#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define endl '\n'
const int N = 3e4 + 5;
const int SQ = 50;
vector<int> adj1[N][SQ];
vector<int> adj11[N][SQ];
vector<pair<int,int>> r_adj1[N];
vector<pair<int,int>> adj2[N];
vector<int> r_adj2[N];
ll dis[3][N][SQ];
void solve(){
int n,m;
cin>>n>>m;
vector<pair<int,int>> d(m);
for(auto &[i,p] : d) cin>>i>>p;
vector<vector<int>> dogs(n+1);
for(int i=0;i<m;i++) dogs[d[i].first].push_back(i);
for(int i=0;i<n;i++){
for(int j=1;j<SQ;j++){
adj1[i][j].push_back(i);
if(i+j<n) adj11[i][j].push_back(i+j) ;
if(i-j>=0) adj11[i][j].push_back(i-j);
}
}
for(int i=0;i<n;i++){
for(auto j : dogs[i]){
if(d[j].second < SQ) r_adj1[i].push_back({d[j].first,d[j].second});
else r_adj2[i].push_back(j);
}
}
for(int j=0;j<m;j++){
auto [i,p] = d[j];
if(p < SQ) continue;
for(int k=i+p;k<n;k+=p) adj2[j].push_back({k,(k-i)/p});
for(int k=i-p;k>=0;k-=p) adj2[j].push_back({k,(i-k)/p});
}
priority_queue<array<ll,4>,vector<array<ll,4>>,greater<>> q;
for(int i=0;i<N;i++) for(int j=0;j<SQ;j++) dis[0][i][j] = dis[1][i][j] = dis[2][i][j] = 1e18;
dis[0][d[0].first][0] = 0;
q.push({0,0,d[0].first,0});
while(q.size()){
auto [c,t,i,p] = q.top(); q.pop();
if(c > dis[t][i][p]) continue;
if(t == 0){
for(auto [ii,pp] : r_adj1[i]){
if(c < dis[1][ii][pp]) {
//cout<<"HI"<<endl;
q.push({c,1,ii,pp});
dis[1][ii][pp] = c;
}
}
for(auto j : r_adj2[i]){
if(c < dis[2][j][0]){
q.push({c,2,j,0});
dis[2][j][0] = c;
}
}
}
else if(t == 1){
//if(t == 1 && i == 4 && p == 1) cout<<"WOW"<<endl;
for(auto j : adj1[i][p]){
if(c < dis[0][j][0]){
//if(i == 0 && p == 2) cout<<j<<endl;
q.push({c,0,j,0});
dis[0][j][0] = c;
}
}
for(auto j : adj11[i][p]){
//if(t == 1 && i == 4 && p == 1) cout<<"mm"<<endl;
if(c+1 < dis[1][j][p]){
//if(t == 1 && i == 4 && p == 1) cout<<j<<' '<<p<<endl;
q.push({c+1,1,j,p});
dis[1][j][p] = c+1;
}
}
}
else {
for(auto [j,cost] : adj2[i]){
if(c + cost < dis[0][j][0]){
q.push({c+cost,0,j,0});
dis[0][j][0] = c + cost;
}
}
}
}
cout<<(dis[0][d[1].first][0] == 1e18 ? -1 : dis[0][d[1].first][0])<<endl;
}
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
int t=1;
//cin>>t;
while(t--){
solve();
}
return 0;
}
Compilation message
skyscraper.cpp: In function 'void solve()':
skyscraper.cpp:18:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
18 | for(auto &[i,p] : d) cin>>i>>p;
| ^
skyscraper.cpp:36:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
36 | auto [i,p] = d[j];
| ^
skyscraper.cpp:46:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
46 | auto [c,t,i,p] = q.top(); q.pop();
| ^
skyscraper.cpp:49:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
49 | for(auto [ii,pp] : r_adj1[i]){
| ^
skyscraper.cpp:85:22: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
85 | for(auto [j,cost] : adj2[i]){
| ^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
19 ms |
108112 KB |
Output is correct |
2 |
Correct |
19 ms |
108112 KB |
Output is correct |
3 |
Correct |
19 ms |
108188 KB |
Output is correct |
4 |
Correct |
20 ms |
108224 KB |
Output is correct |
5 |
Correct |
19 ms |
108112 KB |
Output is correct |
6 |
Correct |
18 ms |
108112 KB |
Output is correct |
7 |
Correct |
19 ms |
108112 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
19 ms |
108112 KB |
Output is correct |
2 |
Correct |
19 ms |
108028 KB |
Output is correct |
3 |
Correct |
19 ms |
108112 KB |
Output is correct |
4 |
Correct |
20 ms |
108112 KB |
Output is correct |
5 |
Correct |
20 ms |
108112 KB |
Output is correct |
6 |
Correct |
21 ms |
108244 KB |
Output is correct |
7 |
Correct |
19 ms |
108240 KB |
Output is correct |
8 |
Correct |
20 ms |
108112 KB |
Output is correct |
9 |
Correct |
20 ms |
108368 KB |
Output is correct |
10 |
Correct |
22 ms |
108368 KB |
Output is correct |
11 |
Correct |
20 ms |
108624 KB |
Output is correct |
12 |
Correct |
22 ms |
108624 KB |
Output is correct |
13 |
Correct |
20 ms |
108636 KB |
Output is correct |
14 |
Correct |
24 ms |
108624 KB |
Output is correct |
15 |
Correct |
27 ms |
108616 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
24 ms |
108244 KB |
Output is correct |
2 |
Correct |
25 ms |
108112 KB |
Output is correct |
3 |
Correct |
26 ms |
108088 KB |
Output is correct |
4 |
Correct |
30 ms |
108184 KB |
Output is correct |
5 |
Correct |
26 ms |
108112 KB |
Output is correct |
6 |
Correct |
21 ms |
108112 KB |
Output is correct |
7 |
Correct |
19 ms |
108112 KB |
Output is correct |
8 |
Correct |
19 ms |
108124 KB |
Output is correct |
9 |
Correct |
23 ms |
108368 KB |
Output is correct |
10 |
Correct |
21 ms |
108536 KB |
Output is correct |
11 |
Correct |
29 ms |
108624 KB |
Output is correct |
12 |
Correct |
27 ms |
108616 KB |
Output is correct |
13 |
Correct |
25 ms |
108624 KB |
Output is correct |
14 |
Correct |
29 ms |
108624 KB |
Output is correct |
15 |
Correct |
30 ms |
108600 KB |
Output is correct |
16 |
Correct |
24 ms |
108880 KB |
Output is correct |
17 |
Correct |
33 ms |
110800 KB |
Output is correct |
18 |
Correct |
31 ms |
113744 KB |
Output is correct |
19 |
Correct |
34 ms |
114308 KB |
Output is correct |
20 |
Correct |
29 ms |
114504 KB |
Output is correct |
21 |
Correct |
28 ms |
109396 KB |
Output is correct |
22 |
Correct |
34 ms |
113736 KB |
Output is correct |
23 |
Correct |
32 ms |
113232 KB |
Output is correct |
24 |
Correct |
35 ms |
114256 KB |
Output is correct |
25 |
Correct |
35 ms |
114380 KB |
Output is correct |
26 |
Correct |
33 ms |
114512 KB |
Output is correct |
27 |
Correct |
33 ms |
114512 KB |
Output is correct |
28 |
Correct |
36 ms |
114448 KB |
Output is correct |
29 |
Correct |
53 ms |
114504 KB |
Output is correct |
30 |
Correct |
39 ms |
114300 KB |
Output is correct |
31 |
Correct |
45 ms |
114612 KB |
Output is correct |
32 |
Correct |
37 ms |
114504 KB |
Output is correct |
33 |
Correct |
47 ms |
115148 KB |
Output is correct |
34 |
Correct |
45 ms |
115036 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
19 ms |
108112 KB |
Output is correct |
2 |
Correct |
19 ms |
108112 KB |
Output is correct |
3 |
Correct |
20 ms |
108112 KB |
Output is correct |
