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답안 #67595

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
67595 2018-08-15T05:16:16 Z Crown 웜뱃 (IOI13_wombats) C++14
76 / 100
 19898 ms 263168 KB 
#include "wombats.h"
#include <bits/stdc++.h>
using namespace std;
#define X first
#define Y second
#define pb push_back
typedef pair<int, int> ii;
typedef long long ll;

int n, m;
const int maxn = 5005;
const int maxm = 205;
int H[maxn][maxm], V[maxn][maxm];

struct node
{
	vector< vector<int> > dist;
	node(){}
	node(bool create)
	{
		if(create)
		{
			dist.assign(m, vector<int>(m, 1e9));
			for(int i = 0; i< m; i++) dist[i][i] = 0;
		}
	}
};

node st[4*maxn];

const int ub = 4;

void dijk(int s, int r1, int r2, vector<int> &dist)
{
	vector<vector<int> > tod(r2-r1+1, vector<int>(m, 1e9));
	tod[0][s] = 0;
	priority_queue< pair<int, ii> > pq;
	pq.push(make_pair(0, ii(r1, s)));
	while(!pq.empty())
	{
		auto f = pq.top(); pq.pop();
		int d = -f.X, x = f.Y.X, y = f.Y.Y;
		if(d> tod[x-r1][y]) continue;
		if(y && H[x][y-1]+d< tod[x-r1][y-1])
		{
			tod[x-r1][y-1] = H[x][y-1]+d;
			pq.push(make_pair(-tod[x-r1][y-1], ii(x, y-1)));
		}
		if(y+1< m && H[x][y]+d< tod[x-r1][y+1])
		{
			tod[x-r1][y+1] = H[x][y]+d;
			pq.push(make_pair(-tod[x-r1][y+1], ii(x, y+1)));
		}
		if(x+1<= r2 && V[x][y]+d< tod[x+1-r1][y])
		{
			tod[x+1-r1][y] = V[x][y]+d;
			pq.push(make_pair(-tod[x+1-r1][y], ii(x+1, y)));
		}
	}
	dist = tod.back();
}

void merge(vector< vector<int> > &dist, vector< vector<int> > &d1, vector< vector<int> > &d2)
{
	// printf("begun merging\n");
	vector< vector<int> > opt(m, vector<int>(m, 0));
	for(int diff = -m+1; diff<= m-1; diff++)
	{
		for(int i = 0; i< m; i++)
		{
			int j = i+diff;
			if(j< 0 || j>= m) continue;
			// printf("begun %d %d\n", i, j);
			dist[i][j] = 1e9;
			if(diff == -m+1)
			{
				for(int k = 0; k< m; k++)
				{
					if(d1[i][k]+d2[k][j]< dist[i][j])
					{
						dist[i][j] = d1[i][k] + d2[k][j];
						opt[i][j] = k;
					}
				}
			}
			else
			{
				for(int k = max(0, j?opt[i][j-1]:0); k<= min(m-1, i+1< m?opt[i+1][j]:m-1); k++)
				{
					//printf("k = %d\n", k);
					if(d1[i][k]+d2[k][j]< dist[i][j])
					{
						dist[i][j] = d1[i][k] + d2[k][j];
						opt[i][j] = k;
					}
				}
			}
		}
	}
	// printf("finished merging\n");
}

void build(int p = 1, int L = 0, int R = n-1)
{
	// printf("%d %d %d\n", p, L, R);
	st[p] = node(true);
	if(R-L+1<= ub)
	{
		for(int i = 0; i< m; i++)
		{
			dijk(i, L, R, st[p].dist[i]);
		}
		// printf("finished creating\n");
		return;
	}
	build(2*p, L, (L+R)/2);
	build(2*p+1, (L+R)/2, R);
	merge(st[p].dist, st[2*p].dist, st[2*p+1].dist);
}

void update(int x, int p = 1, int L = 0, int R = n-1)
{
	if(R-L+1<= ub)
	{
		for(int i = 0; i< m; i++)
		{
			dijk(i, L, R, st[p].dist[i]);
		}
		return;
	}

	int M = (L+R)/2;
	if(x<= M) update(x, 2*p, L, (L+R)/2);
	if(M<= x) update(x, 2*p+1, (L+R)/2, R);
	merge(st[p].dist, st[2*p].dist, st[2*p+1].dist);
}

