#include<bits/stdc++.h>
//#pragma GCC optimize("O2")
using namespace std;
using ll = long long;
using ld = long double;
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define sz(x) (int)x.size()
#define endl '\n'
const int mod = 1e9 + 7;
const int inf = 1e9 + 5;
const ll linf = 9e18 + 5;
int n, m;
const int N = 2e3 + 5;
int arr[N][2];
int w[N][N];
int dist[N];
void init() {
}
void input() {
cin >> m >> n;
for (int i = 1; i <= n; i++) {
cin >> arr[i][0] >> arr[i][1];
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
if (abs(arr[j][0] - arr[i][0]) % arr[i][1] == 0) {
w[i][j] = abs(arr[j][0] - arr[i][0]) / arr[i][1];
}
else {
w[i][j] = inf;
}
}
}
}
void dijk() {
set<pair<int, int>> dists;
for (int i = 1; i <= n; i++) {
dist[i] = inf;
dists.insert(mp(dist[i], i));
}
dists.erase(mp(dist[1], 1));
dist[1] = 0;
dists.insert(mp(dist[1], 1));
while (!dists.empty()) {
int u = dists.begin()->se;
dists.erase(dists.begin());
for (int v = 1; v <= n; v++) {
if (dist[v] > dist[u] + w[u][v]) {
dists.erase(mp(dist[v], v));
dist[v] = dist[u] + w[u][v];
dists.insert(mp(dist[v], v));
}
}
}
}
void solve() {
dijk();
if (dist[2] == inf) {
cout << -1;
}
else {
cout << dist[2];
}
}
void output() {
}
int main() {
ios::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
int number_of_testcases = 1;
//cin >> number_of_testcases;
while (number_of_testcases--) {
init();
input();
solve();
output();
}
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
224 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
340 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
340 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
340 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
0 ms |
340 KB |
Output is correct |
8 |
Correct |
1 ms |
340 KB |
Output is correct |
9 |
Correct |
0 ms |
468 KB |
Output is correct |
10 |
Correct |
2 ms |
2516 KB |
Output is correct |
11 |
Correct |
30 ms |
16108 KB |
Output is correct |
12 |
Correct |
29 ms |
16060 KB |
Output is correct |
13 |
Correct |
28 ms |
16112 KB |
Output is correct |
14 |
Correct |
29 ms |
16140 KB |
Output is correct |
15 |
Correct |
28 ms |
16080 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
340 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
0 ms |
340 KB |
Output is correct |
8 |
Correct |
0 ms |
340 KB |
Output is correct |
9 |
Correct |
1 ms |
468 KB |
Output is correct |
10 |
Correct |
2 ms |
2516 KB |
Output is correct |
11 |
Correct |
29 ms |
16084 KB |
Output is correct |
12 |
Correct |
28 ms |
16116 KB |
Output is correct |
13 |
Correct |
28 ms |
16088 KB |
Output is correct |
14 |
Correct |
28 ms |
16108 KB |
Output is correct |
15 |
Correct |
29 ms |
16060 KB |
Output is correct |
16 |
Correct |
7 ms |
6468 KB |
Output is correct |
17 |
Correct |
24 ms |
14360 KB |
Output is correct |
18 |
Correct |
9 ms |
8148 KB |
Output is correct |
19 |
Correct |
3 ms |
3668 KB |
Output is correct |
20 |
Correct |
33 ms |
16064 KB |
Output is correct |
21 |
Correct |
12 ms |
9488 KB |
Output is correct |
22 |
Correct |
5 ms |
5204 KB |
Output is correct |
23 |
Correct |
8 ms |
7764 KB |
Output is correct |
24 |
Correct |
26 ms |
15180 KB |
Output is correct |
25 |
Correct |
28 ms |
16092 KB |
Output is correct |
26 |
Correct |
29 ms |
16124 KB |
Output is correct |
27 |
Correct |
29 ms |
16076 KB |
Output is correct |
28 |
Correct |
30 ms |
16112 KB |
Output is correct |
29 |
Correct |
6 ms |
5500 KB |
Output is correct |
30 |
Correct |
1 ms |
1108 KB |
Output is correct |
31 |
Correct |
4 ms |
4052 KB |
Output is correct |
32 |
Correct |
3 ms |
