#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 5226152+12, MOD = (int)1e9+7;
const int M = 3e4 + 21;
short n,m,b[M];
int ft[M];
vector<int> g[N];
vector<pair<short,short>> x[M];
void add(int v,int u) {
g[v].push_back(u);
g[u].push_back(v);
}
bool sgn(int x) {
return (x < n);
}
int d[N];
void test() {
cin >> n >> m;
for(int i = 0;i < m;i++) {
int p;
cin >> b[i] >> p;
int d = b[i] % p;
x[p].emplace_back(d,i);
}
int it = n - 1;
for(int i = 1;i < n;i++){
sort(x[i].begin(),x[i].end());
for(int j = 0;j < (int)x[i].size();j++){
if(!j || x[i][j].first != x[i][j - 1].first){
// cout << i << ' ';
for(int k = x[i][j].first;k < n;k += i){
ft[k] = ++it;
if(k - i >= 0){
add(ft[k - i],ft[k]);
}
g[ft[k]].push_back(k);
}
}
int v = b[x[i][j].second];
g[v].push_back(ft[v]);
}
}
deque<int> q;
for(int i = 0;i <= it;i++){
d[i] = 1e9;
}
d[b[0]] = 0;
q.push_front(b[0]);
while(!q.empty()){
int v = q[0];
q.pop_front();
for(int to:g[v]){
int w = (sgn(v) == sgn(to));
if(d[to] > d[v] + w){
d[to] = d[v] + w;
if(w == 0){
q.push_front(to);
}else{
q.push_back(to);
}
}
}
}
if(d[b[1]] == 1e9){
d[b[1]] = -1;
}
cout << d[b[1]];
}
int main() {
ios_base::sync_with_stdio(false);cin.tie(0);
int t = 1;
// cin >> t;
while(t--) {
test();
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
48 ms |
123728 KB |
Output is correct |
2 |
Correct |
50 ms |
123732 KB |
Output is correct |
3 |
Correct |
49 ms |
123660 KB |
Output is correct |
4 |
Correct |
52 ms |
123732 KB |
Output is correct |
5 |
Correct |
51 ms |
123776 KB |
Output is correct |
6 |
Correct |
57 ms |
123732 KB |
Output is correct |
7 |
Correct |
54 ms |
123864 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
54 ms |
123736 KB |
Output is correct |
2 |
Correct |
53 ms |
123840 KB |
Output is correct |
3 |
Correct |
49 ms |
123840 KB |
Output is correct |
4 |
Correct |
51 ms |
123732 KB |
Output is correct |
5 |
Correct |
49 ms |
123732 KB |
Output is correct |
6 |
Correct |
51 ms |
123828 KB |
Output is correct |
7 |
Correct |
50 ms |
123652 KB |
Output is correct |
8 |
Correct |
54 ms |
123732 KB |
Output is correct |
9 |
Correct |
51 ms |
123732 KB |
Output is correct |
10 |
Correct |
49 ms |
123788 KB |
Output is correct |
11 |
Correct |
51 ms |
123988 KB |
Output is correct |
12 |
Correct |
48 ms |
123696 KB |
Output is correct |
13 |
Correct |
48 ms |
123732 KB |
Output is correct |
14 |
Correct |
53 ms |
123988 KB |
Output is correct |
15 |
Correct |
52 ms |
123988 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
49 ms |
123740 KB |
Output is correct |
2 |
Correct |
51 ms |
123764 KB |
Output is correct |
3 |
Correct |
53 ms |
123736 KB |
Output is correct |
4 |
Correct |
51 ms |
123740 KB |
Output is correct |
5 |
Correct |
54 ms |
123744 KB |
Output is correct |
6 |
Correct |
52 ms |
123744 KB |
Output is correct |
7 |
Correct |
53 ms |
123732 KB |
Output is correct |
8 |
Correct |
52 ms |
123728 KB |
Output is correct |
9 |
Correct |
56 ms |
123892 KB |
Output is correct |
10 |
Correct |
52 ms |
123728 KB |
Output is correct |
11 |
Correct |
53 ms |
124032 KB |
Output is correct |
12 |
Correct |
54 ms |
123680 KB |
Output is correct |
13 |
Correct |
54 ms |
123732 KB |
Output is correct |
14 |
Correct |
55 ms |
124060 KB |
Output is correct |
15 |
Correct |
55 ms |
123988 KB |
Output is correct |
16 |
Correct |
57 ms |
123988 KB |
Output is correct |
17 |
Correct |
54 ms |
124240 KB |
Output is correct |
18 |
Correct |
54 ms |
124100 KB |
Output is correct |
19 |
Correct |
55 ms |
123932 KB |
