#include <bits/stdc++.h>
using namespace std;
int cor[30005][3];
vector<pair<int,int> > adj[7000000];
int32_t main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
int n,m;
cin >> n >> m;
int c=30001;
for(int i=0; i<n; i++){
for(int j=1; j<3; j++){
cor[i][j]=c;
c++;
}
}
for(int i=0; i<n; i++){
for(int j=1; j<3; j++){
if(i+j<n){
adj[cor[i][j]].push_back({cor[i+j][j],1});
adj[cor[i+j][j]].push_back({cor[i][j],1});
}
adj[cor[i][j]].push_back({i,0});
}
}
int s=0,e=0;
for(int i=0; i<m; i++){
int a,b;
cin >> a >> b;
if(i==0) s=a;
if(i==1) e=a;
if(b<3){
adj[a].push_back({cor[a][b],0});
}
else{
for(int j=1; j<n; j++){
if(a+j*b>=n) break;
adj[a].push_back({a+j*b,j});
}
for(int j=1; j<n; j++){
if(a-j*b<0) break;
adj[a].push_back({a-j*b,j});
}
}
}
priority_queue<pair<int,int>,vector<pair<int,int> >,greater<pair<int,int> > > pq;
pq.push({0,s});
int dist[5000000];
for(int i=0; i<5000000; i++) dist[i]=1e7;
dist[s]=0;
while(!pq.empty()){
int a=pq.top().first,b=pq.top().second;
pq.pop();
if(a>dist[b]) continue;
//cout << b << ' ' << a << '\n';
if(b==e){
cout << a;
return 0;
}
for(auto i:adj[b]){
if(dist[i.first]<=a+i.second) continue;
dist[i.first]=a+i.second;
pq.push({a+i.second,i.first});
}
}
cout << -1;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
84 ms |
184140 KB |
Output is correct |
2 |
Correct |
85 ms |
184184 KB |
Output is correct |
3 |
Correct |
86 ms |
184160 KB |
Output is correct |
4 |
Correct |
86 ms |
184224 KB |
Output is correct |
5 |
Correct |
92 ms |
184260 KB |
Output is correct |
6 |
Correct |
92 ms |
184172 KB |
Output is correct |
7 |
Correct |
85 ms |
184176 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
87 ms |
184340 KB |
Output is correct |
2 |
Correct |
87 ms |
184148 KB |
Output is correct |
3 |
Correct |
88 ms |
184140 KB |
Output is correct |
4 |
Correct |
100 ms |
184176 KB |
Output is correct |
5 |
Correct |
97 ms |
184212 KB |
Output is correct |
6 |
Correct |
86 ms |
184140 KB |
Output is correct |
7 |
Correct |
86 ms |
184260 KB |
Output is correct |
8 |
Correct |
86 ms |
184208 KB |
Output is correct |
9 |
Correct |
87 ms |
184320 KB |
Output is correct |
10 |
Correct |
91 ms |
184188 KB |
Output is correct |
11 |
Correct |
91 ms |
184268 KB |
Output is correct |
12 |
Correct |
88 ms |
184224 KB |
Output is correct |
13 |
Correct |
88 ms |
184192 KB |
Output is correct |
14 |
Correct |
87 ms |
184268 KB |
Output is correct |
15 |
Correct |
100 ms |
184312 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
88 ms |
184248 KB |
Output is correct |
2 |
Correct |
85 ms |
184236 KB |
Output is correct |
3 |
Correct |
86 ms |
184172 KB |
Output is correct |
4 |
Correct |
87 ms |
184244 KB |
Output is correct |
5 |
Correct |
88 ms |
184256 KB |
Output is correct |
6 |
Correct |
85 ms |
184144 KB |
Output is correct |
7 |
Correct |
84 ms |
184256 KB |
Output is correct |
8 |
Correct |
93 ms |
184260 KB |
Output is correct |
9 |
Correct |
85 ms |
184216 KB |
Output is correct |
10 |
Correct |
87 ms |
184200 KB |
Output is correct |
11 |
Correct |
86 ms |
184336 KB |
Output is correct |
12 |
Correct |
93 ms |
184208 KB |
Output is correct |
13 |
Correct |
94 ms |
184304 KB |
Output is correct |
14 |
Correct |
89 ms |
184264 KB |
Output is correct |
15 |
Correct |
90 ms |
184256 KB |
Output is correct |
16 |
Correct |
86 ms |
184272 KB |
Output is correct |
17 |
Correct |
88 ms |
184648 KB |
Output is correct |
18 |
Correct |
86 ms |
184524 KB |
Output is correct |
19 |
Correct |
87 ms |
184532 KB |
Output is correct |
20 |
Correct |
