oj.uz

Submission #485986

# Submission time Handle Problem Language Result Execution time Memory
485986 2021-11-10T03:45:45 Z Killer2501 Feast (NOI19_feast) C++14
100 / 100
 196 ms 165236 KB 
#include<bits/stdc++.h>
#define pll pair<ll, ll>
#define fi first
#define se second
#define pb push_back
#define task "hopscotch"
#define pii pair<ll, pll>
using namespace std;
using ll = long long;
const int  N = 3e5+5;
const ll mod = 1e9+7;
const ll base = 350;
const ll inf = 1e15;
ll m, n, t, k, a[N], ans, tong, b[N], d[N], h[N];
vector<pii> kq;
bool ok[N];
string s;
ll pw(ll k, ll n)
{
	ll total = 1;
	for(; n; n >>= 1)
	{
		if(n&1)total = total * k % mod;
		k = k * k % mod;
	}
	return total;
}
struct node
{
	ll mx, sum, l, r, pre, suf, nl, nr;
	node(ll _mx = -inf, ll _sum = -inf, ll _l = 0, ll _r = 0, ll _pre = -inf, ll _suf = -inf, ll _nl = 0, ll _nr = 0)
	{
		mx = _mx;
		sum = _sum;
		l = _l;
		r = _r;
		pre = _pre;
		suf = _suf;
		nl = _nl;
		nr = _nr;
	}

};
node merga(node x, node y)
{
	node res;
	res.sum = x.sum + y.sum;
	if(x.mx > y.mx)
	{
		res.mx = x.mx;
		res.l = x.l;
		res.r = x.r;
	}
	else
	{
		res.mx = y.mx;
		res.l = y.l;
		res.r = y.r;
	}
	if(res.mx < x.suf+y.pre)
	{
		res.mx = x.suf+y.pre;
		res.l = x.nr;
		res.r = y.nl;
	}
	res.pre = x.pre;
	res.nl = x.nl;
	if(res.pre < x.sum + y.pre)
	{
		res.pre = x.sum + y.pre;
		res.nl = y.nl;
	}
	res.suf = y.suf;
	res.nr = y.nr;
	if(res.suf < x.suf + y.sum)
	{
		res.suf = x.suf + y.sum;
		res.nr = x.nr;
	}
	return res;
}
struct IT
{
	ll n;
	vector<node> st, rv;
	vector<ll> lazy;
	IT(ll _n)
	{
		n = _n;
		st.resize(n*4+4);
		rv.resize(n*4+4);
		lazy.resize(n*4+4, 0);
	}
	void build(ll id, ll l, ll r)
	{
		if(l == r)
		{
			st[id] = node(a[l], a[l], l, l, a[l], a[l], l, l);
			rv[id] = node(-a[l], -a[l], l, l, -a[l], -a[l], l, l);
			return;
		}
		ll mid = (l+r)/2;
		build(id*2, l, mid);
		build(id*2+1, mid+1, r);
		st[id] = merga(st[id*2], st[id*2+1]);
		rv[id] = merga(rv[id*2], rv[id*2+1]);
	}
	void build()
	{
		build(1, 1, n);
	}
	void down(ll id)
	{
		if(!lazy[id])return;
		swap(st[id*2], rv[id*2]);
		swap(st[id*2+1], rv[id*2+1]);
		lazy[id*2] ^= 1;
		lazy[id*2+1] ^= 1;
		lazy[id] = 0;
	}
	void update(ll id, ll l, ll r, ll u, ll v)
	{
		if(u <= l && r <= v)
		{
			swap(st[id], rv[id]);
			lazy[id] ^= 1;
			return;
		}
		if(u > r || l > v)return;
		ll mid = (l+r)/2;
		down(id);
		update(id*2, l, mid, u, v);
		update(id*2+1, mid+1, r, u, v);
		st[id] = merga(st[id*2], st[id*2+1]);
		rv[id] = merga(rv[id*2], rv[id*2+1]);
	}
	void update(ll l, ll r)
	{
		update(1, 1, n, l, r);
	}
};
void sol()
{
    cin >> n >> k;
    for(int i = 1; i <= n; i ++)cin >> a[i];
    IT it(n);
    it.build();

    while(k -- > 0)
	{
		if(it.st[1].mx <= 0)break;
		ans += it.st[1].mx;
		it.update(it.st[1].l, it.st[1].r);
	}
	cout << ans;
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    if(fopen(task".in", "r"))
    {
        freopen(task".in", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    int ntest = 1;
    //cin >> ntest;
    while(ntest -- > 0)
    sol();
}
/*
5 4
1 2 1
2 3 4
1 4 3
4 3 2
3
1 3 1
1 3 2
1 3 3
*/

Compilation message

feast.cpp: In function 'int main()':
feast.cpp:164:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  164 |         freopen(task".in", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
feast.cpp:165:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  165 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 157892 KB Output is correct
2 Correct 102 ms 163112 KB Output is correct
3 Correct 115 ms 164992 KB Output is correct
4 Correct 115 ms 163852 KB Output is correct
5 Correct 99 ms 163000 KB Output is correct
6 Correct 111 ms 160236 KB Output is correct
7 Correct 103 ms 160064 KB Output is correct
8 Correct 101 ms 163372 KB Output is correct
9 Correct 108 ms 160688 KB Output is correct
10 Correct 119 ms 162256 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 89 ms 158540 KB Output is correct
2 Correct 92 ms 163116 KB Output is correct
3 Correct 89 ms 159172 KB Output is correct
4 Correct 94 ms 160636 KB Output is correct
5 Correct 100 ms 160280 KB Output is correct
6 Correct 93 ms 159044 KB Output is correct
7 Correct 93 ms 163424 KB Output is correct
8 Correct 109 ms 164064 KB Output is correct
9 Correct 96 ms 159812 KB Output is correct
10 Correct 91 ms 162308 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 100 ms 161244 KB Output is correct
2 Correct 110 ms 161348 KB Output is correct
3 Correct 134 ms 162960 KB Output is correct
4 Correct 103 ms 161380 KB Output is correct
5 Correct 101 ms 162912 KB Output is correct
6 Correct 103 ms 163908 KB Output is correct
7 Correct 107 ms 164620 KB Output is correct
8 Correct 115 ms 163012 KB Output is correct
9 Correct 120 ms 165060 KB Output is correct
10 Correct 103 ms 164548 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 1 ms 460 KB Output is correct
16 Correct 1 ms 460 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 460 KB Output is correct
19 Correct 0 ms 460 KB Output is correct
20 Correct 1 ms 460 KB Output is correct

