Submission #591117

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
591117	2022-07-06T21:44:07 Z	GusterGoose27	The short shank; Redemption (BOI21_prison)	C++11	35 / 100	2000 ms	63076 KB

prison

#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 = 22;
//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 = 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:106:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  106 |   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	5 ms	340 KB	Output is correct
3	Correct	6 ms	392 KB	Output is correct
4	Correct	9 ms	340 KB	Output is correct
5	Correct	7 ms	340 KB	Output is correct
6	Correct	3 ms	340 KB	Output is correct
7	Correct	3 ms	340 KB	Output is correct
8	Correct	7 ms	400 KB	Output is correct
9	Correct	7 ms	400 KB	Output is correct
10	Correct	6 ms	340 KB	Output is correct
11	Correct	6 ms	340 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	2070 ms	63076 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	5 ms	340 KB	Output is correct
3	Correct	6 ms	392 KB	Output is correct
4	Correct	9 ms	340 KB	Output is correct
5	Correct	7 ms	340 KB	Output is correct
6	Correct	3 ms	340 KB	Output is correct
7	Correct	3 ms	340 KB	Output is correct
8	Correct	7 ms	400 KB	Output is correct
9	Correct	7 ms	400 KB	Output is correct
10	Correct	6 ms	340 KB	Output is correct
11	Correct	6 ms	340 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	5 ms	340 KB	Output is correct
14	Correct	6 ms	340 KB	Output is correct
15	Correct	6 ms	392 KB	Output is correct
16	Correct	7 ms	396 KB	Output is correct
17	Correct	3 ms	340 KB	Output is correct
18	Correct	3 ms	392 KB	Output is correct
19	Correct	8 ms	340 KB	Output is correct
20	Correct	6 ms	340 KB	Output is correct
21	Correct	6 ms	340 KB	Output is correct
22	Correct	8 ms	340 KB	Output is correct
23	Correct	64 ms	824 KB	Output is correct
24	Correct	61 ms	724 KB	Output is correct
25	Correct	60 ms	828 KB	Output is correct
26	Correct	60 ms	724 KB	Output is correct
27	Correct	60 ms	832 KB	Output is correct
28	Correct	65 ms	824 KB	Output is correct
29	Correct	62 ms	820 KB	Output is correct
30	Correct	58 ms	852 KB	Output is correct
31	Correct	56 ms	852 KB	Output is correct
32	Correct	54 ms	832 KB	Output is correct
33	Correct	53 ms	724 KB	Output is correct
34	Correct	33 ms	832 KB	Output is correct
35	Correct	63 ms	828 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	Correct	1737 ms	14276 KB	Output is correct
3	Correct	1802 ms	14272 KB	Output is correct
4	Correct	1635 ms	14964 KB	Output is correct
5	Correct	1519 ms	14748 KB	Output is correct
6	Correct	1521 ms	14920 KB	Output is correct
7	Correct	1434 ms	14620 KB	Output is correct
8	Correct	1399 ms	14736 KB	Output is correct
9	Incorrect	1383 ms	15080 KB	Output isn't correct
10	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	5 ms	340 KB	Output is correct
3	Correct	6 ms	392 KB	Output is correct
4	Correct	9 ms	340 KB	Output is correct
5	Correct	7 ms	340 KB	Output is correct
6	Correct	3 ms	340 KB	Output is correct
7	Correct	3 ms	340 KB	Output is correct
8	Correct	7 ms	400 KB	Output is correct
9	Correct	7 ms	400 KB	Output is correct
10	Correct	6 ms	340 KB	Output is correct
11	Correct	6 ms	340 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Correct	5 ms	340 KB	Output is correct
14	Correct	6 ms	340 KB	Output is correct
15	Correct	6 ms	392 KB	Output is correct
16	Correct	7 ms	396 KB	Output is correct
17	Correct	3 ms	340 KB	Output is correct
18	Correct	3 ms	392 KB	Output is correct
19	Correct	8 ms	340 KB	Output is correct
20	Correct	6 ms	340 KB	Output is correct
21	Correct	6 ms	340 KB	Output is correct
22	Correct	8 ms	340 KB	Output is correct
23	Correct	64 ms	824 KB	Output is correct
24	Correct	61 ms	724 KB	Output is correct
25	Correct	60 ms	828 KB	Output is correct
26	Correct	60 ms	724 KB	Output is correct
27	Correct	60 ms	832 KB	Output is correct
28	Correct	65 ms	824 KB	Output is correct
29	Correct	62 ms	820 KB	Output is correct
30	Correct	58 ms	852 KB	Output is correct
31	Correct	56 ms	852 KB	Output is correct
32	Correct	54 ms	832 KB	Output is correct
33	Correct	53 ms	724 KB	Output is correct
34	Correct	33 ms	832 KB	Output is correct
35	Correct	63 ms	828 KB	Output is correct
36	Correct	0 ms	212 KB	Output is correct
37	Correct	1737 ms	14276 KB	Output is correct
38	Correct	1802 ms	14272 KB	Output is correct
39	Correct	1635 ms	14964 KB	Output is correct
40	Correct	1519 ms	14748 KB	Output is correct
41	Correct	1521 ms	14920 KB	Output is correct
42	Correct	1434 ms	14620 KB	Output is correct
43	Correct	1399 ms	14736 KB	Output is correct
44	Incorrect	1383 ms	15080 KB	Output isn't correct
45	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	5 ms	340 KB	Output is correct
3	Correct	6 ms	392 KB	Output is correct
4	Correct	9 ms	340 KB	Output is correct
5	Correct	7 ms	340 KB	Output is correct
6	Correct	3 ms	340 KB	Output is correct
7	Correct	3 ms	340 KB	Output is correct
8	Correct	7 ms	400 KB	Output is correct
9	Correct	7 ms	400 KB	Output is correct
10	Correct	6 ms	340 KB	Output is correct
11	Correct	6 ms	340 KB	Output is correct
12	Correct	0 ms	212 KB	Output is correct
13	Execution timed out	2070 ms	63076 KB	Time limit exceeded
14	Halted	0 ms	0 KB	-

Submission #591117

Compilation message

Subtask #1 15.0 / 15.0

Subtask #2 0 / 10.0

Subtask #3 20.0 / 20.0

Subtask #4 0 / 10.0

Subtask #5 0 / 25.0

Subtask #6 0 / 20.0

Subtask #1
15.0 / 15.0

Subtask #2
0 / 10.0

Subtask #3
20.0 / 20.0

Subtask #4
0 / 10.0

Subtask #5
0 / 25.0

Subtask #6
0 / 20.0