89 ms |
184480 KB |
Output is correct |
21 |
Correct |
88 ms |
184320 KB |
Output is correct |
22 |
Correct |
90 ms |
184464 KB |
Output is correct |
23 |
Correct |
95 ms |
184448 KB |
Output is correct |
24 |
Correct |
94 ms |
184676 KB |
Output is correct |
25 |
Correct |
94 ms |
184488 KB |
Output is correct |
26 |
Correct |
90 ms |
184536 KB |
Output is correct |
27 |
Correct |
101 ms |
184512 KB |
Output is correct |
28 |
Correct |
92 ms |
184640 KB |
Output is correct |
29 |
Correct |
89 ms |
185164 KB |
Output is correct |
30 |
Correct |
87 ms |
184704 KB |
Output is correct |
31 |
Correct |
87 ms |
184872 KB |
Output is correct |
32 |
Correct |
86 ms |
184636 KB |
Output is correct |
33 |
Correct |
89 ms |
185932 KB |
Output is correct |
34 |
Correct |
90 ms |
185752 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
88 ms |
184248 KB |
Output is correct |
2 |
Correct |
98 ms |
184296 KB |
Output is correct |
3 |
Correct |
93 ms |
184260 KB |
Output is correct |
4 |
Correct |
88 ms |
184268 KB |
Output is correct |
5 |
Correct |
88 ms |
184200 KB |
Output is correct |
6 |
Correct |
86 ms |
184252 KB |
Output is correct |
7 |
Correct |
83 ms |
184184 KB |
Output is correct |
8 |
Correct |
86 ms |
184264 KB |
Output is correct |
9 |
Correct |
89 ms |
184280 KB |
Output is correct |
10 |
Correct |
86 ms |
184168 KB |
Output is correct |
11 |
Correct |
88 ms |
184324 KB |
Output is correct |
12 |
Correct |
88 ms |
184392 KB |
Output is correct |
13 |
Correct |
88 ms |
184300 KB |
Output is correct |
14 |
Correct |
83 ms |
184316 KB |
Output is correct |
15 |
Correct |
93 ms |
184312 KB |
Output is correct |
16 |
Correct |
101 ms |
184336 KB |
Output is correct |
17 |
Correct |
92 ms |
184532 KB |
Output is correct |
18 |
Correct |
88 ms |
184516 KB |
Output is correct |
19 |
Correct |
90 ms |
184640 KB |
Output is correct |
20 |
Correct |
90 ms |
184540 KB |
Output is correct |
21 |
Correct |
90 ms |
184324 KB |
Output is correct |
22 |
Correct |
89 ms |
184448 KB |
Output is correct |
23 |
Correct |
89 ms |
184516 KB |
Output is correct |
24 |
Correct |
89 ms |
184636 KB |
Output is correct |
25 |
Correct |
92 ms |
184520 KB |
Output is correct |
26 |
Correct |
87 ms |
184488 KB |
Output is correct |
27 |
Correct |
92 ms |
184440 KB |
Output is correct |
28 |
Correct |
90 ms |
184684 KB |
Output is correct |
29 |
Correct |
100 ms |
185188 KB |
Output is correct |
30 |
Correct |
116 ms |
184620 KB |
Output is correct |
31 |
Correct |
100 ms |
184908 KB |
Output is correct |
32 |
Correct |
88 ms |
184668 KB |
Output is correct |
33 |
Correct |
97 ms |
185872 KB |
Output is correct |
34 |
Correct |
93 ms |
185836 KB |
Output is correct |
35 |
Correct |
95 ms |
185804 KB |
Output is correct |
36 |
Correct |
87 ms |
184584 KB |
Output is correct |
37 |
Correct |
92 ms |
187408 KB |
Output is correct |
38 |
Correct |
99 ms |
187012 KB |
Output is correct |
39 |
Correct |
115 ms |
186948 KB |
Output is correct |
40 |
Correct |
96 ms |
186912 KB |
Output is correct |
41 |
Correct |
95 ms |
186888 KB |
Output is correct |
42 |
Correct |
95 ms |
185112 KB |
Output is correct |
43 |
Correct |
92 ms |
185040 KB |
Output is correct |
44 |
Correct |
95 ms |
185032 KB |
Output is correct |
45 |
Correct |
117 ms |
189472 KB |
Output is correct |
46 |
Correct |
103 ms |
189516 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
86 ms |
184208 KB |
Output is correct |
2 |
Correct |
89 ms |
184240 KB |
Output is correct |
3 |
Correct |
88 ms |
184168 KB |
Output is correct |
4 |