Subtask #6
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 0 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 1 ms 460 KB Output is correct
12 Correct 1 ms 460 KB Output is correct
13 Correct 1 ms 460 KB Output is correct
14 Correct 1 ms 460 KB Output is correct
15 Correct 1 ms 460 KB Output is correct
16 Correct 1 ms 460 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 460 KB Output is correct
19 Correct 0 ms 460 KB Output is correct
20 Correct 1 ms 460 KB Output is correct
21 Correct 1 ms 1356 KB Output is correct
22 Correct 2 ms 1304 KB Output is correct
23 Correct 1 ms 1356 KB Output is correct
24 Correct 1 ms 1356 KB Output is correct
25 Correct 1 ms 1356 KB Output is correct
26 Correct 1 ms 1356 KB Output is correct
27 Correct 1 ms 1372 KB Output is correct
28 Correct 1 ms 1356 KB Output is correct
29 Correct 1 ms 1356 KB Output is correct
30 Correct 1 ms 1356 KB Output is correct

Subtask #7
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 103 ms 157892 KB Output is correct
2 Correct 102 ms 163112 KB Output is correct
3 Correct 115 ms 164992 KB Output is correct
4 Correct 115 ms 163852 KB Output is correct
5 Correct 99 ms 163000 KB Output is correct
6 Correct 111 ms 160236 KB Output is correct
7 Correct 103 ms 160064 KB Output is correct
8 Correct 101 ms 163372 KB Output is correct
9 Correct 108 ms 160688 KB Output is correct
10 Correct 119 ms 162256 KB Output is correct
11 Correct 89 ms 158540 KB Output is correct
12 Correct 92 ms 163116 KB Output is correct
13 Correct 89 ms 159172 KB Output is correct
14 Correct 94 ms 160636 KB Output is correct
15 Correct 100 ms 160280 KB Output is correct
16 Correct 93 ms 159044 KB Output is correct
17 Correct 93 ms 163424 KB Output is correct
18 Correct 109 ms 164064 KB Output is correct
19 Correct 96 ms 159812 KB Output is correct
20 Correct 91 ms 162308 KB Output is correct
21 Correct 100 ms 161244 KB Output is correct
22 Correct 110 ms 161348 KB Output is correct
23 Correct 134 ms 162960 KB Output is correct
24 Correct 103 ms 161380 KB Output is correct
25 Correct 101 ms 162912 KB Output is correct
26 Correct 103 ms 163908 KB Output is correct
27 Correct 107 ms 164620 KB Output is correct
28 Correct 115 ms 163012 KB Output is correct
29 Correct 120 ms 165060 KB Output is correct
30 Correct 103 ms 164548 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 1 ms 332 KB Output is correct
33 Correct 0 ms 332 KB Output is correct
34 Correct 1 ms 332 KB Output is correct
35 Correct 0 ms 332 KB Output is correct
36 Correct 0 ms 332 KB Output is correct
37 Correct 1 ms 332 KB Output is correct
38 Correct 0 ms 332 KB Output is correct
39 Correct 0 ms 332 KB Output is correct
40 Correct 0 ms 332 KB Output is correct
41 Correct 1 ms 460 KB Output is correct
42 Correct 1 ms 460 KB Output is correct
43 Correct 1 ms 460 KB Output is correct
44 Correct 1 ms 460 KB Output is correct
45 Correct 1 ms 460 KB Output is correct
46 Correct 1 ms 460 KB Output is correct
47 Correct 1 ms 460 KB Output is correct
48 Correct 1 ms 460 KB Output is correct
49 Correct 0 ms 460 KB Output is correct
50 Correct 1 ms 460 KB Output is correct
51 Correct 1 ms 1356 KB Output is correct
52 Correct 2 ms 1304 KB Output is correct
53 Correct 1 ms 1356 KB Output is correct
54 Correct 1 ms 1356 KB Output is correct
55 Correct 1 ms 1356 KB Output is correct
56 Correct 1 ms 1356 KB Output is correct
57 Correct 1 ms 1372 KB Output is correct
58 Correct 1 ms 1356 KB Output is correct
59 Correct 1 ms 1356 KB Output is correct
60 Correct 1 ms 1356 KB Output is correct
61 Correct 172 ms 161188 KB Output is correct
62 Correct 196 ms 165236 KB Output is correct
63 Correct 112 ms 160836 KB Output is correct
64 Correct 190 ms 164060 KB Output is correct
65 Correct 145 ms 163976 KB Output is correct
66 Correct 156 ms 163396 KB Output is correct
67 Correct 142 ms 161084 KB Output is correct
68 Correct 110 ms 164092 KB Output is correct
69 Correct 112 ms 160796 KB Output is correct
70 Correct 101 ms 160104 KB Output is correct