oj.uz

Submission #1000771

# Submission time Handle Problem Language Result Execution time Memory
1000771 2024-06-18T08:34:03 Z Tob Cultivation (JOI17_cultivation) C++14
30 / 100
 22 ms 2384 KB 
#include <bits/stdc++.h>
 
#pragma optimize("O3, unroll-loops")
 
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define pb push_back
#define FIO ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
 
using namespace std;
 
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
 
const int N = 307, inf = 2e9;
 
int n, m, k;
int a[N], b[N];
int mem[2*N][N];
pii gr[2*N][N];
vector <int> add[2*N], rem[2*N];
 
struct MQ {
	queue <ll> q; deque <ll> dq;
	inline void push(ll x) {q.push(x); while (!dq.empty() && dq.back() < x) dq.pop_back(); dq.pb(x);}
	inline void pop() {ll x = q.front(); q.pop(); if (dq[0] == x) dq.pop_front();}
	inline ll get() {return dq[0];}
};
 
int main () {
	FIO;
	cin >> n >> m >> k;
	
	vector <pii> so;
	for (int i = 0; i < k; i++) {
		cin >> a[i] >> b[i];
		a[i]--; b[i]--;
		so.pb({a[i], b[i]});
	}
	sort(all(so));
	for (int i = 0; i < k; i++) a[i] = so[i].F, b[i] = so[i].S;
	
	int d = a[0]; for (int i = 0; i < k; i++) a[i] -= d;
	d = n-a[k-1]-1; for (int i = 1; i < k; i++) d = max(d, a[i]-a[i-1]-1);
	a[k] = n-1;
	vector <ll> v; v.pb(d);
	for (int i = 0; i <= k; i++) {
		for (int j = i; j <= k; j++) {
			if (a[j]-a[i]-1 >= d) v.pb(a[j]-a[i]-1);
			if (a[j]+n-a[i]-1 >= d) v.pb(a[j]+n-a[i]-1);
		}
		if (n-a[i]-1 >= d) v.pb(n-a[i]-1);
	}
	sort(all(v)); v.erase(unique(all(v)), v.end());
	
	//PRECOMPUTE -> O(N^2 log N)
	for (int i = 0; i < k; i++) {
		set <int> s;
		multiset <int> rj;
		rj.insert(0);
		for (int j = i; j >= 0; j--) {
			mem[i][j] = mem[i][j+1];
			gr[i][j].F = gr[i][j+1].F;
			gr[i][j].S = gr[i][j+1].S;
			if (s.find(b[j]) != s.end()) continue;
			auto p1 = s.lower_bound(b[j]);
			if (p1 == s.end()) {
				if (!s.empty()) rj.insert(b[j]-*(--p1)-1);
				s.insert(b[j]);
				gr[i][j] = {*s.begin(), m-*s.rbegin()-1};
			}
			else if (p1 == s.begin()) {
				rj.insert(*p1-b[j]-1);
				s.insert(b[j]);
				gr[i][j] = {*s.begin(), m-*s.rbegin()-1};
			}
			else {
				int x = *p1; --p1; int y = *p1;
				rj.erase(rj.find(x-y-1));
				rj.insert(x-b[j]-1);
				rj.insert(b[j]-y-1);
				s.insert(b[j]);
			}
			mem[i][j] = *rj.rbegin();
		}
	}
	
	//SOLVE O(N^3)
	ll mn = inf;
	for (auto x : v) {
		MQ m1, m2, m3;
		vector <pair <pii, ll> > vv;
		int l = 0, r = -1, z = 0;
		for (int i = 0; i < k; i++) {
			while (a[z]+x < a[i]) {
				if (vv.back().S != (ll)a[z]+x+1) {vv.pb({{l+1, r}, (ll)a[z]+x+1}); l++;}
				else vv[vv.size()-1].F.F++, l++;
				z++;
			}
			if (vv.empty() || vv.back().S != a[i]) {vv.pb({{l, r+1}, a[i]}); r++;}
			else vv[vv.size()-1].F.S++, r++;
		}
		while (z < k) {
			if (vv.back().S != (ll)a[z]+x+1) {vv.pb({{l+1, r}, (ll)a[z]+x+1}); l++;}
			else vv[vv.size()-1].F.F++, l++;
			z++;
		}
		z = 0;
		const ll oo = 1e18;
		#define C (x+max(m1.get(), m2.get()+m3.get()))
		
