Submission #763391

#	Time	Username	Problem	Language	Result	Execution time	Memory
763391		SanguineChameleon	Wombats (IOI13_wombats)	C++17	0 / 100	24 ms	34548 KiB

wombats

#include "wombats.h"
#include <bits/stdc++.h>
using namespace std;

const int inf = 1e9 + 20;
const int maxN = 5e3 + 20;
const int maxM = 2e2 + 20;
const int maxB = 1e3 + 20;
int hor[maxN][maxM];
int ver[maxN][maxM];
int tmp[maxM][maxM];
int dp[maxM][maxM];
int tree[maxB][maxM][maxM];
int N, M;

void calc(int id, int lt, int rt) {
	for (int X = 0; X < M; X++) {
		dp[lt][X] = 0;
		for (int i = X - 1; i >= 0; i--) {
			dp[lt][i] = dp[lt][i + 1] + hor[lt][i];
		}
		for (int i = X + 1; i < M; i++) {
			dp[lt][i] = dp[lt][i - 1] + hor[lt][i - 1];
		}
		for (int i = lt + 1; i <= rt; i++) {
			for (int j = 0; j < M; j++) {
				tmp[i][j] = dp[i - 1][j] + ver[i - 1][j];
				dp[i][j] = tmp[i][j];
			}
			int best = tmp[i][0];
			for (int j = 1; j < M; j++) {
				best = min(best + hor[i][j - 1], tmp[i][j]);
				dp[i][j] = min(dp[i][j], best);
			}
			best = tmp[i][M - 1];
			for (int j = M - 2; j >= 0; j--) {
				best = min(best + hor[i][j], tmp[i][j]);
				dp[i][j] = min(dp[i][j], best);
			}
		}
		for (int Y = 0; Y < M; Y++) {
			assert(X == 0 && Y == 0);
			tree[id][X][Y] = dp[rt][Y];
		}
	}
}

void init(int R, int C, int H[5000][200], int V[5000][200]) {
	N = R;
	M = C;
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < M - 1; j++) {
			hor[i][j] = H[i][j];
		}
	}
	for (int i = 0; i < N - 1; i++) {
		for (int j = 0; j < M; j++) {
			ver[i][j] = V[i][j];
		}
	}
	calc(1, 0, N - 1);
}

void changeH(int P, int Q, int W) {
	hor[P][Q] = W;
	calc(1, 0, N - 1);
}

void changeV(int P, int Q, int W) {
	ver[P][Q] = W;
	calc(1, 0, N - 1);
}

int escape(int X, int Y) {
	return tree[1][X][Y];
}

Compilation message (stderr)

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: 0 / 9
• Subtask 2: 0 / 12
• Subtask 3: 0 / 16
• Subtask 4: 0 / 18
• Subtask 5: 0 / 21
• Subtask 6: 0 / 24