4 |
Correct |
19 ms |
108268 KB |
Output is correct |
5 |
Correct |
27 ms |
108260 KB |
Output is correct |
6 |
Correct |
29 ms |
108180 KB |
Output is correct |
7 |
Correct |
27 ms |
108124 KB |
Output is correct |
8 |
Correct |
25 ms |
108112 KB |
Output is correct |
9 |
Correct |
22 ms |
108368 KB |
Output is correct |
10 |
Correct |
33 ms |
108360 KB |
Output is correct |
11 |
Correct |
27 ms |
108624 KB |
Output is correct |
12 |
Correct |
24 ms |
108624 KB |
Output is correct |
13 |
Correct |
26 ms |
108636 KB |
Output is correct |
14 |
Correct |
27 ms |
108624 KB |
Output is correct |
15 |
Correct |
29 ms |
108616 KB |
Output is correct |
16 |
Correct |
28 ms |
108892 KB |
Output is correct |
17 |
Correct |
29 ms |
110576 KB |
Output is correct |
18 |
Correct |
35 ms |
113736 KB |
Output is correct |
19 |
Correct |
30 ms |
114524 KB |
Output is correct |
20 |
Correct |
30 ms |
114504 KB |
Output is correct |
21 |
Correct |
30 ms |
109488 KB |
Output is correct |
22 |
Correct |
35 ms |
113732 KB |
Output is correct |
23 |
Correct |
37 ms |
113232 KB |
Output is correct |
24 |
Correct |
41 ms |
114268 KB |
Output is correct |
25 |
Correct |
32 ms |
114504 KB |
Output is correct |
26 |
Correct |
33 ms |
114512 KB |
Output is correct |
27 |
Correct |
31 ms |
114504 KB |
Output is correct |
28 |
Correct |
34 ms |
114504 KB |
Output is correct |
29 |
Correct |
41 ms |
114504 KB |
Output is correct |
30 |
Correct |
35 ms |
114256 KB |
Output is correct |
31 |
Correct |
44 ms |
114512 KB |
Output is correct |
32 |
Correct |
39 ms |
114504 KB |
Output is correct |
33 |
Correct |
55 ms |
115156 KB |
Output is correct |
34 |
Correct |
46 ms |
115016 KB |
Output is correct |
35 |
Correct |
59 ms |
114880 KB |
Output is correct |
36 |
Correct |
35 ms |
111952 KB |
Output is correct |
37 |
Correct |
59 ms |
117216 KB |
Output is correct |
38 |
Correct |
63 ms |
117448 KB |
Output is correct |
39 |
Correct |
77 ms |
117440 KB |
Output is correct |
40 |
Correct |
62 ms |
117448 KB |
Output is correct |
41 |
Correct |
62 ms |
117444 KB |
Output is correct |
42 |
Correct |
34 ms |
115148 KB |
Output is correct |
43 |
Correct |
38 ms |
115156 KB |
Output is correct |
44 |
Correct |
33 ms |
115156 KB |
Output is correct |
45 |
Correct |
63 ms |
120512 KB |
Output is correct |
46 |
Correct |
70 ms |
120472 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
28 ms |
108112 KB |
Output is correct |
2 |
Correct |
27 ms |
108092 KB |
Output is correct |
3 |
Correct |
26 ms |
108112 KB |
Output is correct |
4 |
Correct |
24 ms |
108052 KB |
Output is correct |
5 |
Correct |
27 ms |
108284 KB |
Output is correct |
6 |
Correct |
24 ms |
108112 KB |
Output is correct |
7 |
Correct |
25 ms |
108104 KB |
Output is correct |
8 |
Correct |
25 ms |
108112 KB |
Output is correct |
9 |
Correct |
22 ms |
108368 KB |
Output is correct |
10 |
Correct |
23 ms |
108476 KB |
Output is correct |
11 |
Correct |
20 ms |
108624 KB |
Output is correct |
12 |
Correct |
19 ms |
108516 KB |
Output is correct |
13 |
