oj.uz

Submission #1083686

# Submission time Handle Problem Language Result Execution time Memory
1083686 2024-09-03T20:22:57 Z xnqs K blocks (IZhO14_blocks) C++17
0 / 100
 1 ms 1372 KB 
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <utility>
#include <algorithm>
#include <cstring>
 
int x, k;
int arr[100005];
int dp[2][100005];
 
void divide(int l, int r, int optl, int optr, int idx) {
	//std::cerr << " " << l << " " << r << " " << optl << " " << optr << " " << idx << "\n";
	if (l>r) {
		return;
	}
 
	int m = (l+r)>>1;
	int max = 0;
	int opt = -1;
	for (int i = std::min(m, optr+100); i >= std::max(1, optl-60); i--) {
		max = std::max(max, arr[i]);
		if (dp[idx][m] > dp[idx^1][i-1]+max) {
			dp[idx][m] = dp[idx^1][i-1]+max;
			opt = i;
		}
	}
 
	divide(l,m-1,optl,opt,idx);
	divide(m+1,r,opt,optr,idx);
}
 
int main() {
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(NULL);
	std::cout.tie(NULL);
 
	std::cin >> x >> k;
	for (int i = 1; i <= x; i++) {
		std::cin >> arr[i];
	}
 
	dp[1][0] = 0;
	for (int i = 1; i <= x; i++) {
		dp[1][i] = std::max(dp[1][i-1], arr[i]);
	}
	for (int i = 2; i <= k; i++) {
		memset(dp[i],0x3f,sizeof(dp));
		divide(1,x,1,x,i&1);
	}
 
	std::cout << dp[k&1][x] << "\n";
}

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Runtime error 1 ms 1372 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Runtime error 1 ms 1372 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Runtime error 1 ms 1372 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Runtime error 1 ms 1372 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -