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답안 #143928

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
143928 2019-08-15T13:09:46 Z WhipppedCream Jakarta Skyscrapers (APIO15_skyscraper) C++17
100 / 100
 810 ms 74548 KB 
#include <bits/stdc++.h>
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
using namespace std;
#define X first
#define Y second
#define pb push_back
typedef pair<int, int> ii;
typedef long long ll;
 
const int maxn = 3e4+5;
const int half = 173;
 
int n, m;
int dist[maxn*180*2];

vector< ii > adj[maxn];
 
bool ok(int x)
{
	return 0<= x && x< n;
}

int N;

priority_queue< pair<int, int> > q;

int conv(int u, int md, int isleft)
{
	if(isleft) return (half+1)*n+(md-1)*n+u;
	return md*n+u;
}

void bfs(int s)
{
	for(int i = 0; i< N; i++) dist[i] = 1e9;
	dist[s] = 0; q.push({0, s});
	while(!q.empty())
	{
		auto kk = q.top(); q.pop();
		int u = kk.Y, d = -kk.X;
		// printf("%d\n", u);
		if(d> dist[u]) continue;
		if(u< n)
		{
			for(auto k2 : adj[u])
			{
				int v = k2.X, w = k2.Y;
				if(dist[v]> dist[u]+w)
				{
					dist[v] = dist[u]+w;
					q.push({-dist[v], v});
				}
			}
		}
		if(u>= n)
		{
			bool isleft = false;
			int tmp;
			if(u< (half+1)*n)
			{		
				isleft = false;
				tmp = u-n;
			}
			else
			{
				isleft = true;
				tmp = u-(half+1)*n;
			}
			int md = tmp/n+1;
			int sub = tmp%n;
			// assert(conv(sub, md, isleft) == u);
			if(isleft && ok(sub-md))
			{
				int nxt = conv(sub-md, md, isleft);
				if(dist[nxt]> dist[u]+1)
				{
					dist[nxt] = dist[u]+1;
					q.push({-dist[nxt], nxt});
				}
				if(dist[sub-md]> dist[u]+1)
				{
					dist[sub-md] = dist[u]+1;
					q.push({-dist[sub-md], sub-md});
				}
			}
			if(!isleft && ok(sub+md))
			{
				int nxt = conv(sub+md, md, isleft);
				if(dist[nxt]> dist[u]+1)
				{
					dist[nxt] = dist[u]+1;
					q.push({-dist[nxt], nxt});
				}
				if(dist[sub+md]> dist[u]+1)
				{
					dist[sub+md] = dist[u]+1;
					q.push({-dist[sub+md], sub+md});
				}
			}
		}
	}
}
 
int hom[maxn], mana[maxn];
 
int main()
{
	scanf("%d %d", &n, &m);
	N = conv(n-1, half, 1);
	for(int i = 0; i< m; i++)
	{
		scanf("%d %d", &hom[i], &mana[i]);
	}
	// printf("okay\n");
	for(int i = 0; i< m; i++)
	{
		int pw = mana[i];
		if(pw> half)
		{
			int cur = hom[i]+pw;
			while(cur< n)
			{
				adj[hom[i]].pb({cur, abs(cur-hom[i])/pw});
				cur += pw;
			}
			cur = hom[i]-pw;
			while(cur>= 0)
			{
				adj[hom[i]].pb({cur, abs(cur-hom[i])/pw});
				cur -= pw;
			}
		}
		else
		{
			int x = hom[i];
			adj[x].pb({conv(x, pw, 0), 0});
			adj[x].pb({conv(x, pw, 1), 0});
		}
	}
	bfs(hom[0]);
	if(dist[hom[1]] == 1e9) printf("-1\n");
	else printf("%d\n", dist[hom[1]]);
}

