oj.uz

Submission #1069956

# Submission time Handle Problem Language Result Execution time Memory
1069956 2024-08-22T10:36:10 Z Arapak Radio Towers (IOI22_towers) C++17
11 / 100
 4000 ms 7864 KB 
#include "towers.h"
#include "bits/stdc++.h"
using namespace std;

#define rep(i,a,b) for(int i=(a);i<(b);++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)x.size()
typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;

#ifdef DEBUG
auto& operator<<(auto &os, const pair<auto,auto> &p) {
	return os<<"("<<p.first<<", "<<p.second<<")";
}
auto& operator<<(auto &os, const auto &v) {
	os<<"{";
	for(auto it=begin(v);it!=end(v);++it) {
		if(it != begin(v)) os<<", ";
		os<<(*it);
	}
	return os<<"}";
}

void dbg_out(auto... x) {
	((cerr<<' '<<x), ...) << endl;
}
#define dbg(x...) cerr<<"("<<#x<<"):", dbg_out(x);
#else
#define dbg(...)
#endif

struct SegTree {
	int n;
	vi tree;
	vi ind;
	SegTree(vi vals) {
		n = sz(vals);
		tree.resize(2*n);
		ind.resize(2*n);
		rep(i,0,n) {
			tree[n+i] = vals[i];
			ind[n+i] = i;
		}
		for(int i=n-1;i>0;i--) {
			tree[i] = max(tree[i*2], tree[i*2+1]);
			ind[i] = tree[i] == tree[i*2] ? ind[i*2] : ind[i*2+1];
		}
	}

	int query(int l, int r) {
		dbg(l, r);
		int res = 0;
		int index = -1;
		l += n;
		r += n;
		for(;l < r;l /= 2, r /= 2) {
			dbg(l, r);
			if(l&1) {
				if(tree[l] > res) {
					res = tree[l];
					index = ind[l];
				}
				l++;
			}
			if(r&1) {
				--r;
				if(tree[r] > res) {
					res = tree[r];
					index = ind[r];
				}
			}
		}
		return index;
	}
};

const int inf = 1e9 + 7;

SegTree *tree;
int n, root;
vi h;
vi L, R, siz;

int get_max(int l, int r) {
	return tree->query(l, r);
}

int build_tree(int l, int r) {
	if(l == r) return -1;
	if(l+1 == r) {
		siz[l] = 1;
		return l;
	}
	int index = get_max(l, r);
	L[index] = build_tree(l, index);
	R[index] = build_tree(index+1, r);
	siz[index] = (L[index] == -1 ? 0 : siz[L[index]]) 
				+(R[index] == -1 ? 0 : siz[R[index]]);
	return index;
}

void init(int N, vi H) {
	n = N;
	h = H;
	L.resize(n);
	R.resize(n);
	siz.assign(n, 0);
	tree = new SegTree(h);
	root = build_tree(0, n);
	dbg(root);
	dbg(L);
	dbg(R);
}

int solve(int v, int l, int r, int a, int b, int d, int maxi) {
	if(l == r || r <= a || b <= l) return 0;
	dbg(v, l, r, a, b, d, maxi);
	if(l+1 == r) return h[v] <= maxi;
	int res = 0;
	if(L[v] == -1 || v < a)
		res += solve(R[v], v+1, r, a, b, d, maxi);
	else if(R[v] == -1 || v >= b)
		res += solve(L[v], l, v, a, b, d, maxi);
	else {
		res += solve(L[v], l  , v, a, b, d, min(maxi, h[v] - d));
		res += solve(R[v], v+1, r, a, b, d, min(maxi, h[v] - d));
	
		res = max(res, solve(R[v], v+1, r, a, b, d, maxi));
		res = max(res, solve(L[v], l, v, a, b, d, maxi));
	}
	if(res == 0 && (a <= v && v < b && h[v] <= maxi))
		return 1;
	return res;
}

int max_towers(int L, int R, int D) {
	int res = solve(root, 0, n, L, R+1, D, inf);
	return res == 0 ? 1 : res;
}