		for (int i = 0; i+1 < vv.size() && vv[i].S < 2*n; i++) {
			l = vv[i].F.F;
			r = vv[i].F.S;
			m1.push(mem[r][l]); m2.push(gr[r][l].F); m3.push(gr[r][l].S);
			while (vv[z].S+n-1 < vv[i+1].S) {
				mn = min(mn, C);
				m1.pop(); m2.pop(); m3.pop();
				z++;
			}
		}
	}
	
	cout << mn << "\n";
 
	return 0;
}

Compilation message

cultivation.cpp:3: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    3 | #pragma optimize("O3, unroll-loops")
      | 
cultivation.cpp: In function 'int main()':
cultivation.cpp:114:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  114 |   for (int i = 0; i+1 < vv.size() && vv[i].S < 2*n; i++) {
      |                   ~~~~^~~~~~~~~~~
cultivation.cpp:111:12: warning: unused variable 'oo' [-Wunused-variable]
  111 |   const ll oo = 1e18;
      |            ^~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 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 344 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 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 344 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 0 ms 604 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 600 KB Output is correct
22 Correct 2 ms 1116 KB Output is correct
23 Correct 0 ms 604 KB Output is correct
24 Correct 3 ms 1496 KB Output is correct
25 Correct 3 ms 1240 KB Output is correct
26 Correct 5 ms 2264 KB Output is correct
27 Correct 6 ms 2264 KB Output is correct
28 Correct 4 ms 1464 KB Output is correct
29 Correct 6 ms 2260 KB Output is correct
30 Correct 6 ms 2220 KB Output is correct
31 Correct 6 ms 2264 KB Output is correct
32 Correct 6 ms 2264 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 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 344 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 0 ms 604 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 600 KB Output is correct
22 Correct 2 ms 1116 KB Output is correct
23 Correct 0 ms 604 KB Output is correct
24 Correct 3 ms 1496 KB Output is correct
25 Correct 3 ms 1240 KB Output is correct
26 Correct 5 ms 2264 KB Output is correct
27 Correct 6 ms 2264 KB Output is correct
28 Correct 4 ms 1464 KB Output is correct
29 Correct 6 ms 2260 KB Output is correct
30 Correct 6 ms 2220 KB Output is correct
31 Correct 6 ms 2264 KB Output is correct
32 Correct 6 ms 2264 KB Output is correct
33 Correct 12 ms 2264 KB Output is correct
34 Correct 11 ms 2264 KB Output is correct
35 Correct 16 ms 2264 KB Output is correct
36 Correct 15 ms 2384 KB Output is correct
37 Correct 22 ms 2260 KB Output is correct
38 Correct 15 ms 2264 KB Output is correct
39 Correct 15 ms 2264 KB Output is correct
40 Correct 15 ms 2264 KB Output is correct
41 Correct 11 ms 2264 KB Output is correct
42 Correct 11 ms 2112 KB Output is correct
43 Correct 14 ms 2264 KB Output is correct
44 Correct 12 ms 2260 KB Output is correct

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 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 344 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 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 344 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 0 ms 604 KB Output is correct
20 Correct 1 ms 344 KB Output is correct
21 Correct 1 ms 600 KB Output is correct
22 Correct 2 ms 1116 KB Output is correct
23 Correct 0 ms 604 KB Output is correct
24 Correct 3 ms 1496 KB Output is correct
25 Correct 3 ms 1240 KB Output is correct
26 Correct 5 ms 2264 KB Output is correct
27 Correct 6 ms 2264 KB Output is correct
28 Correct 4 ms 1464 KB Output is correct
29 Correct 6 ms 2260 KB Output is correct
30 Correct 6 ms 2220 KB Output is correct
31 Correct 6 ms 2264 KB Output is correct
32 Correct 6 ms 2264 KB Output is correct
33 Correct 12 ms 2264 KB Output is correct
34 Correct 11 ms 2264 KB Output is correct
35 Correct 16 ms 2264 KB Output is correct
36 Correct 15 ms 2384 KB Output is correct
37 Correct 22 ms 2260 KB Output is correct
38 Correct 15 ms 2264 KB Output is correct
39 Correct 15 ms 2264 KB Output is correct
40 Correct 15 ms 2264 KB Output is correct
41 Correct 11 ms 2264 KB Output is correct
42 Correct 11 ms 2112 KB Output is correct
43 Correct 14 ms 2264 KB Output is correct
44 Correct 12 ms 2260 KB Output is correct
45 Incorrect 1 ms 348 KB Output isn't correct
46 Halted 0 ms 0 KB -