oj.uz

Submission #591123

# Submission time Handle Problem Language Result Execution time Memory
591123 2022-07-06T21:48:35 Z GusterGoose27 The short shank; Redemption (BOI21_prison) C++11
35 / 100
 2000 ms 63044 KB 
#pragma GCC optimize ("O3")

#include <bits/stdc++.h>

using namespace std;

typedef long double ld;
typedef pair<ld, int> pdi;
typedef pair<int, int> pii;

const int MAXN = 2e6;
pdi dp[MAXN];
const int inf = 1e9;
int n, d, t;
int vals[MAXN];

class STree {
public:
	int n;
	pdi *mn;
	int *lz;
	int *lval;
	int *rval;
	STree() {}
	STree(int nn) {
		n = pow(2, ceil(log2(nn)));
		mn = new pdi[2*n];
		lz = new int[2*n];
		lval = new int[2*n];
		rval = new int[2*n];
		for (int i = 1; i < 2*n; i++) mn[i] = pdi(inf, 0);
		fill(lz, lz+2*n, 0);
		for (int i = n; i < 2*n; i++) {
			lval[i] = i-n;
			rval[i] = i-n+1;
		}
		for (int i = n-1; i > 0; i--) {
			lval[i] = lval[2*i];
			rval[i] = rval[2*i+1];
		}
	}
	void clean() {
		for (int i = 1; i < 2*n; i++) mn[i] = pdi(inf, 0);
		fill(lz, lz+2*n, 0);
	}
	void increment(int l, int r, int v, int cur = 1) {
		if (lval[cur] >= r || rval[cur] <= l) return;
		if (lval[cur] >= l && rval[cur] <= r) {
			lz[cur] += v;
			mn[cur].first += v;
			return;
		}
		increment(l, r, v, 2*cur);
		increment(l, r, v, 2*cur+1);
		mn[cur] = min(mn[2*cur], mn[2*cur+1]);
		mn[cur].first += lz[cur];
	}
	pdi mnval(int l, int r, int cur = 1, int laz = 0) {
		if (lval[cur] >= r || rval[cur] <= l) return pdi(inf, 0);
		if (lval[cur] >= l && rval[cur] <= r) return pdi(mn[cur].first+laz, mn[cur].second);
		laz += lz[cur];
		return min(mnval(l, r, 2*cur, laz), mnval(l, r, 2*cur+1, laz));
	}
	void update(int i, pdi v, int cur = 1, int laz = 0) {
		if (lval[cur] > i || rval[cur] <= i) return;
		if (cur >= n) {
			mn[cur] = pdi(v.first-laz, v.second);
			return;
		}
		laz += lz[cur];
		update(i, v, 2*cur, laz);
		update(i, v, 2*cur+1, laz);
		mn[cur] = min(mn[2*cur], mn[2*cur+1]);
		mn[cur].first += lz[cur];
	}
};

STree s;

const int iters = 30;
//const ld prec = 3e-2;

int get_int(int i) {
	if (vals[i] > t) return i;
	return i+(t-vals[i])+1;
}

bool make_iter(ld &mn, ld &mx, bool force = 0) {
	vector<int> uncolored;
	//STree s(n);
	ld cost = (mn+mx)/2;
	for (int i = n-1; i >= 0; i--) {
		if (i == n-1) dp[i] = pdi(0, 0);
		else {
			pdi mnval = s.mnval(i+1, n);
			mnval.first += cost;
			mnval.second++;
			dp[i] = mnval;
		}
		s.update(i, dp[i]);
		uncolored.push_back(i);
		int r = get_int(i);
		int pos = uncolored.size()-1;
		while (pos >= 0 && uncolored[pos] < r) pos--;
		pos++;
		int prev = n;
		int mult = uncolored.size()-pos;
		for (int i = pos; i < uncolored.size(); i++) {
			s.increment(uncolored[i], prev, mult);
			prev = uncolored[i];
			mult--;
		}
		int num = uncolored.size()-pos;
		for (int i = 0; i < num; i++) uncolored.pop_back();
	}
	pdi overall = s.mnval(0, n);
	if (overall.second == d || force) { // we are done
		cout << round(overall.first-cost*d) << "\n";
		return 1;
	}
	if (overall.second < d) mx = cost;
	else mn = cost;
	return 0;
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(NULL);
	cin >> n >> d >> t;
	for (int i = 0; i < n; i++) cin >> vals[i];
	ld mn = 0;
	ld mx = /*((ld)n)/d+1*/n;
	s = STree(n);
	for (int t = 0; t < iters; t++) {
	//while (mx-mn > prec) {
		bool fin = make_iter(mn, mx);
		if (fin) return 0;
		s.clean();
	}
	//assert(false);
	make_iter(mn, mx, 1);
}