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4085 ms 7864 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 20 ms 516 KB Output is correct
3 Correct 24 ms 344 KB Output is correct
4 Correct 569 ms 344 KB Output is correct
5 Correct 123 ms 344 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 28 ms 512 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 0 ms 600 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 0 ms 600 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 103 ms 344 KB Output is correct
17 Correct 9 ms 596 KB Output is correct
18 Correct 1 ms 600 KB Output is correct
19 Correct 1 ms 600 KB Output is correct
20 Correct 103 ms 344 KB Output is correct
21 Correct 390 ms 344 KB Output is correct
22 Correct 176 ms 344 KB Output is correct
23 Correct 1 ms 600 KB Output is correct
24 Correct 1 ms 600 KB Output is correct
25 Correct 52 ms 344 KB Output is correct
26 Correct 82 ms 344 KB Output is correct
27 Correct 610 ms 344 KB Output is correct
28 Correct 709 ms 344 KB Output is correct
29 Correct 662 ms 344 KB Output is correct
30 Correct 2344 ms 496 KB Output is correct
31 Correct 334 ms 344 KB Output is correct
32 Correct 1 ms 600 KB Output is correct
33 Correct 1 ms 600 KB Output is correct
34 Correct 0 ms 600 KB Output is correct
35 Correct 1 ms 600 KB Output is correct

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 20 ms 516 KB Output is correct
3 Correct 24 ms 344 KB Output is correct
4 Correct 569 ms 344 KB Output is correct
5 Correct 123 ms 344 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 28 ms 512 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 0 ms 600 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 0 ms 600 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 103 ms 344 KB Output is correct
17 Correct 9 ms 596 KB Output is correct
18 Correct 1 ms 600 KB Output is correct
19 Correct 1 ms 600 KB Output is correct
20 Correct 103 ms 344 KB Output is correct
21 Correct 390 ms 344 KB Output is correct
22 Correct 176 ms 344 KB Output is correct
23 Correct 1 ms 600 KB Output is correct
24 Correct 1 ms 600 KB Output is correct
25 Correct 52 ms 344 KB Output is correct
26 Correct 82 ms 344 KB Output is correct
27 Correct 610 ms 344 KB Output is correct
28 Correct 709 ms 344 KB Output is correct
29 Correct 662 ms 344 KB Output is correct
30 Correct 2344 ms 496 KB Output is correct
31 Correct 334 ms 344 KB Output is correct
32 Correct 1 ms 600 KB Output is correct
33 Correct 1 ms 600 KB Output is correct
34 Correct 0 ms 600 KB Output is correct
35 Correct 1 ms 600 KB Output is correct
36 Execution timed out 4038 ms 3160 KB Time limit exceeded
37 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4038 ms 4696 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4061 ms 1368 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 20 ms 516 KB Output is correct
3 Correct 24 ms 344 KB Output is correct
4 Correct 569 ms 344 KB Output is correct
5 Correct 123 ms 344 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 28 ms 512 KB Output is correct
8 Correct 1 ms 600 KB Output is correct
9 Correct 0 ms 600 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 0 ms 344 KB Output is correct
13 Correct 1 ms 600 KB Output is correct
14 Correct 0 ms 600 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 103 ms 344 KB Output is correct
17 Correct 9 ms 596 KB Output is correct
18 Correct 1 ms 600 KB Output is correct
19 Correct 1 ms 600 KB Output is correct
20 Correct 103 ms 344 KB Output is correct
21 Correct 390 ms 344 KB Output is correct
22 Correct 176 ms 344 KB Output is correct
23 Correct 1 ms 600 KB Output is correct
24 Correct 1 ms 600 KB Output is correct
25 Correct 52 ms 344 KB Output is correct
26 Correct 82 ms 344 KB Output is correct
27 Correct 610 ms 344 KB Output is correct
28 Correct 709 ms 344 KB Output is correct
29 Correct 662 ms 344 KB Output is correct
30 Correct 2344 ms 496 KB Output is correct
31 Correct 334 ms 344 KB Output is correct
32 Correct 1 ms 600 KB Output is correct
33 Correct 1 ms 600 KB Output is correct
34 Correct 0 ms 600 KB Output is correct
35 Correct 1 ms 600 KB Output is correct
36 Execution timed out 4038 ms 3160 KB Time limit exceeded
37 Halted 0 ms 0 KB -

Subtask #7
0 / 23.0

# Verdict Execution time Memory Grader output
1 Execution timed out 4085 ms 7864 KB Time limit exceeded
2 Halted 0 ms 0 KB -