#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
const ll MAXN = 3e4 + 5;
ll n, m, ans = -1, awal, tujuan;
vector<ll> baris[MAXN];
// bool visited[MAXN][MAXN];
map<pll, bool> visited;
void bfs() {
queue<pair<pll, ll>> que;
// {{Idx Baris, Lompat}, Dist}
for (int i = 0; i < baris[awal].size(); ++i)
{
que.push({{awal, baris[awal][i]}, 0});
}
while(!que.empty()) {
pair<pll, ll> now = que.front();
// {{Idx Baris, Lompat}, Dist}
que.pop();
if (visited[now.first])
{
continue ;
}
visited[now.first] = true;
if (now.first.first == tujuan)
{
ans = now.second;
return ;
}
ll lompat = now.first.second;
ll nxt = now.first.first + lompat;
if (nxt < n && !visited[{nxt, lompat}])
{
que.push({{nxt, lompat}, now.second+1});
}
nxt = now.first.first - lompat;
if (nxt >= 0 && !visited[{nxt, lompat}])
{
que.push({{nxt, lompat}, now.second+1});
}
vector<ll> barisNow = baris[now.first.first];
for (int i = 0; i < barisNow.size(); ++i)
{
lompat = barisNow[i];
nxt = now.first.first + lompat;
if (nxt < n && !visited[{nxt, lompat}])
{
que.push({{nxt, lompat}, now.second+1});
}
nxt = now.first.first - lompat;
if (nxt >= 0 && !visited[{nxt, lompat}])
{
que.push({{nxt, lompat}, now.second+1});
}
}
}
}
int main(){
cin >> n >> m;
for (int i = 0; i < m; ++i)
{
ll tmpa, tmpb;
cin >> tmpa >> tmpb;
baris[tmpa].push_back(tmpb);
if (i == 0) {
awal = tmpa;
} else if (i == 1) {
tujuan = tmpa;
}
}
bfs();
cout << ans << "\n";
return 0;
}
Compilation message
skyscraper.cpp: In function 'void bfs()':
skyscraper.cpp:17:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
17 | for (int i = 0; i < baris[awal].size(); ++i)
| ~~^~~~~~~~~~~~~~~~~~~~
skyscraper.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
54 | for (int i = 0; i < barisNow.size(); ++i)
| ~~^~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
980 KB |
Output is correct |
10 |
Correct |
1 ms |
980 KB |
Output is correct |
11 |
Correct |
1 ms |
980 KB |
Output is correct |
12 |
Correct |
1 ms |
980 KB |
Output is correct |
13 |
Correct |
1 ms |
980 KB |
Output is correct |
14 |
Correct |
9 ms |
1632 KB |
Output is correct |
15 |
Correct |
2 ms |
1236 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
980 KB |
Output is correct |
10 |
Correct |
1 ms |
980 KB |
Output is correct |
11 |
Correct |
1 ms |
980 KB |
Output is correct |
12 |
Correct |
1 ms |
980 KB |
Output is correct |
13 |
Correct |
1 ms |
980 KB |
Output is correct |
14 |
Correct |
9 ms |
1620 KB |
Output is correct |
15 |
Correct |
3 ms |
1236 KB |
Output is correct |
16 |
Correct |
1 ms |
980 KB |
Output is correct |
17 |
Correct |
3 ms |
1364 KB |
Output is correct |
18 |
Correct |
1 ms |
980 KB |
Output is correct |
19 |
Correct |
1 ms |
980 KB |
Output is correct |
20 |
Correct |
2 ms |
1108 KB |
Output is correct |
21 |
Correct |
1 ms |
980 KB |
Output is correct |
22 |
Correct |
1 ms |
980 KB |
Output is correct |
23 |
Correct |
3 ms |
1236 KB |
Output is correct |
24 |
Correct |
5 ms |
1364 KB |
Output is correct |
25 |
Correct |
2 ms |
980 KB |
Output is correct |
26 |
Correct |
2 ms |
1108 KB |
Output is correct |
27 |
Correct |
3 ms |
1236 KB |
Output is correct |
28 |
Correct |
11 ms |
2132 KB |
Output is correct |
29 |
Correct |
41 ms |
4700 KB |
Output is correct |
30 |
Correct |
9 ms |
2004 KB |
Output is correct |
31 |
Correct |
16 ms |
3008 KB |
Output is correct |
32 |
Correct |
11 ms |
2420 KB |
Output is correct |
33 |
Correct |
85 ms |
8524 KB |
Output is correct |
34 |
Correct |
45 ms |
5036 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
980 KB |
Output is correct |
10 |
Correct |
1 ms |
980 KB |
Output is correct |
11 |
Correct |
1 ms |
980 KB |
Output is correct |
12 |
Correct |
1 ms |
980 KB |
Output is correct |
13 |
Correct |
1 ms |
980 KB |
Output is correct |
