oj.uz

Submission #884324

# Submission time Handle Problem Language Result Execution time Memory
884324 2023-12-07T06:56:28 Z pan Feast (NOI19_feast) C++17
53 / 100
 135 ms 13244 KB 
#include <iostream>
#include <queue>
#include <vector>
#include <climits>
#define mp make_pair
#define pb push_back
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pi;
struct node 
{
	ll prev, next, val;
};

struct compare
{
	bool operator() (pi const& a, pi const& b)
	{
		return a.first>b.first;
	}
};

int main()
{
	ll n,k,x;
	cin >> n >> k;
	vector<ll> food;
	for (ll i=0; i<n; ++i)
	{
		cin >> x;
		if (x==0) continue;
		if (!food.empty() && ((x<0 && food.back()<0 ) || (x>0 && food.back()>0)))
		{
			food[food.size()-1]+=x;
		}
		else
		{
			food.push_back(x);
		}
	}
	if (food[0]<0) food.erase(food.begin());
	if (food.back()<0) food.pop_back();
	//for (ll i=0; i<food.size(); ++i) cout << food[i] << endl;
	ll nowk = (food.size()+1)/2;
	priority_queue<pi, vector<pi>, compare> pq;
	vector<node> food2;
	for (ll i=0; i<food.size();i++)
	{
		node y;
		y.prev=i-1, y.next = i+1, y.val = food[i];
		food2.pb(y);
		pq.push(mp(abs(food[i]),i));
	}
	for (ll i=0; i<nowk-k; ++i)
	{
		//cout << "running " << i << endl;
		while (abs(food2[pq.top().second].val)!=abs(pq.top().first))
		{
			pq.pop();
		}
		ll ind=pq.top().second;
		pq.pop();
		node y= food2[ind];
		//cout << "prev is " << y.prev << "next is " << y.next << endl;
		if (y.prev==-1)
		{
			if (y.val>0)
			{
				ll n = y.next;
				ll nn = food2[n].next;
				if (nn<food2.size()) food2[nn].prev=-1;
				food2[ind].val = -1e10;
				food2[n].val=-1e10;
				
				
			}
			else
			{
				ll n = y.next;
				ll nn = food2[n].next;
				if (nn<food2.size()) food2[nn].prev=ind;
				food2[ind].val+=food2[n].val;
				food2[ind].prev = -1;
				food2[ind].next = nn;
				food2[n].val = -1e10;
				pq.push(mp(abs(food2[ind].val), ind));
			}
		}
		else if (y.next==food2.size())
		{
			if (y.val>0)
			{
				ll p = y.prev;
				ll pp = food2[p].prev;
				if (pp>=0) food2[pp].next=food2.size();
				food2[ind].val = -1e10;
				food2[p].val=-1e10;
			}
			else
			{
				ll p = y.prev;
				ll pp = food2[p].prev;
				if (pp>=0) food2[pp].next=ind;
				food2[ind].val+=food2[p].val;
				food2[ind].next = food2.size();
				food2[ind].prev = pp;
				food2[p].val = -1e10;
				pq.push(mp(abs(food2[ind].val), ind));
			}
		}
		else
		{
			ll p = y.prev, n = y.next;
			ll nn = food2[n].next;
			ll pp = food2[p].prev;
			if (pp>=0) food2[pp].next=ind;
			if (nn<food2.size()) food2[nn].prev=ind;
			food2[ind].val+=food2[p].val+food2[n].val;
			food2[ind].prev = pp;
			food2[ind].next = nn;
			food2[p].val = -1e10;
			food2[n].val = -1e10;
			pq.push(mp(abs(food2[ind].val), ind));

		}
		pq.push(mp(abs(food2[ind].val), ind));
		//for (ll i=0; i<food2.size(); ++i) cout << food2[i].val  << endl;
		//cout << "Now pointing to " << food2[ind].prev  << " and " <<food2[ind].next << endl;
		
	}
	
	ll ans=0;
	
	for (ll i=0; i<food2.size(); ++i) 
	{
		if (food2[i].val>0) {ans+=food2[i].val;}
	}
	cout << ans;

	return 0;
}

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:48:16: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |  for (ll i=0; i<food.size();i++)
      |               ~^~~~~~~~~~~~
feast.cpp:72:11: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |     if (nn<food2.size()) food2[nn].prev=-1;
      |         ~~^~~~~~~~~~~~~
feast.cpp:82:11: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   82 |     if (nn<food2.size()) food2[nn].prev=ind;
      |         ~~^~~~~~~~~~~~~
feast.cpp:90:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   90 |   else if (y.next==food2.size())
      |            ~~~~~~^~~~~~~~~~~~~~
feast.cpp:118:10: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |    if (nn<food2.size()) food2[nn].prev=ind;
      |        ~~^~~~~~~~~~~~~
feast.cpp:135:16: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<node>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  135 |  for (ll i=0; i<food2.size(); ++i)
      |               ~^~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 408 KB Output is correct
2 Correct 77 ms 408 KB Output is correct
3 Correct 78 ms 404 KB Output is correct
4 Correct 98 ms 348 KB Output is correct
5 Correct 77 ms 344 KB Output is correct
6 Correct 82 ms 404 KB Output is correct
7 Correct 76 ms 344 KB Output is correct
8 Correct 77 ms 344 KB Output is correct
9 Correct 76 ms 344 KB Output is correct
10 Correct 77 ms 348 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 45 ms 596 KB Output is correct
2 Correct 41 ms 344 KB Output is correct
3 Correct 40 ms 348 KB Output is correct
4 Correct 41 ms 348 KB Output is correct
5 Correct 76 ms 348 KB Output is correct
6 Correct 41 ms 344 KB Output is correct
7 Correct 50 ms 408 KB Output is correct
8 Correct 100 ms 408 KB Output is correct
9 Correct 76 ms 600 KB Output is correct
10 Correct 41 ms 348 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 135 ms 13244 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 688 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 688 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 0 ms 344 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 1 ms 468 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 344 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 85 ms 408 KB Output is correct
2 Correct 77 ms 408 KB Output is correct
3 Correct 78 ms 404 KB Output is correct
4 Correct 98 ms 348 KB Output is correct
5 Correct 77 ms 344 KB Output is correct
6 Correct 82 ms 404 KB Output is correct
7 Correct 76 ms 344 KB Output is correct
8 Correct 77 ms 344 KB Output is correct
9 Correct 76 ms 344 KB Output is correct
10 Correct 77 ms 348 KB Output is correct
11 Correct 45 ms 596 KB Output is correct
12 Correct 41 ms 344 KB Output is correct
13 Correct 40 ms 348 KB Output is correct
14 Correct 41 ms 348 KB Output is correct
15 Correct 76 ms 348 KB Output is correct
16 Correct 41 ms 344 KB Output is correct
17 Correct 50 ms 408 KB Output is correct
18 Correct 100 ms 408 KB Output is correct
19 Correct 76 ms 600 KB Output is correct
20 Correct 41 ms 348 KB Output is correct
21 Incorrect 135 ms 13244 KB Output isn't correct
22 Halted 0 ms 0 KB -