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Submission #591027

# Submission time Handle Problem Language Result Execution time Memory
591027 2022-07-06T18:27:51 Z Temmie Wombats (IOI13_wombats) C++17
76 / 100
 20000 ms 81832 KB 
#include "wombats.h"
#include <bits/stdc++.h>

constexpr const int BS = 30;

int r, c;
std::vector <std::vector <int>> h, v;

struct Block {
	
	int sc = -1, ec = -1;
	std::vector <std::vector <int>> con;
	
	Block(bool empty = false) :
	con(!empty * c, std::vector <int> (c, 1 << 30))
	{ }
	
	void update(int _sc, int _ec) {
		sc = _sc;
		ec = _ec;
		for (int i = 0; i < c; i++) {
			for (int j = 0; j < c; j++) {
				con[i][j] = 1 << 30;
			}
		}
		for (int j = 0; j < c; j++) {
			con[j][j] = 0;
		}
		for (int i = ec; i >= sc; i--) {
			std::vector <std::vector <int>> nxt(c, std::vector <int> (c, 1 << 30));
			if (i == ec) {
				for (int j = 0; j < c; j++) {
					nxt[j][j] = 0;
				}
			}
			for (int j = 0; j < c; j++) {
				if (i != ec) {
					for (int k = 0; k < c; k++) {
						nxt[j][k] = std::min(nxt[j][k], con[j][k] + v[i][j]);
					}
				}
				if (j) {
					for (int k = 0; k < c; k++) {
						nxt[j][k] = std::min(nxt[j][k], nxt[j - 1][k] + h[i][j - 1]);
					}
				}
			}
			for (int j = c - 1; j >= 0; j--) {
				if (j + 1 < c) {
					for (int k = 0; k < c; k++) {
						nxt[j][k] = std::min(nxt[j][k], nxt[j + 1][k] + h[i][j]);
					}
				}
			}
			std::swap(con, nxt);
		}
	}
	
	friend Block merge(const Block& upper, const Block& lower) {
		if (!upper.con.empty() && lower.con.empty()) {
			return upper;
		}
		if (upper.con.empty()) {
			assert(lower.con.empty());
			return Block(true);
		}
		Block res;
		res.sc = upper.sc;
		res.ec = lower.ec;
		std::vector <std::vector <int>> ine(c, std::vector <int> (c, 1 << 30));
		{
			for (int j = 0; j < c; j++) {
				for (int k = 0; k < c; k++) {
					ine[j][k] = std::min(ine[j][k], lower.con[j][k] + v[upper.ec][j]);
				}
				if (j) {
					for (int k = 0; k < c; k++) {
						ine[j][k] = std::min(ine[j][k], ine[j - 1][k] + h[upper.ec][j - 1]);
					}
				}
			}
			for (int j = c - 1; j >= 0; j--) {
				if (j + 1 < c) {
					for (int k = 0; k < c; k++) {
						ine[j][k] = std::min(ine[j][k], ine[j + 1][k] + h[upper.ec][j]);
					}
				}
			}
		}
		for (int i = 0; i < c; i++) {
			for (int j = 0; j < c; j++) {
				for (int k = 0; k < c; k++) {
					res.con[i][k] = std::min(res.con[i][k], upper.con[i][j] + ine[j][k]);
				}
			}
		}
		return res;
	}
	
};

struct Seg {
	
	int size;
	std::vector <Block> v;
	
	Seg(int s) {
		size = 1;
		while (size < s) {
			size <<= 1;
		}
		v.resize(size << 1, Block(true));
		build(0, 0, size);
	}
	
	void build(int now, int li, int ri) {
		if (!(ri - li - 1)) {
			if (li * BS < r) {
				v[now] = Block();
				v[now].update(li * BS, std::min(r - 1, (li + 1) * BS - 1));
			}
			return;
		}
		int mid = (li + ri) >> 1;
		build(now * 2 + 1, li, mid);
		build(now * 2 + 2, mid, ri);
		v[now] = merge(v[now * 2 + 1], v[now * 2 + 2]);
	}
	
	void update(int ind) {
		update(ind, 0, 0, size);
	}
	
	void update(int ind, int now, int li, int ri) {
		if (!(ri - li - 1)) {
			v[now].update(ind * BS, std::min(r - 1, (ind + 1) * BS - 1));
			return;
		}
		int mid = (li + ri) >> 1;
		if (ind < mid) {
			update(ind, now * 2 + 1, li, mid);
		} else {
			update(ind, now * 2 + 2, mid, ri);
		}
		v[now] = merge(v[now * 2 + 1], v[now * 2 + 2]);
	}
	
