oj.uz

Submission #1101502

# Submission time Handle Problem Language Result Execution time Memory
1101502 2024-10-16T09:14:39 Z MThanCCVA K blocks (IZhO14_blocks) C++14
0 / 100
 2 ms 4492 KB 
#include <bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
using namespace std;
const int MAXN = 1e4 + 5;
int n, k;
int dp[MAXN][105], a[MAXN];
 
int main() { 
   freopen("blocks.inp", "r", stdin);
   freopen("blocks.out", "w", stdout);
	cin >> n >> k;
	memset(dp, 0x3f, sizeof(dp));
	int mx = 0;
	for (int i = 1; i <= n; i++) {
	  cin >> a[i];
	  mx = max(mx, a[i]);
	  dp[i][1] = mx;
	}
	for (int j = 2; j <= k; j++) {
		stack<pii> s;
	 	for (int i = 1; i <= n; i++) {
	 		int tmp = dp[i - 1][j - 1];
	 		while (!s.empty() && s.top().first < a[i]) {
	 			tmp = min(tmp, s.top().second);
	 			s.pop();
	 		}
	 		if (s.empty() || a[i] + tmp < s.top().first + s.top().second) 
	 			s.push({a[i], tmp});
 
	 		if (i >= j) dp[i][j] = s.top().first + s.top().second;
	 	}
	}
	cout << dp[n][k];
  return 0;
}

Compilation message

blocks.cpp: In function 'int main()':
blocks.cpp:10:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |    freopen("blocks.inp", "r", stdin);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:11:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |    freopen("blocks.out", "w", stdout);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4432 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4492 KB Output isn't correct
2 Halted 0 ms 0 KB -