oj.uz

Submission #671849

# Submission time Handle Problem Language Result Execution time Memory
671849 2022-12-14T05:08:11 Z smartmonky K blocks (IZhO14_blocks) C++14
0 / 100
 19 ms 41428 KB 
#include <bits/stdc++.h>
  
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
 
using namespace std;
 
const int N = 1e5 + 50;
int dp[N][105];
main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	memset(dp, 0x3f3f, sizeof(dp));
	int n, k;
	cin >> n >> k;
	vector <int> v(n + 1);
	for(int i = 1; i <= n; i++){
		cin >> v[i];
	}
	dp[1][0] = -1e9;
	for(int i = 1; i <= n; i++)dp[1][i] = max(v[i], dp[1][i - 1]);
	for(int i = 2; i <= k; i++){
		deque <pair <int,int> > d;
		for(int j = i; j <= n; j++){
			int prev = dp[i - 1][j - 1];
			while(!d.empty() && d.front().ff < v[j]){
				prev = min(d.front().ss, prev);
				d.pop_back();
			}
			if(d.empty() || v[j] >= d.back().ff && prev + v[j] < d.back().ff + d.back().ss){
				d.push_back({v[j], prev});
			}
			dp[i][j] = d.back().ff + d.back().ss;
		}
	}
	cout << dp[k][n];
}

Compilation message

blocks.cpp:13:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   13 | main(){
      | ^~~~
blocks.cpp: In function 'int main()':
blocks.cpp:34:40: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   34 |    if(d.empty() || v[j] >= d.back().ff && prev + v[j] < d.back().ff + d.back().ss){

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 41428 KB Output is correct
2 Correct 16 ms 41428 KB Output is correct
3 Correct 15 ms 41428 KB Output is correct
4 Correct 16 ms 41384 KB Output is correct
5 Correct 16 ms 41316 KB Output is correct
6 Correct 15 ms 41380 KB Output is correct
7 Correct 16 ms 41372 KB Output is correct
8 Incorrect 18 ms 41428 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #2
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 41400 KB Output is correct
2 Correct 16 ms 41416 KB Output is correct
3 Correct 16 ms 41424 KB Output is correct
4 Correct 16 ms 41372 KB Output is correct
5 Correct 16 ms 41364 KB Output is correct
6 Correct 16 ms 41324 KB Output is correct
7 Correct 16 ms 41428 KB Output is correct
8 Incorrect 19 ms 41344 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #3
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 41428 KB Output is correct
2 Correct 16 ms 41428 KB Output is correct
3 Correct 15 ms 41428 KB Output is correct
4 Correct 16 ms 41384 KB Output is correct
5 Correct 16 ms 41316 KB Output is correct
6 Correct 15 ms 41380 KB Output is correct
7 Correct 16 ms 41372 KB Output is correct
8 Incorrect 18 ms 41428 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #4
0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 41428 KB Output is correct
2 Correct 16 ms 41428 KB Output is correct
3 Correct 15 ms 41428 KB Output is correct
4 Correct 16 ms 41384 KB Output is correct
5 Correct 16 ms 41316 KB Output is correct
6 Correct 15 ms 41380 KB Output is correct
7 Correct 16 ms 41372 KB Output is correct
8 Incorrect 18 ms 41428 KB Output isn't correct
9 Halted 0 ms 0 KB -