2396 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -