/*
Code written by Talant I.D.
*/
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;
#define precision(n) fixed << setprecision(n)
#define pb push_back
#define ub upper_bound
#define lb lower_bound
#define mp make_pair
#define eps (double)1e-9
#define PI 2*acos(0.0)
#define endl "\n"
#define sz(v) int((v).size())
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define do_not_disturb ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define OK cout << "OK" << endl;
const int mod = 998244353;
ll mode(ll a) {
a %= mod;
if (a < 0) a += mod;
return a;
}
ll subt(ll a, ll b) {
return mode(mode(a)-mode(b));
}
ll add(ll a, ll b) {
return mode(mode(a)+mode(b));
}
ll mult(ll a, ll b) {
return mode(mode(a)*mode(b));
}
ll binpow(ll a, ll b) {
ll res = 1;
while (b) {
if (b&1) res = mult(res, a);
a = mult(a, a);
b >>= 1;
}
return res;
}
const int N = 3e4+7;
bitset <N> used, vis[N];
vector <int> powers[N];
int main() {
do_not_disturb
int n, m;
cin >> n >> m;
int b[m], p[m];
for (int i = 0; i < m; i++) {
cin >> b[i] >> p[i];
powers[b[i]].pb(p[i]);
}
deque <array<int, 3>> K;
K.pb({b[0], p[0], 0});
while (!K.empty()) {
auto v = K.front(); K.pop_front();
vis[v[0]][v[1]] = 1;
if (v[0] == b[1]) {
cout << v[2] << endl;
return 0;
}
if (!used[v[0]]) {
for (auto to : powers[v[0]]) {
if (vis[v[0]][to]) continue;
vis[v[0]][to] = 1;
K.push_front({v[0], to, v[2]});
}
}
used[v[0]] = 1;
if (v[0]+v[1] < n && vis[v[0]+v[1]][v[1]] == 0) {
K.pb({v[0]+v[1], v[1], v[2]+1});
}
if (v[0]-v[1] >= 0 && vis[v[0]-v[1]][v[1]] == 0) {
K.pb({v[0]-v[1], v[1], v[2]+1});
}
}
cout << -1;
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
976 KB |
Output is correct |
2 |
Correct |
1 ms |
972 KB |
Output is correct |
3 |
Correct |
1 ms |
972 KB |
Output is correct |
4 |
Correct |
1 ms |
972 KB |
Output is correct |
5 |
Correct |
1 ms |
1028 KB |
Output is correct |
6 |
Correct |
1 ms |
972 KB |
Output is correct |
7 |
Correct |
1 ms |
972 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
972 KB |
Output is correct |
2 |
Correct |
1 ms |
1000 KB |
Output is correct |
3 |
Correct |
1 ms |
972 KB |
Output is correct |
4 |
Correct |
1 ms |
972 KB |
Output is correct |
5 |
Correct |
1 ms |
972 KB |
Output is correct |
6 |
Correct |
1 ms |
972 KB |
Output is correct |
7 |
Correct |
1 ms |
972 KB |
Output is correct |
8 |
Correct |
1 ms |
972 KB |
Output is correct |
9 |
Correct |
1 ms |
1032 KB |
Output is correct |
10 |
Correct |
1 ms |
1156 KB |
Output is correct |
11 |
Correct |
1 ms |
1072 KB |
Output is correct |
12 |
Correct |
1 ms |
1300 KB |
Output is correct |
13 |
Correct |
1 ms |
1356 KB |
Output is correct |
14 |
Correct |
2 ms |
1356 KB |
Output is correct |
15 |
Correct |
1 ms |
1356 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
972 KB |
Output is correct |
2 |
Correct |
1 ms |
972 KB |
Output is correct |
3 |
Correct |
1 ms |
972 KB |
Output is correct |
4 |
Correct |
1 ms |
972 KB |
Output is correct |
5 |
Correct |
1 ms |
1100 KB |
Output is correct |
6 |
Correct |
1 ms |
972 KB |
Output is correct |
7 |
Correct |
1 ms |
972 KB |
Output is correct |
8 |
Correct |
1 ms |
972 KB |
Output is correct |
9 |
Correct |
1 ms |
1032 KB |
Output is correct |
10 |
Correct |
1 ms |
1156 KB |
Output is correct |
11 |
Correct |
1 ms |
1100 KB |
Output is correct |
12 |
Correct |
2 ms |
1292 KB |
Output is correct |
13 |
Correct |
1 ms |
1356 KB |
Output is correct |
14 |
Correct |
2 ms |
1356 KB |
Output is correct |
15 |
Correct |
1 ms |
1356 KB |
Output is correct |
16 |
Correct |
1 ms |
1036 KB |
Output is correct |
17 |
Correct |
3 ms |
3404 KB |
Output is correct |
18 |
Correct |
1 ms |
972 KB |
Output is correct |
19 |
Correct |
1 ms |
1036 KB |
Output is correct |
20 |
Correct |
6 ms |
8396 KB |
Output is correct |
21 |
Correct |
1 ms |
972 KB |
Output is correct |
22 |
Correct |
1 ms |
972 KB |
Output is correct |
23 |
Correct |
5 ms |
6348 KB |
Output is correct |
24 |
Correct |
6 ms |
7500 KB |
Output is correct |
25 |
Correct |
2 ms |
2452 KB |
Output is correct |
26 |
Correct |
5 ms |
7372 KB |
Output is correct |
27 |
Correct |
6 ms |
7628 KB |
Output is correct |
28 |
Correct |
7 ms |
8472 KB |
Output is correct |
29 |
Correct |
7 ms |
8396 KB |
Output is correct |
30 |
Correct |
6 ms |
8268 KB |
Output is correct |
31 |
Correct |
6 ms |
8396 KB |
Output is correct |
32 |
Correct |
7 ms |
8268 KB |
Output is correct |
33 |
Correct |
10 ms |
8396 KB |
Output is correct |
34 |
Correct |
8 ms |
8396 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
972 KB |
Output is correct |
2 |
Correct |
1 ms |
972 KB |
Output is correct |
3 |
Correct |
1 ms |
972 KB |
Output is correct |
4 |
Correct |
1 ms |
1036 KB |
Output is correct |
5 |
Correct |
1 ms |
972 KB |
Output is correct |
6 |
Correct |
1 ms |
972 KB |
Output is correct |
7 |
Correct |
1 ms |
972 KB |
Output is correct |
8 |
Correct |
1 ms |
1032 KB |
Output is correct |
9 |
Correct |
1 ms |
1100 KB |
Output is correct |
10 |
Correct |
1 ms |
1100 KB |
Output is correct |
11 |
Correct |
1 ms |
1100 KB |
Output is correct |
12 |
Correct |
1 ms |
1296 KB |
Output is correct |
13 |
Correct |
2 ms |
1356 KB |
Output is correct |
14 |
Correct |
2 ms |
1356 KB |
Output is correct |
15 |
Correct |
1 ms |
1296 KB |
Output is correct |
16 |
Correct |
1 ms |
972 KB |
Output is correct |
17 |
Correct |
3 ms |
3356 KB |
Output is correct |
18 |
Correct |
1 ms |
972 KB |
Output is correct |
19 |
Correct |
1 ms |
1100 KB |
Output is correct |
20 |
Correct |
6 ms |
8344 KB |
Output is correct |
21 |
Correct |
1 ms |
972 KB |
Output is correct |
22 |
Correct |
1 ms |
972 KB |
Output is correct |
23 |
Correct |
6 ms |
6360 KB |
Output is correct |
24 |
Correct |
6 ms |
7512 KB |
Output is correct |
25 |
Correct |
2 ms |
2392 KB |
Output is correct |
26 |
Correct |
7 ms |
7384 KB |
Output is correct |
27 |
Correct |
6 ms |
7632 KB |
Output is correct |
28 |
Correct |
7 ms |
8408 KB |
Output is correct |
29 |
Correct |
8 ms |
8360 KB |
Output is correct |
30 |
Correct |
6 ms |
8268 KB |
Output is correct |
31 |
Correct |
7 ms |
8268 KB |
Output is correct |
32 |
Correct |
6 ms |
8268 KB |
Output is correct |
33 |
Correct |
9 ms |
8400 KB |
Output is correct |
34 |
Correct |
8 ms |
8396 KB |
Output is correct |
35 |
Correct |
12 ms |
7036 KB |
Output is correct |
36 |
Correct |
3 ms |
2196 KB |
Output is correct |
37 |
Correct |
9 ms |
6732 KB |
Output is correct |
38 |
Correct |
11 ms |
5016 KB |
Output is correct |
39 |
Correct |
8 ms |
1740 KB |
Output is correct |
40 |
Correct |
9 ms |
2764 KB |
Output is correct |
41 |
Correct |
9 ms |
3328 KB |
Output is correct |
42 |
Correct |
9 ms |
8012 KB |
Output is correct |
43 |
Correct |
10 ms |
8268 KB |
Output is correct |
44 |
Correct |
11 ms |
9036 KB |
Output is correct |
45 |
Correct |
24 ms |
9368 KB |
Output is correct |
46 |
Correct |
17 ms |
9224 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
972 KB |
Output is correct |
2 |
