#include <bits/stdc++.h>
using namespace std;
#define SZ(v) ((int)(v).size())
using ll = long long;
const int MAX = 2000;
map<pair<int, int>, int> dis;
set<pair<int, int>> seen;
vector<int> types[MAX];
struct Etat
{
int pos, last_type;
int get() const
{
return dis[{pos, last_type}];
}
};
int main(void)
{
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
int nb_doge, len_route;
cin >> len_route >> nb_doge;
vector<pair<int, int> > doge(nb_doge);
for (auto &[building, skip] : doge)
{
cin >> building >> skip;
types[building].push_back(skip);
}
int target = doge[1].first;
queue<Etat> pq;
dis[{doge[0].first, doge[0].second}] = 0;
pq.push({doge[0].first, doge[0].second});
while (SZ(pq))
{
Etat cur = pq.front(); pq.pop();
auto [pos, last_type] = cur;
if (seen.count({pos, last_type})) continue;
seen.insert({pos, last_type});
if (pos == target)
{
cout << cur.get() << endl;
return 0;
}
types[pos].push_back(last_type);
for (auto type : types[pos])
{
if (pos >= type and !dis.count({pos-type, type}))
{
dis[{pos - type, type}] = 1 + cur.get();
pq.push({pos - type, type});
}
if (pos + type < len_route and !dis.count({pos+type, type}))
{
dis[{pos+type, type}] = 1 + cur.get();
pq.push({pos+type, type});
}
}
types[pos].pop_back();
}
cout << -1 << endl;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
5 ms |
384 KB |
Output is correct |
3 |
Correct |
4 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
5 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
4 ms |
384 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
4 ms |
384 KB |
Output is correct |
3 |
Correct |
4 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
5 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
4 ms |
384 KB |
Output is correct |
8 |
Correct |
5 ms |
384 KB |
Output is correct |
9 |
Correct |
4 ms |
384 KB |
Output is correct |
10 |
Correct |
5 ms |
384 KB |
Output is correct |
11 |
Correct |
5 ms |
384 KB |
Output is correct |
12 |
Correct |
5 ms |
384 KB |
Output is correct |
13 |
Correct |
5 ms |
384 KB |
Output is correct |
14 |
Correct |
16 ms |
1024 KB |
Output is correct |
15 |
Correct |
6 ms |
512 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
5 ms |
384 KB |
Output is correct |
3 |
Correct |
4 ms |
384 KB |
Output is correct |
4 |
Correct |
4 ms |
384 KB |
Output is correct |
5 |
Correct |
4 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
5 ms |
384 KB |
Output is correct |
8 |
Correct |
5 ms |
384 KB |
Output is correct |
9 |
Correct |
5 ms |
384 KB |
Output is correct |
10 |
Correct |
5 ms |
384 KB |
Output is correct |
11 |
Correct |
5 ms |
384 KB |
Output is correct |
12 |
Correct |
5 ms |
384 KB |
Output is correct |
13 |
Correct |
5 ms |
384 KB |
Output is correct |
14 |
Correct |
16 ms |
1024 KB |
Output is correct |
15 |
Correct |
6 ms |
512 KB |
Output is correct |
16 |
Correct |
5 ms |
384 KB |
Output is correct |
17 |
Correct |
8 ms |
768 KB |
Output is correct |
18 |
Correct |
5 ms |
384 KB |
Output is correct |
19 |
Correct |
5 ms |
384 KB |
Output is correct |
20 |
Correct |
6 ms |
640 KB |
Output is correct |
21 |
Correct |
5 ms |
384 KB |
Output is correct |
22 |
Correct |
5 ms |
384 KB |
Output is correct |
23 |
Correct |
9 ms |
896 KB |
Output is correct |
24 |
Correct |
12 ms |
1024 KB |
Output is correct |
25 |
Correct |
5 ms |
512 KB |
Output is correct |
26 |
Correct |
7 ms |
768 KB |
Output is correct |
27 |
Correct |
8 ms |
896 KB |
Output is correct |
28 |
Correct |
26 ms |
2560 KB |
Output is correct |
29 |
Correct |
111 ms |
7160 KB |
Output is correct |
30 |
Correct |
21 ms |
2304 KB |
Output is correct |
31 |
Correct |
41 ms |
4096 KB |
Output is correct |
32 |
Correct |
29 ms |
3064 KB |
Output is correct |
33 |
Correct |
246 ms |
13560 KB |
Output is correct |
34 |
Correct |
112 ms |
7416 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
4 ms |
384 KB |
Output is correct |
3 |
Correct |
4 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
4 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
5 ms |
384 KB |
Output is correct |
8 |
Correct |
5 ms |
384 KB |
Output is correct |
9 |
Correct |
5 ms |
384 KB |
Output is correct |
10 |
Correct |