Compilation message

skyscraper.cpp: In function 'int main()':
skyscraper.cpp:109:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~~
skyscraper.cpp:113:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &hom[i], &mana[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1076 KB Output is correct
2 Correct 3 ms 1080 KB Output is correct
3 Correct 3 ms 1016 KB Output is correct
4 Correct 3 ms 1016 KB Output is correct
5 Correct 3 ms 1016 KB Output is correct
6 Correct 3 ms 1016 KB Output is correct
7 Correct 3 ms 1016 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1080 KB Output is correct
2 Correct 3 ms 1012 KB Output is correct
3 Correct 2 ms 1016 KB Output is correct
4 Correct 3 ms 1060 KB Output is correct
5 Correct 3 ms 1016 KB Output is correct
6 Correct 3 ms 1016 KB Output is correct
7 Correct 3 ms 1016 KB Output is correct
8 Correct 3 ms 1076 KB Output is correct
9 Correct 3 ms 1144 KB Output is correct
10 Correct 3 ms 1144 KB Output is correct
11 Correct 4 ms 1272 KB Output is correct
12 Correct 2 ms 1272 KB Output is correct
13 Correct 3 ms 1272 KB Output is correct
14 Correct 4 ms 1272 KB Output is correct
15 Correct 4 ms 1272 KB Output is correct

Subtask #3
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1088 KB Output is correct
2 Correct 3 ms 1016 KB Output is correct
3 Correct 3 ms 988 KB Output is correct
4 Correct 3 ms 1016 KB Output is correct
5 Correct 3 ms 1144 KB Output is correct
6 Correct 3 ms 1088 KB Output is correct
7 Correct 3 ms 1016 KB Output is correct
8 Correct 3 ms 1144 KB Output is correct
9 Correct 3 ms 1144 KB Output is correct
10 Correct 3 ms 1208 KB Output is correct
11 Correct 5 ms 1272 KB Output is correct
12 Correct 3 ms 1244 KB Output is correct
13 Correct 3 ms 1272 KB Output is correct
14 Correct 4 ms 1320 KB Output is correct
15 Correct 4 ms 1272 KB Output is correct
16 Correct 3 ms 1400 KB Output is correct
17 Correct 6 ms 2168 KB Output is correct
18 Correct 5 ms 3388 KB Output is correct
19 Correct 5 ms 3708 KB Output is correct
20 Correct 6 ms 3832 KB Output is correct
21 Correct 3 ms 1528 KB Output is correct
22 Correct 5 ms 3448 KB Output is correct
23 Correct 5 ms 3292 KB Output is correct
24 Correct 7 ms 3708 KB Output is correct
25 Correct 6 ms 3832 KB Output is correct
26 Correct 6 ms 3816 KB Output is correct
27 Correct 6 ms 3832 KB Output is correct
28 Correct 6 ms 3832 KB Output is correct
29 Correct 11 ms 3832 KB Output is correct
30 Correct 7 ms 3704 KB Output is correct
31 Correct 9 ms 3832 KB Output is correct
32 Correct 8 ms 3804 KB Output is correct
33 Correct 18 ms 3832 KB Output is correct
34 Correct 18 ms 3832 KB Output is correct

Subtask #4
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1060 KB Output is correct
2 Correct 3 ms 1016 KB Output is correct
3 Correct 3 ms 1016 KB Output is correct
4 Correct 3 ms 1016 KB Output is correct
5 Correct 3 ms 1092 KB Output is correct
6 Correct 3 ms 1016 KB Output is correct
7 Correct 3 ms 1020 KB Output is correct
8 Correct 3 ms 1016 KB Output is correct
9 Correct 3 ms 1116 KB Output is correct
10 Correct 3 ms 1272 KB Output is correct
11 Correct 4 ms 1272 KB Output is correct
12 Correct 3 ms 1272 KB Output is correct
13 Correct 3 ms 1272 KB Output is correct
14 Correct 4 ms 1272 KB Output is correct
15 Correct 5 ms 1272 KB Output is correct
16 Correct 3 ms 1272 KB Output is correct
17 Correct 6 ms 2168 KB Output is correct
18 Correct 5 ms 3448 KB Output is correct
19 Correct 5 ms 3832 KB Output is correct
20 Correct 7 ms 3832 KB Output is correct
21 Correct 4 ms 1528 KB Output is correct
22 Correct 5 ms 3448 KB Output is correct
23 Correct 5 ms 3192 KB Output is correct
24 Correct 7 ms 3704 KB Output is correct
25 Correct 6 ms 3832 KB Output is correct
26 Correct 6 ms 3832 KB Output is correct
27 Correct 6 ms 3836 KB Output is correct
28 Correct 6 ms 3832 KB Output is correct
29 Correct 11 ms 3832 KB Output is correct
30 Correct 7 ms 3704 KB Output is correct
31 Correct 8 ms 3832 KB Output is correct
32 Correct 8 ms 3772 KB Output is correct
33 Correct 18 ms 3924 KB Output is correct
34 Correct 41 ms 3832 KB Output is correct
35 Correct 20 ms 3820 KB Output is correct
36 Correct 6 ms 2680 KB Output is correct
37 Correct 28 ms 4920 KB Output is correct
38 Correct 27 ms 4984 KB Output is correct
39 Correct 29 ms 4968 KB Output is correct
40 Correct 28 ms 5092 KB Output is correct
41 Correct 27 ms 4988 KB Output is correct
42 Correct 12 ms 4848 KB Output is correct
43 Correct 12 ms 4720 KB Output is correct
44 Correct 7 ms 4804 KB Output is correct
45 Correct 61 ms 6236 KB Output is correct
46 Correct 61 ms 6376 KB Output is correct