Correct |
18 ms |
108640 KB |
Output is correct |
14 |
Correct |
20 ms |
108640 KB |
Output is correct |
15 |
Correct |
19 ms |
108624 KB |
Output is correct |
16 |
Correct |
20 ms |
108892 KB |
Output is correct |
17 |
Correct |
27 ms |
110672 KB |
Output is correct |
18 |
Correct |
27 ms |
113744 KB |
Output is correct |
19 |
Correct |
29 ms |
114256 KB |
Output is correct |
20 |
Correct |
36 ms |
114512 KB |
Output is correct |
21 |
Correct |
20 ms |
109444 KB |
Output is correct |
22 |
Correct |
28 ms |
113744 KB |
Output is correct |
23 |
Correct |
28 ms |
113224 KB |
Output is correct |
24 |
Correct |
32 ms |
114256 KB |
Output is correct |
25 |
Correct |
30 ms |
114512 KB |
Output is correct |
26 |
Correct |
30 ms |
114508 KB |
Output is correct |
27 |
Correct |
33 ms |
114512 KB |
Output is correct |
28 |
Correct |
36 ms |
114504 KB |
Output is correct |
29 |
Correct |
48 ms |
114512 KB |
Output is correct |
30 |
Correct |
32 ms |
114256 KB |
Output is correct |
31 |
Correct |
38 ms |
114264 KB |
Output is correct |
32 |
Correct |
34 ms |
114512 KB |
Output is correct |
33 |
Correct |
47 ms |
115148 KB |
Output is correct |
34 |
Correct |
49 ms |
115016 KB |
Output is correct |
35 |
Correct |
49 ms |
114880 KB |
Output is correct |
36 |
Correct |
33 ms |
112004 KB |
Output is correct |
37 |
Correct |
67 ms |
117200 KB |
Output is correct |
38 |
Correct |
65 ms |
117456 KB |
Output is correct |
39 |
Correct |
67 ms |
117440 KB |
Output is correct |
40 |
Correct |
64 ms |
117448 KB |
Output is correct |
41 |
Correct |
63 ms |
117524 KB |
Output is correct |
42 |
Correct |
38 ms |
115148 KB |
Output is correct |
43 |
Correct |
39 ms |
115148 KB |
Output is correct |
44 |
Correct |
37 ms |
115032 KB |
Output is correct |
45 |
Correct |
64 ms |
120512 KB |
Output is correct |
46 |
Correct |
69 ms |
120396 KB |
Output is correct |
47 |
Correct |
215 ms |
153804 KB |
Output is correct |
48 |
Correct |
153 ms |
182572 KB |
Output is correct |
49 |
Correct |
159 ms |
189060 KB |
Output is correct |
50 |
Correct |
169 ms |
196480 KB |
Output is correct |
51 |
Correct |
268 ms |
205512 KB |
Output is correct |
52 |
Correct |
272 ms |
206016 KB |
Output is correct |
53 |
Correct |
217 ms |
202480 KB |
Output is correct |
54 |
Correct |
204 ms |
200776 KB |
Output is correct |
55 |
Correct |
212 ms |
200776 KB |
Output is correct |
56 |
Correct |
192 ms |
203336 KB |
Output is correct |
57 |
Correct |
367 ms |
202952 KB |
Output is correct |
58 |
Correct |
198 ms |
201704 KB |
Output is correct |
59 |
Correct |
196 ms |
201932 KB |
Output is correct |
60 |
Correct |
213 ms |
202444 KB |
Output is correct |
61 |
Correct |
199 ms |
202192 KB |
Output is correct |
62 |
Correct |
220 ms |
206492 KB |
Output is correct |
63 |
Correct |
252 ms |
232688 KB |
Output is correct |
64 |
Correct |
266 ms |
241156 KB |
Output is correct |
65 |
Correct |
288 ms |
252856 KB |
Output is correct |
66 |
Runtime error |
255 ms |
262144 KB |
Execution killed with signal 9 |
67 |
Halted |
0 ms |
0 KB |
- |