5 ms |
384 KB |
Output is correct |
11 |
Correct |
5 ms |
384 KB |
Output is correct |
12 |
Correct |
5 ms |
384 KB |
Output is correct |
13 |
Correct |
5 ms |
384 KB |
Output is correct |
14 |
Correct |
16 ms |
1024 KB |
Output is correct |
15 |
Correct |
6 ms |
512 KB |
Output is correct |
16 |
Correct |
5 ms |
384 KB |
Output is correct |
17 |
Correct |
8 ms |
768 KB |
Output is correct |
18 |
Correct |
5 ms |
384 KB |
Output is correct |
19 |
Correct |
5 ms |
384 KB |
Output is correct |
20 |
Correct |
6 ms |
768 KB |
Output is correct |
21 |
Correct |
5 ms |
384 KB |
Output is correct |
22 |
Correct |
5 ms |
384 KB |
Output is correct |
23 |
Correct |
9 ms |
896 KB |
Output is correct |
24 |
Correct |
12 ms |
1024 KB |
Output is correct |
25 |
Correct |
6 ms |
512 KB |
Output is correct |
26 |
Correct |
7 ms |
768 KB |
Output is correct |
27 |
Correct |
8 ms |
896 KB |
Output is correct |
28 |
Correct |
25 ms |
2560 KB |
Output is correct |
29 |
Correct |
93 ms |
7160 KB |
Output is correct |
30 |
Correct |
22 ms |
2304 KB |
Output is correct |
31 |
Correct |
45 ms |
4088 KB |
Output is correct |
32 |
Correct |
30 ms |
3072 KB |
Output is correct |
33 |
Correct |
274 ms |
13560 KB |
Output is correct |
34 |
Correct |
117 ms |
7416 KB |
Output is correct |
35 |
Correct |
62 ms |
3320 KB |
Output is correct |
36 |
Correct |
6 ms |
512 KB |
Output is correct |
37 |
Correct |
22 ms |
2176 KB |
Output is correct |
38 |
Correct |
33 ms |
2936 KB |
Output is correct |
39 |
Correct |
11 ms |
896 KB |
Output is correct |
40 |
Correct |
11 ms |
896 KB |
Output is correct |
41 |
Correct |
13 ms |
1152 KB |
Output is correct |
42 |
Correct |
11 ms |
1152 KB |
Output is correct |
43 |
Correct |
13 ms |
1280 KB |
Output is correct |
44 |
Correct |
11 ms |
1024 KB |
Output is correct |
45 |
Execution timed out |
1093 ms |
18808 KB |
Time limit exceeded |
46 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
5 ms |
512 KB |
Output is correct |
3 |
Correct |
5 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
5 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
5 ms |
384 KB |
Output is correct |
8 |
Correct |
5 ms |
384 KB |
Output is correct |
9 |
Correct |
5 ms |
384 KB |
Output is correct |
10 |
Correct |
5 ms |
384 KB |
Output is correct |
11 |
Correct |
5 ms |
384 KB |
Output is correct |
12 |
Correct |
5 ms |
384 KB |
Output is correct |
13 |
Correct |
5 ms |
384 KB |
Output is correct |
14 |
Correct |
16 ms |
1024 KB |
Output is correct |
15 |
Correct |
6 ms |
640 KB |
Output is correct |
16 |
Correct |
5 ms |
384 KB |
Output is correct |
17 |
Correct |
8 ms |
768 KB |
Output is correct |
18 |
Correct |
5 ms |
384 KB |
Output is correct |
19 |
Correct |
5 ms |
384 KB |
Output is correct |
20 |
Correct |
6 ms |
640 KB |
Output is correct |
21 |
Correct |
5 ms |
384 KB |
Output is correct |
22 |
Correct |
5 ms |
384 KB |
Output is correct |
23 |
Correct |
10 ms |
896 KB |
Output is correct |
24 |
Correct |
12 ms |
1024 KB |
Output is correct |
25 |
Correct |
5 ms |
512 KB |
Output is correct |
26 |
Correct |
7 ms |
768 KB |
Output is correct |
27 |
Correct |
8 ms |
896 KB |
Output is correct |
28 |
Correct |
24 ms |
2560 KB |
Output is correct |
29 |
Correct |
95 ms |
7160 KB |
Output is correct |
30 |
Correct |
21 ms |
2304 KB |
Output is correct |
31 |
Correct |
43 ms |
4088 KB |
Output is correct |
32 |
Correct |
30 ms |
3028 KB |
Output is correct |
33 |
Correct |
288 ms |
13560 KB |
Output is correct |
34 |
Correct |
110 ms |
7416 KB |
Output is correct |
35 |
Correct |
55 ms |
3192 KB |
Output is correct |
36 |
Correct |
6 ms |
512 KB |
Output is correct |
37 |
Correct |
23 ms |
2176 KB |
Output is correct |
38 |
Correct |
35 ms |
3064 KB |
Output is correct |
39 |
Correct |
11 ms |
896 KB |
Output is correct |
40 |
Correct |
12 ms |
896 KB |
Output is correct |
41 |
Correct |
14 ms |
1152 KB |
Output is correct |
42 |
Correct |
11 ms |
1152 KB |
Output is correct |
43 |
Correct |
12 ms |
1280 KB |
Output is correct |
44 |
Correct |
12 ms |
1024 KB |
Output is correct |
45 |
Execution timed out |
1096 ms |
19192 KB |
Time limit exceeded |
46 |
Halted |
0 ms |
0 KB |
- |