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+1< m; j++)
		{
			H[i][j] = h[i][j];
		}
	}
	for(int i = 0; i+1< n; i++)
	{
		for(int j = 0; j< m; j++)
		{
			V[i][j] = v[i][j];
		}
	}
	//printf("started initing\n");
	build();
}

void changeH(int P, int Q, int W)
{
	//printf("changingH\n");
	H[P][Q] = W;
	update(P);
}

void changeV(int P, int Q, int W)
{
	//printf("changingV\n");
	V[P][Q] = W;
	update(P);
}

int escape(int V1, int V2)
{
	return st[1].dist[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]
  int res;
      ^~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 8904 KB Output is correct
2 Correct 14 ms 9080 KB Output is correct
3 Correct 100 ms 11952 KB Output is correct
4 Correct 15 ms 11952 KB Output is correct
5 Correct 15 ms 11952 KB Output is correct
6 Correct 2 ms 11952 KB Output is correct
7 Correct 3 ms 11952 KB Output is correct
8 Correct 4 ms 11952 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 11952 KB Output is correct
2 Correct 3 ms 11952 KB Output is correct
3 Correct 3 ms 11952 KB Output is correct
4 Correct 5 ms 11952 KB Output is correct
5 Correct 4 ms 11952 KB Output is correct
6 Correct 6 ms 11952 KB Output is correct
7 Correct 5 ms 11952 KB Output is correct
8 Correct 6 ms 11952 KB Output is correct
9 Correct 5 ms 11952 KB Output is correct
10 Correct 5 ms 11952 KB Output is correct
11 Correct 94 ms 11952 KB Output is correct
12 Correct 7 ms 11952 KB Output is correct

Subtask #3
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 663 ms 11952 KB Output is correct
2 Correct 1177 ms 11952 KB Output is correct
3 Correct 665 ms 11952 KB Output is correct
4 Correct 616 ms 11952 KB Output is correct
5 Correct 592 ms 11952 KB Output is correct
6 Correct 2 ms 11952 KB Output is correct
7 Correct 2 ms 11952 KB Output is correct
8 Correct 3 ms 11952 KB Output is correct
9 Correct 5042 ms 11952 KB Output is correct
10 Correct 3 ms 11952 KB Output is correct

Subtask #4
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 27 ms 18952 KB Output is correct
2 Correct 21 ms 19004 KB Output is correct
3 Correct 22 ms 19004 KB Output is correct
4 Correct 69 ms 19796 KB Output is correct

Subtask #5
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 611 ms 19796 KB Output is correct
2 Correct 1123 ms 19796 KB Output is correct
3 Correct 626 ms 19796 KB Output is correct
4 Correct 587 ms 19796 KB Output is correct
5 Correct 671 ms 19796 KB Output is correct
6 Correct 25 ms 19796 KB Output is correct
7 Correct 27 ms 19796 KB Output is correct
8 Correct 31 ms 19796 KB Output is correct
9 Correct 93 ms 19848 KB Output is correct
10 Correct 11 ms 19848 KB Output is correct
11 Correct 14 ms 19848 KB Output is correct
12 Correct 96 ms 19848 KB Output is correct
13 Correct 13 ms 19848 KB Output is correct
14 Correct 14 ms 19848 KB Output is correct
15 Correct 3 ms 19848 KB Output is correct
16 Correct 3 ms 19848 KB Output is correct
17 Correct 3 ms 19848 KB Output is correct
18 Correct 4 ms 19848 KB Output is correct
19 Correct 5 ms 19848 KB Output is correct
20 Correct 4 ms 19848 KB Output is correct
21 Correct 5 ms 19848 KB Output is correct
22 Correct 4 ms 19848 KB Output is correct
23 Correct 5 ms 19848 KB Output is correct
24 Correct 4 ms 19848 KB Output is correct
25 Correct 97 ms 19848 KB Output is correct
26 Correct 5 ms 19848 KB Output is correct
27 Correct 4986 ms 19848 KB Output is correct
28 Correct 16385 ms 195452 KB Output is correct
29 Correct 7701 ms 196076 KB Output is correct
30 Correct 7282 ms 199732 KB Output is correct
31 Correct 19898 ms 208128 KB Output is correct
32 Correct 4 ms 208128 KB Output is correct

Subtask #6
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 586 ms 208128 KB Output is correct
2 Correct 1137 ms 208128 KB Output is correct
3 Correct 594 ms 208128 KB Output is correct
4 Correct 568 ms 208128 KB Output is correct
5 Correct 612 ms 208128 KB Output is correct
6 Correct 25 ms 208128 KB Output is correct
7 Correct 22 ms 208128 KB Output is correct
8 Correct 22 ms 208128 KB Output is correct
9 Correct 59 ms 208128 KB Output is correct
10 Correct 15 ms 208128 KB Output is correct
11 Correct 12 ms 208128 KB Output is correct
12 Correct 107 ms 208128 KB Output is correct
13 Correct 15 ms 208128 KB Output is correct
14 Correct 12 ms 208128 KB Output is correct
15 Runtime error 9137 ms 263168 KB Execution killed with signal 9 (could be triggered by violating memory limits)
16 Halted 0 ms 0 KB -