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Submission #1068000

# Submission time Handle Problem Language Result Execution time Memory
1068000 2024-08-21T06:33:08 Z sleepntsheep Wombats (IOI13_wombats) C++17
55 / 100
 20000 ms 20408 KB 
#pragma GCC optimize("O3,unroll-loops")
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cstring>
#include <vector>
#include <cassert>
using namespace std;

#include "wombats.h"

#ifndef ROW
#define ROW 5000
#endif

#define COL 200
constexpr int B = 200;

int r, c, h[ROW][COL], v[ROW + 1][COL];

int L[9999], R[9999], By[9999], a[COL][COL][COL], ans[COL][COL];

void calc(int blk) {
	for (int ii = 0; ii < c; ++ii) {
		static int dp[2][COL];
		/* find answer for (V1, V2) where V1 = ii */
		memset(dp[0], 63, sizeof dp[0]);
		dp[0][ii] = 0;
		int I = 0;

		for (int i = L[blk]; i <= R[blk]; ++i, I ^= 1) {
			static int pre[COL], suf[COL], ph[COL]; /* annoying ahh math */ 
			ph[0] = 0;
			for (int j = 0; j + 1 < c; ++j)
				ph[j + 1] = ph[j] + h[i][j];

			pre[0] = dp[I][0];
			for (int j = 1; j < c; ++j) pre[j] = min(pre[j - 1], dp[I][j] - ph[j]);
			suf[c - 1] = dp[I][c - 1] + ph[c - 1];
			for (int j = c - 2; j >= 0; --j) suf[j] = min(suf[j + 1], dp[I][j] + ph[j]);

			for (int j = 0; j < c; ++j)
				dp[I][j] = min(ph[j] + pre[j], suf[j] - ph[j]);
			for (int j = 0; j < c; ++j)
				dp[!I][j] = dp[I][j] + v[i][j];
		}
		for (int jj = 0; jj < c; ++jj)
			a[blk][ii][jj] = dp[I][jj];
	}
}

void merg(int up[COL][COL], int down[COL][COL], int out[COL][COL]) {
	static int buf[COL][COL];
	for (int i = 0; i < c; ++i) for (int j = 0; j < c; ++j) {
		buf[i][j] = 1e9;
		for (int k = 0; k < c; ++k)
			buf[i][j] = min({buf[i][j], up[i][k]+ down[k][j]});
	}
	for (int i = 0; i < c; ++i) for (int j = 0; j < c; ++j) out[i][j] = buf[i][j];
}

void CalcAns() {
	for (int i = 0; i < c; ++i) for (int j = 0; j < c; ++j) ans[i][j] = a[0][i][j];
	for (int i = 1; i * B < r; ++i)
		merg(ans, a[i], ans);
}

void changeH(int P, int Q, int W) {
	h[P][Q] = W;
	calc(By[P]);
	CalcAns();
}

void changeV(int P, int Q, int W) {
	v[P][Q] = W;
	calc(By[P]);
	CalcAns();
}

void init(int R, int C, int H[ROW][COL], int V[ROW][COL]) {
	r = R, c = C;
	for (int i = 0; i + 1 < r; ++i) for (int j = 0; j < c; ++j) v[i][j] = V[i][j];
	for (int i = 0 ; i < r; ++i) for (int j = 0; j + 1 < c; ++j) h[i][j] = H[i][j];

	for (int i = 0; i * B < r; ++i) {
		L[i] = i * B;
		::R[i] = min(r - 1, i * B + B - 1);
		calc(i);
		for (int j = L[i]; j <= ::R[i]; ++j) By[j] = i;
	}

	CalcAns();
}

int escape(int V1, int V2) { return ans[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 8284 KB Output is correct
2 Correct 4 ms 8284 KB Output is correct
3 Correct 82 ms 9752 KB Output is correct
4 Correct 4 ms 8280 KB Output is correct
5 Correct 4 ms 8284 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 416 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 37 ms 1552 KB Output is correct
12 Correct 1 ms 348 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 780 ms 856 KB Output is correct
2 Correct 700 ms 856 KB Output is correct
3 Correct 802 ms 856 KB Output is correct
4 Correct 799 ms 860 KB Output is correct
5 Correct 810 ms 856 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 4001 ms 940 KB Output is correct
10 Correct 0 ms 348 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 16220 KB Output is correct
2 Correct 16 ms 16216 KB Output is correct
3 Correct 19 ms 16220 KB Output is correct
4 Correct 33 ms 17028 KB Output is correct

Subtask #5
0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 809 ms 1096 KB Output is correct
2 Correct 699 ms 856 KB Output is correct
3 Correct 787 ms 1108 KB Output is correct
4 Correct 801 ms 920 KB Output is correct
5 Correct 772 ms 924 KB Output is correct
6 Correct 16 ms 16220 KB Output is correct
7 Correct 10 ms 16064 KB Output is correct
8 Correct 16 ms 16220 KB Output is correct
9 Correct 30 ms 16988 KB Output is correct
10 Correct 4 ms 8280 KB Output is correct
11 Correct 4 ms 8284 KB Output is correct
12 Correct 40 ms 9856 KB Output is correct
13 Correct 6 ms 8284 KB Output is correct
14 Correct 6 ms 8284 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 600 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 39 ms 1436 KB Output is correct
26 Correct 1 ms 344 KB Output is correct
27 Correct 3974 ms 920 KB Output is correct
28 Execution timed out 20029 ms 18364 KB Time limit exceeded
29 Halted 0 ms 0 KB -

Subtask #6
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 782 ms 1104 KB Output is correct
2 Correct 694 ms 860 KB Output is correct
3 Correct 786 ms 860 KB Output is correct
4 Correct 812 ms 860 KB Output is correct
5 Correct 759 ms 860 KB Output is correct
6 Correct 11 ms 16220 KB Output is correct
7 Correct 10 ms 16220 KB Output is correct
8 Correct 11 ms 16248 KB Output is correct
9 Correct 31 ms 16980 KB Output is correct
10 Correct 4 ms 8280 KB Output is correct
11 Correct 4 ms 8280 KB Output is correct
12 Correct 44 ms 9820 KB Output is correct
13 Correct 5 ms 8284 KB Output is correct
14 Correct 4 ms 8180 KB Output is correct
15 Correct 3451 ms 20152 KB Output is correct
16 Execution timed out 20045 ms 20408 KB Time limit exceeded
17 Halted 0 ms 0 KB -