Compilation message

prison.cpp: In function 'bool make_iter(ld&, ld&, bool)':
prison.cpp:108:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  108 |   for (int i = pos; i < uncolored.size(); i++) {
      |                     ~~^~~~~~~~~~~~~~~~~~

Subtask #1
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 7 ms 388 KB Output is correct
3 Correct 7 ms 340 KB Output is correct
4 Correct 8 ms 388 KB Output is correct
5 Correct 9 ms 396 KB Output is correct
6 Correct 3 ms 340 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 8 ms 340 KB Output is correct
9 Correct 11 ms 404 KB Output is correct
10 Correct 10 ms 404 KB Output is correct
11 Correct 9 ms 396 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Execution timed out 2078 ms 63044 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 7 ms 388 KB Output is correct
3 Correct 7 ms 340 KB Output is correct
4 Correct 8 ms 388 KB Output is correct
5 Correct 9 ms 396 KB Output is correct
6 Correct 3 ms 340 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 8 ms 340 KB Output is correct
9 Correct 11 ms 404 KB Output is correct
10 Correct 10 ms 404 KB Output is correct
11 Correct 9 ms 396 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 8 ms 340 KB Output is correct
14 Correct 7 ms 340 KB Output is correct
15 Correct 11 ms 340 KB Output is correct
16 Correct 9 ms 396 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 3 ms 392 KB Output is correct
19 Correct 8 ms 340 KB Output is correct
20 Correct 8 ms 340 KB Output is correct
21 Correct 7 ms 340 KB Output is correct
22 Correct 8 ms 340 KB Output is correct
23 Correct 88 ms 824 KB Output is correct
24 Correct 96 ms 820 KB Output is correct
25 Correct 81 ms 724 KB Output is correct
26 Correct 81 ms 724 KB Output is correct
27 Correct 79 ms 824 KB Output is correct
28 Correct 82 ms 824 KB Output is correct
29 Correct 83 ms 844 KB Output is correct
30 Correct 71 ms 852 KB Output is correct
31 Correct 72 ms 852 KB Output is correct
32 Correct 72 ms 724 KB Output is correct
33 Correct 70 ms 852 KB Output is correct
34 Correct 29 ms 724 KB Output is correct
35 Correct 80 ms 724 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Execution timed out 2090 ms 14196 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 7 ms 388 KB Output is correct
3 Correct 7 ms 340 KB Output is correct
4 Correct 8 ms 388 KB Output is correct
5 Correct 9 ms 396 KB Output is correct
6 Correct 3 ms 340 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 8 ms 340 KB Output is correct
9 Correct 11 ms 404 KB Output is correct
10 Correct 10 ms 404 KB Output is correct
11 Correct 9 ms 396 KB Output is correct
12 Correct 1 ms 212 KB Output is correct
13 Correct 8 ms 340 KB Output is correct
14 Correct 7 ms 340 KB Output is correct
15 Correct 11 ms 340 KB Output is correct
16 Correct 9 ms 396 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 3 ms 392 KB Output is correct
19 Correct 8 ms 340 KB Output is correct
20 Correct 8 ms 340 KB Output is correct
21 Correct 7 ms 340 KB Output is correct
22 Correct 8 ms 340 KB Output is correct
23 Correct 88 ms 824 KB Output is correct
24 Correct 96 ms 820 KB Output is correct
25 Correct 81 ms 724 KB Output is correct
26 Correct 81 ms 724 KB Output is correct
27 Correct 79 ms 824 KB Output is correct
28 Correct 82 ms 824 KB Output is correct
29 Correct 83 ms 844 KB Output is correct
30 Correct 71 ms 852 KB Output is correct
31 Correct 72 ms 852 KB Output is correct
32 Correct 72 ms 724 KB Output is correct
33 Correct 70 ms 852 KB Output is correct
34 Correct 29 ms 724 KB Output is correct
35 Correct 80 ms 724 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Execution timed out 2090 ms 14196 KB Time limit exceeded
38 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 7 ms 388 KB Output is correct
3 Correct 7 ms 340 KB Output is correct
4 Correct 8 ms 388 KB Output is correct
5 Correct 9 ms 396 KB Output is correct
6 Correct 3 ms 340 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 8 ms 340 KB Output is correct
9 Correct 11 ms 404 KB Output is correct
10 Correct 10 ms 404 KB Output is correct
11 Correct 9 ms 396 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Execution timed out 2078 ms 63044 KB Time limit exceeded
14 Halted 0 ms 0 KB -