Output is correct |
20 |
Correct |
54 ms |
124028 KB |
Output is correct |
21 |
Correct |
53 ms |
123840 KB |
Output is correct |
22 |
Correct |
54 ms |
124048 KB |
Output is correct |
23 |
Correct |
56 ms |
123984 KB |
Output is correct |
24 |
Correct |
53 ms |
124240 KB |
Output is correct |
25 |
Correct |
54 ms |
123988 KB |
Output is correct |
26 |
Correct |
58 ms |
123944 KB |
Output is correct |
27 |
Correct |
54 ms |
123988 KB |
Output is correct |
28 |
Correct |
65 ms |
124756 KB |
Output is correct |
29 |
Correct |
60 ms |
126024 KB |
Output is correct |
30 |
Correct |
56 ms |
124508 KB |
Output is correct |
31 |
Correct |
57 ms |
125008 KB |
Output is correct |
32 |
Correct |
60 ms |
124496 KB |
Output is correct |
33 |
Correct |
63 ms |
128084 KB |
Output is correct |
34 |
Correct |
64 ms |
128080 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
51 ms |
123732 KB |
Output is correct |
2 |
Correct |
51 ms |
123696 KB |
Output is correct |
3 |
Correct |
47 ms |
123728 KB |
Output is correct |
4 |
Correct |
55 ms |
123732 KB |
Output is correct |
5 |
Correct |
47 ms |
123740 KB |
Output is correct |
6 |
Correct |
48 ms |
123732 KB |
Output is correct |
7 |
Correct |
48 ms |
123864 KB |
Output is correct |
8 |
Correct |
49 ms |
123648 KB |
Output is correct |
9 |
Correct |
52 ms |
123776 KB |
Output is correct |
10 |
Correct |
57 ms |
123728 KB |
Output is correct |
11 |
Correct |
56 ms |
124100 KB |
Output is correct |
12 |
Correct |
54 ms |
123928 KB |
Output is correct |
13 |
Correct |
57 ms |
123728 KB |
Output is correct |
14 |
Correct |
55 ms |
123916 KB |
Output is correct |
15 |
Correct |
59 ms |
123988 KB |
Output is correct |
16 |
Correct |
55 ms |
123924 KB |
Output is correct |
17 |
Correct |
57 ms |
124244 KB |
Output is correct |
18 |
Correct |
56 ms |
124160 KB |
Output is correct |
19 |
Correct |
54 ms |
123992 KB |
Output is correct |
20 |
Correct |
56 ms |
123820 KB |
Output is correct |
21 |
Correct |
60 ms |
123988 KB |
Output is correct |
22 |
Correct |
57 ms |
124092 KB |
Output is correct |
23 |
Correct |
56 ms |
123988 KB |
Output is correct |
24 |
Correct |
56 ms |
124284 KB |
Output is correct |
25 |
Correct |
54 ms |
124148 KB |
Output is correct |
26 |
Correct |
56 ms |
124204 KB |
Output is correct |
27 |
Correct |
54 ms |
123984 KB |
Output is correct |
28 |
Correct |
75 ms |
124568 KB |
Output is correct |
29 |
Correct |
66 ms |
126036 KB |
Output is correct |
30 |
Correct |
55 ms |
124500 KB |
Output is correct |
31 |
Correct |
57 ms |
125008 KB |
Output is correct |
32 |
Correct |
64 ms |
124496 KB |
Output is correct |
33 |
Correct |
64 ms |
128088 KB |
Output is correct |
34 |
Correct |
66 ms |
128084 KB |
Output is correct |
35 |
Correct |
68 ms |
127768 KB |
Output is correct |
36 |
Correct |
58 ms |
124496 KB |
Output is correct |
37 |
Correct |
78 ms |
130396 KB |
Output is correct |
38 |
Correct |
79 ms |
130384 KB |
Output is correct |
39 |
Correct |
74 ms |
130280 KB |
Output is correct |
40 |
Correct |
76 ms |
130384 KB |
Output is correct |
41 |
Correct |
75 ms |
130384 KB |
Output is correct |
42 |
Correct |
59 ms |
124592 KB |
Output is correct |
43 |
Correct |
58 ms |
124496 KB |
Output is correct |
44 |
Correct |
62 ms |
124496 KB |
Output is correct |
45 |
Correct |
104 ms |
141504 KB |
Output is correct |
46 |
Correct |
105 ms |
141396 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
55 ms |
123732 KB |
Output is correct |
2 |
Correct |
52 ms |
123692 KB |
Output is correct |
3 |
Correct |
