oj.uz

Submission #884262

# Submission time Handle Problem Language Result Execution time Memory
884262 2023-12-07T04:10:18 Z pan Feast (NOI19_feast) C++17
12 / 100
 137 ms 12892 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;
typedef long long ll;
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)
		{
			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;
		}
		else if (y.next==food2.size())
		{
			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;
		}
		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));
		//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:50:16: 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]
   50 |  for (ll i=0; i<food.size();i++)
      |               ~^~~~~~~~~~~~
feast.cpp:72:10: 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]
   72 |    if (nn<food2.size()) food2[nn].prev=ind;
      |        ~~^~~~~~~~~~~~~
feast.cpp:78:18: 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]
   78 |   else if (y.next==food2.size())
      |            ~~~~~~^~~~~~~~~~~~~~
feast.cpp:94:10: 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]
   94 |    if (nn<food2.size()) food2[nn].prev=ind;
      |        ~~^~~~~~~~~~~~~
feast.cpp:109:16: 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]
  109 |  for (ll i=0; i<food2.size(); ++i)
      |               ~^~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 404 KB Output is correct
2 Correct 80 ms 404 KB Output is correct
3 Correct 81 ms 412 KB Output is correct
4 Correct 80 ms 356 KB Output is correct
5 Correct 88 ms 404 KB Output is correct
6 Correct 76 ms 348 KB Output is correct
7 Correct 78 ms 404 KB Output is correct
8 Correct 81 ms 348 KB Output is correct
9 Correct 79 ms 404 KB Output is correct
10 Correct 83 ms 348 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 44 ms 436 KB Output is correct
2 Correct 43 ms 408 KB Output is correct
3 Correct 43 ms 348 KB Output is correct
4 Correct 46 ms 348 KB Output is correct
5 Correct 82 ms 412 KB Output is correct
6 Correct 43 ms 348 KB Output is correct
7 Correct 42 ms 348 KB Output is correct
8 Correct 84 ms 412 KB Output is correct
9 Correct 78 ms 408 KB Output is correct
10 Correct 45 ms 344 KB Output is correct

Subtask #3
0 / 18.0

# Verdict Execution time Memory Grader output
1 Incorrect 137 ms 12892 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 360 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 356 KB Output is correct
4 Incorrect 0 ms 360 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 360 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 356 KB Output is correct
4 Incorrect 0 ms 360 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 360 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 356 KB Output is correct
4 Incorrect 0 ms 360 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 81 ms 404 KB Output is correct
2 Correct 80 ms 404 KB Output is correct
3 Correct 81 ms 412 KB Output is correct
4 Correct 80 ms 356 KB Output is correct
5 Correct 88 ms 404 KB Output is correct
6 Correct 76 ms 348 KB Output is correct
7 Correct 78 ms 404 KB Output is correct
8 Correct 81 ms 348 KB Output is correct
9 Correct 79 ms 404 KB Output is correct
10 Correct 83 ms 348 KB Output is correct
11 Correct 44 ms 436 KB Output is correct
12 Correct 43 ms 408 KB Output is correct
13 Correct 43 ms 348 KB Output is correct
14 Correct 46 ms 348 KB Output is correct
15 Correct 82 ms 412 KB Output is correct
16 Correct 43 ms 348 KB Output is correct
17 Correct 42 ms 348 KB Output is correct
18 Correct 84 ms 412 KB Output is correct
19 Correct 78 ms 408 KB Output is correct
20 Correct 45 ms 344 KB Output is correct
21 Incorrect 137 ms 12892 KB Output isn't correct
22 Halted 0 ms 0 KB -