3156 KB |
Output is correct |
33 |
Correct |
29 ms |
16076 KB |
Output is correct |
34 |
Correct |
29 ms |
16120 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
0 ms |
340 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
1 ms |
340 KB |
Output is correct |
8 |
Correct |
0 ms |
340 KB |
Output is correct |
9 |
Correct |
1 ms |
468 KB |
Output is correct |
10 |
Correct |
2 ms |
2516 KB |
Output is correct |
11 |
Correct |
29 ms |
16068 KB |
Output is correct |
12 |
Correct |
29 ms |
16144 KB |
Output is correct |
13 |
Correct |
28 ms |
16084 KB |
Output is correct |
14 |
Correct |
29 ms |
16084 KB |
Output is correct |
15 |
Correct |
29 ms |
16108 KB |
Output is correct |
16 |
Correct |
7 ms |
6492 KB |
Output is correct |
17 |
Correct |
24 ms |
14304 KB |
Output is correct |
18 |
Correct |
9 ms |
8148 KB |
Output is correct |
19 |
Correct |
4 ms |
3668 KB |
Output is correct |
20 |
Correct |
33 ms |
16084 KB |
Output is correct |
21 |
Correct |
11 ms |
9556 KB |
Output is correct |
22 |
Correct |
5 ms |
5204 KB |
Output is correct |
23 |
Correct |
9 ms |
7748 KB |
Output is correct |
24 |
Correct |
27 ms |
15200 KB |
Output is correct |
25 |
Correct |
29 ms |
16084 KB |
Output is correct |
26 |
Correct |
29 ms |
16124 KB |
Output is correct |
27 |
Correct |
29 ms |
16076 KB |
Output is correct |
28 |
Correct |
28 ms |
16076 KB |
Output is correct |
29 |
Correct |
6 ms |
5456 KB |
Output is correct |
30 |
Correct |
1 ms |
1108 KB |
Output is correct |
31 |
Correct |
4 ms |
4052 KB |
Output is correct |
32 |
Correct |
3 ms |
3156 KB |
Output is correct |
33 |
Correct |
29 ms |
16120 KB |
Output is correct |
34 |
Correct |
29 ms |
16060 KB |
Output is correct |
35 |
Incorrect |
6 ms |
5972 KB |
Output isn't correct |
36 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
340 KB |
Output is correct |
4 |
Correct |
0 ms |
340 KB |
Output is correct |
5 |
Correct |
0 ms |
340 KB |
Output is correct |
6 |
Correct |
1 ms |
340 KB |
Output is correct |
7 |
Correct |
0 ms |
340 KB |
Output is correct |
8 |
Correct |
0 ms |
340 KB |
Output is correct |
9 |
Correct |
0 ms |
468 KB |
Output is correct |
10 |
Correct |
3 ms |
2516 KB |
Output is correct |
11 |
Correct |
29 ms |
16072 KB |
Output is correct |
12 |
Correct |
28 ms |
16084 KB |
Output is correct |
13 |
Correct |
29 ms |
16060 KB |
Output is correct |
14 |
Correct |
35 ms |
16020 KB |
Output is correct |
15 |
Correct |
29 ms |
16068 KB |
Output is correct |
16 |
Correct |
8 ms |
6484 KB |
Output is correct |
17 |
Correct |
27 ms |
14344 KB |
Output is correct |
18 |
Correct |
10 ms |
8040 KB |
Output is correct |
19 |
Correct |
5 ms |
3668 KB |
Output is correct |
20 |
Correct |
34 ms |
16084 KB |
Output is correct |
21 |
Correct |
12 ms |
9584 KB |
Output is correct |
22 |
Correct |
5 ms |
5204 KB |
Output is correct |
23 |
Correct |
9 ms |
7764 KB |
Output is correct |
24 |
Correct |
27 ms |
15144 KB |
Output is correct |
25 |
Correct |
29 ms |
16084 KB |
Output is correct |
26 |
Correct |
29 ms |
16016 KB |
Output is correct |
27 |
Correct |
36 ms |
16064 KB |
Output is correct |
28 |
Correct |
30 ms |
16140 KB |
Output is correct |
29 |
Correct |
7 ms |
5460 KB |
Output is correct |
30 |
Correct |
1 ms |
1108 KB |
Output is correct |
31 |
Correct |
4 ms |
4052 KB |
Output is correct |
32 |
Correct |
3 ms |
3180 KB |
Output is correct |
33 |
Correct |
30 ms |
16084 KB |
Output is correct |
34 |
Correct |
31 ms |
16116 KB |
Output is correct |
35 |
Incorrect |
7 ms |
5900 KB |
Output isn't correct |
36 |
Halted |
0 ms |
0 KB |
- |