55 ms |
123732 KB |
Output is correct |
4 |
Correct |
55 ms |
123660 KB |
Output is correct |
5 |
Correct |
55 ms |
123728 KB |
Output is correct |
6 |
Correct |
55 ms |
123728 KB |
Output is correct |
7 |
Correct |
55 ms |
123728 KB |
Output is correct |
8 |
Correct |
55 ms |
123728 KB |
Output is correct |
9 |
Correct |
54 ms |
123728 KB |
Output is correct |
10 |
Correct |
53 ms |
123728 KB |
Output is correct |
11 |
Correct |
64 ms |
124096 KB |
Output is correct |
12 |
Correct |
54 ms |
123728 KB |
Output is correct |
13 |
Correct |
61 ms |
123732 KB |
Output is correct |
14 |
Correct |
57 ms |
123984 KB |
Output is correct |
15 |
Correct |
54 ms |
123988 KB |
Output is correct |
16 |
Correct |
59 ms |
123988 KB |
Output is correct |
17 |
Correct |
56 ms |
124240 KB |
Output is correct |
18 |
Correct |
52 ms |
123984 KB |
Output is correct |
19 |
Correct |
54 ms |
123988 KB |
Output is correct |
20 |
Correct |
56 ms |
123992 KB |
Output is correct |
21 |
Correct |
53 ms |
123984 KB |
Output is correct |
22 |
Correct |
55 ms |
124140 KB |
Output is correct |
23 |
Correct |
53 ms |
123984 KB |
Output is correct |
24 |
Correct |
53 ms |
124240 KB |
Output is correct |
25 |
Correct |
52 ms |
124244 KB |
Output is correct |
26 |
Correct |
52 ms |
123988 KB |
Output is correct |
27 |
Correct |
55 ms |
124180 KB |
Output is correct |
28 |
Correct |
60 ms |
124752 KB |
Output is correct |
29 |
Correct |
54 ms |
126036 KB |
Output is correct |
30 |
Correct |
50 ms |
124500 KB |
Output is correct |
31 |
Correct |
51 ms |
125020 KB |
Output is correct |
32 |
Correct |
54 ms |
124500 KB |
Output is correct |
33 |
Correct |
62 ms |
128124 KB |
Output is correct |
34 |
Correct |
65 ms |
128084 KB |
Output is correct |
35 |
Correct |
72 ms |
127828 KB |
Output is correct |
36 |
Correct |
52 ms |
124596 KB |
Output is correct |
37 |
Correct |
84 ms |
130388 KB |
Output is correct |
38 |
Correct |
85 ms |
130412 KB |
Output is correct |
39 |
Correct |
85 ms |
130364 KB |
Output is correct |
40 |
Correct |
84 ms |
130180 KB |
Output is correct |
41 |
Correct |
97 ms |
130168 KB |
Output is correct |
42 |
Correct |
71 ms |
124552 KB |
Output is correct |
43 |
Correct |
60 ms |
124500 KB |
Output is correct |
44 |
Correct |
76 ms |
124500 KB |
Output is correct |
45 |
Correct |
114 ms |
141392 KB |
Output is correct |
46 |
Correct |
122 ms |
141372 KB |
Output is correct |
47 |
Correct |
161 ms |
150868 KB |
Output is correct |
48 |
Correct |
83 ms |
133364 KB |
Output is correct |
49 |
Correct |
92 ms |
130132 KB |
Output is correct |
50 |
Correct |
72 ms |
129944 KB |
Output is correct |
51 |
Correct |
110 ms |
136776 KB |
Output is correct |
52 |
Correct |
107 ms |
137676 KB |
Output is correct |
53 |
Correct |
100 ms |
128340 KB |
Output is correct |
54 |
Correct |
57 ms |
125012 KB |
Output is correct |
55 |
Correct |
57 ms |
125968 KB |
Output is correct |
56 |
Correct |
83 ms |
126332 KB |
Output is correct |
57 |
Correct |
109 ms |
139376 KB |
Output is correct |
58 |
Correct |
64 ms |
126760 KB |
Output is correct |
59 |
Correct |
66 ms |
127828 KB |
Output is correct |
60 |
Correct |
78 ms |
128788 KB |
Output is correct |
61 |
Correct |
68 ms |
128592 KB |
Output is correct |
62 |
Correct |
111 ms |
142912 KB |
Output is correct |
63 |
Correct |
347 ms |
205208 KB |
Output is correct |
64 |
Correct |
418 ms |
223404 KB |
Output is correct |
65 |
Runtime error |
343 ms |
262144 KB |
Execution killed with signal 9 |
66 |
Halted |
0 ms |
0 KB |
- |