14 |
Correct |
9 ms |
1620 KB |
Output is correct |
15 |
Correct |
2 ms |
1236 KB |
Output is correct |
16 |
Correct |
1 ms |
980 KB |
Output is correct |
17 |
Correct |
3 ms |
1364 KB |
Output is correct |
18 |
Correct |
1 ms |
980 KB |
Output is correct |
19 |
Correct |
1 ms |
980 KB |
Output is correct |
20 |
Correct |
2 ms |
1108 KB |
Output is correct |
21 |
Correct |
1 ms |
980 KB |
Output is correct |
22 |
Correct |
1 ms |
980 KB |
Output is correct |
23 |
Correct |
4 ms |
1220 KB |
Output is correct |
24 |
Correct |
5 ms |
1364 KB |
Output is correct |
25 |
Correct |
2 ms |
980 KB |
Output is correct |
26 |
Correct |
2 ms |
1108 KB |
Output is correct |
27 |
Correct |
3 ms |
1236 KB |
Output is correct |
28 |
Correct |
11 ms |
2184 KB |
Output is correct |
29 |
Correct |
41 ms |
4940 KB |
Output is correct |
30 |
Correct |
8 ms |
2004 KB |
Output is correct |
31 |
Correct |
16 ms |
3028 KB |
Output is correct |
32 |
Correct |
12 ms |
2480 KB |
Output is correct |
33 |
Correct |
87 ms |
8484 KB |
Output is correct |
34 |
Correct |
44 ms |
5024 KB |
Output is correct |
35 |
Correct |
37 ms |
5308 KB |
Output is correct |
36 |
Correct |
3 ms |
1108 KB |
Output is correct |
37 |
Correct |
13 ms |
2984 KB |
Output is correct |
38 |
Correct |
25 ms |
4280 KB |
Output is correct |
39 |
Correct |
11 ms |
1364 KB |
Output is correct |
40 |
Correct |
11 ms |
1436 KB |
Output is correct |
41 |
Correct |
12 ms |
1828 KB |
Output is correct |
42 |
Correct |
12 ms |
1364 KB |
Output is correct |
43 |
Correct |
11 ms |
1488 KB |
Output is correct |
44 |
Correct |
12 ms |
2256 KB |
Output is correct |
45 |
Execution timed out |
1095 ms |
31068 KB |
Time limit exceeded |
46 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
1024 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
980 KB |
Output is correct |
10 |
Correct |
1 ms |
980 KB |
Output is correct |
11 |
Correct |
3 ms |
980 KB |
Output is correct |
12 |
Correct |
1 ms |
980 KB |
Output is correct |
13 |
Correct |
1 ms |
980 KB |
Output is correct |
14 |
Correct |
8 ms |
1620 KB |
Output is correct |
15 |
Correct |
2 ms |
1236 KB |
Output is correct |
16 |
Correct |
1 ms |
980 KB |
Output is correct |
17 |
Correct |
3 ms |
1364 KB |
Output is correct |
18 |
Correct |
1 ms |
980 KB |
Output is correct |
19 |
Correct |
1 ms |
980 KB |
Output is correct |
20 |
Correct |
2 ms |
1108 KB |
Output is correct |
21 |
Correct |
1 ms |
980 KB |
Output is correct |
22 |
Correct |
1 ms |
980 KB |
Output is correct |
23 |
Correct |
3 ms |
1260 KB |
Output is correct |
24 |
Correct |
5 ms |
1440 KB |
Output is correct |
25 |
Correct |
2 ms |
980 KB |
Output is correct |
26 |
Correct |
2 ms |
1108 KB |
Output is correct |
27 |
Correct |
3 ms |
1236 KB |
Output is correct |
28 |
Correct |
13 ms |
2132 KB |
Output is correct |
29 |
Correct |
35 ms |
4748 KB |
Output is correct |
30 |
Correct |
8 ms |
2004 KB |
Output is correct |
31 |
Correct |
16 ms |
2972 KB |
Output is correct |
32 |
Correct |
11 ms |
2388 KB |
Output is correct |
33 |
Correct |
98 ms |
8632 KB |
Output is correct |
34 |
Correct |
53 ms |
5012 KB |
Output is correct |
35 |
Correct |
37 ms |
5240 KB |
Output is correct |
36 |
Correct |
3 ms |
1108 KB |
Output is correct |
37 |
Correct |
14 ms |
3028 KB |
Output is correct |
38 |
Correct |
25 ms |
4168 KB |
Output is correct |
39 |
Correct |
11 ms |
1364 KB |
Output is correct |
40 |
Correct |
11 ms |
1472 KB |
Output is correct |
41 |
Correct |
12 ms |
1748 KB |
Output is correct |
42 |
Correct |
10 ms |
1364 KB |
Output is correct |
43 |
Correct |
11 ms |
1500 KB |
Output is correct |
44 |
Correct |
12 ms |
2320 KB |
Output is correct |
45 |
Execution timed out |
1083 ms |
29340 KB |
Time limit exceeded |
46 |
Halted |
0 ms |
0 KB |
- |