Correct |
92 ms |
184256 KB |
Output is correct |
5 |
Correct |
86 ms |
184192 KB |
Output is correct |
6 |
Correct |
89 ms |
184164 KB |
Output is correct |
7 |
Correct |
98 ms |
184140 KB |
Output is correct |
8 |
Correct |
90 ms |
184228 KB |
Output is correct |
9 |
Correct |
91 ms |
184264 KB |
Output is correct |
10 |
Correct |
95 ms |
184240 KB |
Output is correct |
11 |
Correct |
97 ms |
184352 KB |
Output is correct |
12 |
Correct |
89 ms |
184192 KB |
Output is correct |
13 |
Correct |
89 ms |
184260 KB |
Output is correct |
14 |
Correct |
100 ms |
184276 KB |
Output is correct |
15 |
Correct |
96 ms |
184268 KB |
Output is correct |
16 |
Correct |
86 ms |
184424 KB |
Output is correct |
17 |
Correct |
89 ms |
184444 KB |
Output is correct |
18 |
Correct |
87 ms |
184396 KB |
Output is correct |
19 |
Correct |
92 ms |
184400 KB |
Output is correct |
20 |
Correct |
95 ms |
184528 KB |
Output is correct |
21 |
Correct |
85 ms |
184268 KB |
Output is correct |
22 |
Correct |
87 ms |
184376 KB |
Output is correct |
23 |
Correct |
87 ms |
184424 KB |
Output is correct |
24 |
Correct |
95 ms |
184652 KB |
Output is correct |
25 |
Correct |
94 ms |
184540 KB |
Output is correct |
26 |
Correct |
101 ms |
184596 KB |
Output is correct |
27 |
Correct |
111 ms |
184532 KB |
Output is correct |
28 |
Correct |
94 ms |
184640 KB |
Output is correct |
29 |
Correct |
91 ms |
185240 KB |
Output is correct |
30 |
Correct |
92 ms |
184652 KB |
Output is correct |
31 |
Correct |
91 ms |
184856 KB |
Output is correct |
32 |
Correct |
87 ms |
184644 KB |
Output is correct |
33 |
Correct |
97 ms |
185852 KB |
Output is correct |
34 |
Correct |
107 ms |
185784 KB |
Output is correct |
35 |
Correct |
104 ms |
185884 KB |
Output is correct |
36 |
Correct |
93 ms |
184472 KB |
Output is correct |
37 |
Correct |
96 ms |
187372 KB |
Output is correct |
38 |
Correct |
95 ms |
186972 KB |
Output is correct |
39 |
Correct |
98 ms |
186844 KB |
Output is correct |
40 |
Correct |
98 ms |
186956 KB |
Output is correct |
41 |
Correct |
96 ms |
186948 KB |
Output is correct |
42 |
Correct |
91 ms |
185168 KB |
Output is correct |
43 |
Correct |
90 ms |
185024 KB |
Output is correct |
44 |
Correct |
96 ms |
184996 KB |
Output is correct |
45 |
Correct |
162 ms |
189508 KB |
Output is correct |
46 |
Correct |
98 ms |
189480 KB |
Output is correct |
47 |
Correct |
115 ms |
195756 KB |
Output is correct |
48 |
Correct |
109 ms |
189172 KB |
Output is correct |
49 |
Correct |
114 ms |
188664 KB |
Output is correct |
50 |
Correct |
110 ms |
188620 KB |
Output is correct |
51 |
Correct |
114 ms |
191464 KB |
Output is correct |
52 |
Correct |
117 ms |
191548 KB |
Output is correct |
53 |
Correct |
106 ms |
187896 KB |
Output is correct |
54 |
Correct |
97 ms |
187404 KB |
Output is correct |
55 |
Correct |
97 ms |
187596 KB |
Output is correct |
56 |
Correct |
103 ms |
188528 KB |
Output is correct |
57 |
Correct |
172 ms |
245092 KB |
Output is correct |
58 |
Correct |
107 ms |
188268 KB |
Output is correct |
59 |
Correct |
98 ms |
188868 KB |
Output is correct |
60 |
Correct |
99 ms |
189532 KB |
Output is correct |
61 |
Correct |
113 ms |
188592 KB |
Output is correct |
62 |
Correct |
117 ms |
192216 KB |
Output is correct |
63 |
Correct |
150 ms |
212372 KB |
Output is correct |
64 |
Correct |
153 ms |
220136 KB |
Output is correct |
65 |
Correct |
176 ms |
226380 KB |
Output is correct |
66 |
Correct |
240 ms |
258696 KB |
Output is correct |
67 |
Correct |
263 ms |
260468 KB |
Output is correct |