Subtask #5
43.0 / 43.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 1120 KB Output is correct
2 Correct 3 ms 1016 KB Output is correct
3 Correct 3 ms 1064 KB Output is correct
4 Correct 3 ms 1016 KB Output is correct
5 Correct 3 ms 1016 KB Output is correct
6 Correct 3 ms 1016 KB Output is correct
7 Correct 3 ms 1016 KB Output is correct
8 Correct 3 ms 1144 KB Output is correct
9 Correct 3 ms 1144 KB Output is correct
10 Correct 3 ms 1208 KB Output is correct
11 Correct 4 ms 1272 KB Output is correct
12 Correct 3 ms 1272 KB Output is correct
13 Correct 3 ms 1272 KB Output is correct
14 Correct 4 ms 1300 KB Output is correct
15 Correct 4 ms 1216 KB Output is correct
16 Correct 3 ms 1272 KB Output is correct
17 Correct 6 ms 2168 KB Output is correct
18 Correct 5 ms 3448 KB Output is correct
19 Correct 5 ms 3832 KB Output is correct
20 Correct 6 ms 3832 KB Output is correct
21 Correct 3 ms 1528 KB Output is correct
22 Correct 5 ms 3448 KB Output is correct
23 Correct 5 ms 3192 KB Output is correct
24 Correct 7 ms 3704 KB Output is correct
25 Correct 6 ms 3804 KB Output is correct
26 Correct 6 ms 3948 KB Output is correct
27 Correct 6 ms 3892 KB Output is correct
28 Correct 6 ms 3832 KB Output is correct
29 Correct 11 ms 3832 KB Output is correct
30 Correct 6 ms 3704 KB Output is correct
31 Correct 9 ms 3832 KB Output is correct
32 Correct 8 ms 3832 KB Output is correct
33 Correct 19 ms 3832 KB Output is correct
34 Correct 18 ms 3832 KB Output is correct
35 Correct 20 ms 3832 KB Output is correct
36 Correct 7 ms 2680 KB Output is correct
37 Correct 28 ms 4868 KB Output is correct
38 Correct 28 ms 4984 KB Output is correct
39 Correct 29 ms 4984 KB Output is correct
40 Correct 28 ms 5084 KB Output is correct
41 Correct 28 ms 4984 KB Output is correct
42 Correct 12 ms 4720 KB Output is correct
43 Correct 12 ms 4800 KB Output is correct
44 Correct 12 ms 4720 KB Output is correct
45 Correct 61 ms 6264 KB Output is correct
46 Correct 61 ms 6328 KB Output is correct
47 Correct 117 ms 22392 KB Output is correct
48 Correct 39 ms 34040 KB Output is correct
49 Correct 41 ms 36896 KB Output is correct
50 Correct 41 ms 40028 KB Output is correct
51 Correct 84 ms 44380 KB Output is correct
52 Correct 90 ms 44372 KB Output is correct
53 Correct 51 ms 42508 KB Output is correct
54 Correct 36 ms 41792 KB Output is correct
55 Correct 36 ms 41780 KB Output is correct
56 Correct 49 ms 43208 KB Output is correct
57 Correct 127 ms 41964 KB Output is correct
58 Correct 45 ms 42732 KB Output is correct
59 Correct 48 ms 42804 KB Output is correct
60 Correct 54 ms 43120 KB Output is correct
61 Correct 51 ms 43064 KB Output is correct
62 Correct 67 ms 44704 KB Output is correct
63 Correct 121 ms 66028 KB Output is correct
64 Correct 132 ms 74548 KB Output is correct
65 Correct 294 ms 72856 KB Output is correct
66 Correct 801 ms 67632 KB Output is correct
67 Correct 810 ms 67184 KB Output is correct