};

Seg* seg;

void init(int R, int C, int H[5000][200], int V[5000][200]) {
	r = R;
	c = C;
	h.resize(r, std::vector <int> (c - 1));
	v.resize(r - 1, std::vector <int> (c));
	for (int i = 0; i < r; i++) {
		for (int j = 0; j < c; j++) {
			if (j < c - 1) {
				h[i][j] = H[i][j];
			}
			if (i < r - 1) {
				v[i][j] = V[i][j];
			}
		}
	}
	seg = new Seg((r + BS - 1) / BS);
}

void changeH(int p, int q, int w) {
	h[p][q] = w;
	seg->update(p / BS);
}

void changeV(int p, int q, int w) {
	v[p][q] = w;
	seg->update(p / BS);
}

int escape(int v1, int v2) {
	return seg->v[0].con[v1][v2];
}

Compilation message

grader.c: In function 'int main()':
grader.c:15:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
   15 |  int res;
      |      ^~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4652 KB Output is correct
2 Correct 5 ms 4564 KB Output is correct
3 Correct 72 ms 6120 KB Output is correct
4 Correct 5 ms 4564 KB Output is correct
5 Correct 4 ms 4564 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 67 ms 1280 KB Output is correct
12 Correct 1 ms 340 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 297 ms 852 KB Output is correct
2 Correct 311 ms 920 KB Output is correct
3 Correct 320 ms 932 KB Output is correct
4 Correct 335 ms 932 KB Output is correct
5 Correct 323 ms 924 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 1654 ms 940 KB Output is correct
10 Correct 0 ms 212 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 8728 KB Output is correct
2 Correct 9 ms 8660 KB Output is correct
3 Correct 9 ms 8660 KB Output is correct
4 Correct 41 ms 9452 KB Output is correct

Subtask #5
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 309 ms 928 KB Output is correct
2 Correct 312 ms 924 KB Output is correct
3 Correct 354 ms 1052 KB Output is correct
4 Correct 313 ms 936 KB Output is correct
5 Correct 315 ms 924 KB Output is correct
6 Correct 8 ms 8660 KB Output is correct
7 Correct 8 ms 8660 KB Output is correct
8 Correct 8 ms 8660 KB Output is correct
9 Correct 40 ms 9512 KB Output is correct
10 Correct 4 ms 4628 KB Output is correct
11 Correct 4 ms 4640 KB Output is correct
12 Correct 65 ms 6220 KB Output is correct
13 Correct 4 ms 4564 KB Output is correct
14 Correct 5 ms 4564 KB Output is correct
15 Correct 0 ms 260 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 1 ms 212 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 61 ms 1228 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1620 ms 944 KB Output is correct
28 Correct 4939 ms 27416 KB Output is correct
29 Correct 5357 ms 22804 KB Output is correct
30 Correct 4617 ms 22756 KB Output is correct
31 Correct 5124 ms 28384 KB Output is correct
32 Correct 0 ms 212 KB Output is correct

Subtask #6
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 299 ms 980 KB Output is correct
2 Correct 306 ms 920 KB Output is correct
3 Correct 311 ms 940 KB Output is correct
4 Correct 339 ms 1052 KB Output is correct
5 Correct 314 ms 936 KB Output is correct
6 Correct 8 ms 8660 KB Output is correct
7 Correct 9 ms 8660 KB Output is correct
8 Correct 8 ms 8660 KB Output is correct
9 Correct 40 ms 9400 KB Output is correct
10 Correct 7 ms 4652 KB Output is correct
11 Correct 5 ms 4564 KB Output is correct
12 Correct 67 ms 6156 KB Output is correct
13 Correct 5 ms 4564 KB Output is correct
14 Correct 6 ms 4564 KB Output is correct
15 Correct 2350 ms 81832 KB Output is correct
16 Execution timed out 20063 ms 81820 KB Time limit exceeded
17 Halted 0 ms 0 KB -