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Submission #591122

# Submission time Handle Problem Language Result Execution time Memory
591122 2022-07-06T21:46:49 Z GusterGoose27 The short shank; Redemption (BOI21_prison) C++11
45 / 100
 2000 ms 63124 KB 
#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 = 25;
//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: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 7 ms 392 KB Output is correct
3 Correct 7 ms 340 KB Output is correct
4 Correct 7 ms 340 KB Output is correct
5 Correct 8 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 340 KB Output is correct
9 Correct 7 ms 400 KB Output is correct
10 Correct 7 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 2098 ms 63124 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 392 KB Output is correct
3 Correct 7 ms 340 KB Output is correct
4 Correct 7 ms 340 KB Output is correct
5 Correct 8 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 340 KB Output is correct
9 Correct 7 ms 400 KB Output is correct
10 Correct 7 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 7 ms 340 KB Output is correct
14 Correct 7 ms 388 KB Output is correct
15 Correct 8 ms 340 KB Output is correct
16 Correct 10 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 6 ms 340 KB Output is correct
20 Correct 7 ms 340 KB Output is correct
21 Correct 6 ms 340 KB Output is correct
22 Correct 6 ms 340 KB Output is correct
23 Correct 72 ms 724 KB Output is correct
24 Correct 71 ms 724 KB Output is correct
25 Correct 78 ms 816 KB Output is correct
26 Correct 86 ms 824 KB Output is correct
27 Correct 68 ms 724 KB Output is correct
28 Correct 70 ms 824 KB Output is correct
29 Correct 67 ms 824 KB Output is correct
30 Correct 65 ms 852 KB Output is correct
31 Correct 67 ms 852 KB Output is correct
32 Correct 60 ms 724 KB Output is correct
33 Correct 61 ms 724 KB Output is correct
34 Correct 30 ms 840 KB Output is correct
35 Correct 68 ms 832 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1931 ms 14276 KB Output is correct
3 Correct 1944 ms 14288 KB Output is correct
4 Correct 1847 ms 14864 KB Output is correct
5 Correct 1748 ms 14736 KB Output is correct
6 Correct 1704 ms 14796 KB Output is correct
7 Correct 1640 ms 14564 KB Output is correct
8 Correct 1559 ms 14792 KB Output is correct
9 Correct 1615 ms 15176 KB Output is correct
10 Correct 1845 ms 14332 KB Output is correct

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 7 ms 392 KB Output is correct
3 Correct 7 ms 340 KB Output is correct
4 Correct 7 ms 340 KB Output is correct
5 Correct 8 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 340 KB Output is correct
9 Correct 7 ms 400 KB Output is correct
10 Correct 7 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 7 ms 340 KB Output is correct
14 Correct 7 ms 388 KB Output is correct
15 Correct 8 ms 340 KB Output is correct
16 Correct 10 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 6 ms 340 KB Output is correct
20 Correct 7 ms 340 KB Output is correct
21 Correct 6 ms 340 KB Output is correct
22 Correct 6 ms 340 KB Output is correct
23 Correct 72 ms 724 KB Output is correct
24 Correct 71 ms 724 KB Output is correct
25 Correct 78 ms 816 KB Output is correct
26 Correct 86 ms 824 KB Output is correct
27 Correct 68 ms 724 KB Output is correct
28 Correct 70 ms 824 KB Output is correct
29 Correct 67 ms 824 KB Output is correct
30 Correct 65 ms 852 KB Output is correct
31 Correct 67 ms 852 KB Output is correct
32 Correct 60 ms 724 KB Output is correct
33 Correct 61 ms 724 KB Output is correct
34 Correct 30 ms 840 KB Output is correct
35 Correct 68 ms 832 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 1931 ms 14276 KB Output is correct
38 Correct 1944 ms 14288 KB Output is correct
39 Correct 1847 ms 14864 KB Output is correct
40 Correct 1748 ms 14736 KB Output is correct
41 Correct 1704 ms 14796 KB Output is correct
42 Correct 1640 ms 14564 KB Output is correct
43 Correct 1559 ms 14792 KB Output is correct
44 Correct 1615 ms 15176 KB Output is correct
45 Correct 1845 ms 14332 KB Output is correct
46 Correct 0 ms 212 KB Output is correct
47 Correct 7 ms 468 KB Output is correct
48 Correct 6 ms 340 KB Output is correct
49 Correct 10 ms 400 KB Output is correct
50 Correct 8 ms 340 KB Output is correct
51 Correct 3 ms 340 KB Output is correct
52 Correct 3 ms 340 KB Output is correct
53 Correct 8 ms 396 KB Output is correct
54 Correct 7 ms 340 KB Output is correct
55 Correct 6 ms 340 KB Output is correct
56 Correct 6 ms 340 KB Output is correct
57 Correct 68 ms 724 KB Output is correct
58 Correct 70 ms 828 KB Output is correct
59 Correct 72 ms 824 KB Output is correct
60 Correct 80 ms 824 KB Output is correct
61 Correct 67 ms 824 KB Output is correct
62 Correct 70 ms 820 KB Output is correct
63 Correct 73 ms 724 KB Output is correct
64 Correct 59 ms 852 KB Output is correct
65 Correct 65 ms 852 KB Output is correct
66 Correct 63 ms 724 KB Output is correct
67 Correct 60 ms 724 KB Output is correct
68 Correct 30 ms 848 KB Output is correct
69 Correct 68 ms 852 KB Output is correct
70 Correct 0 ms 212 KB Output is correct
71 Correct 1880 ms 14268 KB Output is correct
72 Correct 1994 ms 14276 KB Output is correct
73 Correct 1835 ms 14832 KB Output is correct
74 Correct 1737 ms 14820 KB Output is correct
75 Correct 1700 ms 14936 KB Output is correct
76 Correct 1587 ms 14608 KB Output is correct
77 Correct 1618 ms 14788 KB Output is correct
78 Correct 1649 ms 15092 KB Output is correct
79 Correct 1798 ms 14340 KB Output is correct
80 Incorrect 1935 ms 14272 KB Output isn't correct
81 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 392 KB Output is correct
3 Correct 7 ms 340 KB Output is correct
4 Correct 7 ms 340 KB Output is correct
5 Correct 8 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 340 KB Output is correct
9 Correct 7 ms 400 KB Output is correct
10 Correct 7 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 2098 ms 63124 KB Time limit exceeded
14 Halted 0 ms 0 KB -