Correct |
1 ms |
972 KB |
Output is correct |
3 |
Correct |
1 ms |
1032 KB |
Output is correct |
4 |
Correct |
1 ms |
972 KB |
Output is correct |
5 |
Correct |
1 ms |
984 KB |
Output is correct |
6 |
Correct |
1 ms |
972 KB |
Output is correct |
7 |
Correct |
1 ms |
972 KB |
Output is correct |
8 |
Correct |
1 ms |
972 KB |
Output is correct |
9 |
Correct |
1 ms |
1036 KB |
Output is correct |
10 |
Correct |
1 ms |
1100 KB |
Output is correct |
11 |
Correct |
1 ms |
1100 KB |
Output is correct |
12 |
Correct |
1 ms |
1300 KB |
Output is correct |
13 |
Correct |
1 ms |
1356 KB |
Output is correct |
14 |
Correct |
2 ms |
1356 KB |
Output is correct |
15 |
Correct |
1 ms |
1356 KB |
Output is correct |
16 |
Correct |
1 ms |
972 KB |
Output is correct |
17 |
Correct |
3 ms |
3404 KB |
Output is correct |
18 |
Correct |
1 ms |
972 KB |
Output is correct |
19 |
Correct |
1 ms |
1000 KB |
Output is correct |
20 |
Correct |
6 ms |
8396 KB |
Output is correct |
21 |
Correct |
1 ms |
972 KB |
Output is correct |
22 |
Correct |
1 ms |
972 KB |
Output is correct |
23 |
Correct |
5 ms |
6352 KB |
Output is correct |
24 |
Correct |
6 ms |
7500 KB |
Output is correct |
25 |
Correct |
2 ms |
2380 KB |
Output is correct |
26 |
Correct |
5 ms |
7384 KB |
Output is correct |
27 |
Correct |
6 ms |
7640 KB |
Output is correct |
28 |
Correct |
7 ms |
8408 KB |
Output is correct |
29 |
Correct |
7 ms |
8408 KB |
Output is correct |
30 |
Correct |
6 ms |
8280 KB |
Output is correct |
31 |
Correct |
6 ms |
8336 KB |
Output is correct |
32 |
Correct |
6 ms |
8280 KB |
Output is correct |
33 |
Correct |
9 ms |
8408 KB |
Output is correct |
34 |
Correct |
7 ms |
8408 KB |
Output is correct |
35 |
Correct |
11 ms |
6996 KB |
Output is correct |
36 |
Correct |
3 ms |
2252 KB |
Output is correct |
37 |
Correct |
12 ms |
6696 KB |
Output is correct |
38 |
Correct |
13 ms |
5068 KB |
Output is correct |
39 |
Correct |
8 ms |
1816 KB |
Output is correct |
40 |
Correct |
9 ms |
2740 KB |
Output is correct |
41 |
Correct |
9 ms |
3404 KB |
Output is correct |
42 |
Correct |
9 ms |
7956 KB |
Output is correct |
43 |
Correct |
10 ms |
8268 KB |
Output is correct |
44 |
Correct |
10 ms |
8984 KB |
Output is correct |
45 |
Correct |
24 ms |
9296 KB |
Output is correct |
46 |
Correct |
17 ms |
9208 KB |
Output is correct |
47 |
Correct |
16 ms |
10480 KB |
Output is correct |
48 |
Correct |
7 ms |
1868 KB |
Output is correct |
49 |
Correct |
7 ms |
1816 KB |
Output is correct |
50 |
Correct |
5 ms |
1612 KB |
Output is correct |
51 |
Correct |
66 ms |
81972 KB |
Output is correct |
52 |
Correct |
72 ms |
90052 KB |
Output is correct |
53 |
Correct |
20 ms |
18880 KB |
Output is correct |
54 |
Correct |
38 ms |
61124 KB |
Output is correct |
55 |
Correct |
49 ms |
77740 KB |
Output is correct |
56 |
Correct |
77 ms |
112588 KB |
Output is correct |
57 |
Correct |
3 ms |
2636 KB |
Output is correct |
58 |
Correct |
74 ms |
111736 KB |
Output is correct |
59 |
Correct |
73 ms |
104072 KB |
Output is correct |
60 |
Correct |
72 ms |
103964 KB |
Output is correct |
61 |
Correct |
71 ms |
98884 KB |
Output is correct |
62 |
Correct |
119 ms |
112584 KB |
Output is correct |
63 |
Correct |
215 ms |
111972 KB |
Output is correct |
64 |
Correct |
243 ms |
111940 KB |
Output is correct |
65 |
Correct |
280 ms |
112172 KB |
Output is correct |
66 |
Correct |
447 ms |
112080 KB |
Output is correct |
67 |
Correct |
294 ms |
112060 KB |
Output is correct |