#include <bits/stdc++.h>
using namespace std;
const int MAXN = 3e4, INF = 2e9;
vector<array<int, 2>> g[MAXN*2];
signed main(){
cin.tie(0)->sync_with_stdio(0);
int n, m, b, p; cin >> n >> m;
int s, t;
for(int j=0; j<m; ++j){
cin >> b >> p;
if(j == 0) s = b;
if(j == 1) t = b;
if(p == 1){
g[b+b].push_back({b+b+p, 0});
}else{
for(int i=b%p; i<n; i+=p) g[b+b].push_back({i*2, abs(b-i)/p});
}
}
for(int i=0; i<n; ++i){
int u = i * 2;
g[u+1].push_back({u, 0});
if(i-1 >= 0) g[u+1].push_back({u-1, 1});
if(i+1 < n) g[u+1].push_back({u+3, 1});
}
priority_queue<array<int, 2>> q;
int d[n*2]; fill(d, d+n+n, INF);
q.push({d[s+s] = 0, s+s});
while(!q.empty()){
int u = q.top()[1], dist = -q.top()[0];
q.pop();
if(dist != d[u]) continue;
for(auto &[v, w] : g[u])
if(d[v] > dist + w) q.push({-(d[v] = dist + w), v});
}
if(d[t+t] == INF) d[t+t] = -1;
cout << d[t+t];
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:32:13: warning: 's' may be used uninitialized in this function [-Wmaybe-uninitialized]
32 | q.push({d[s+s] = 0, s+s});
| ~^~
skyscraper.cpp:42:8: warning: 't' may be used uninitialized in this function [-Wmaybe-uninitialized]
42 | if(d[t+t] == INF) d[t+t] = -1;
| ~^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1612 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1612 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 7 |
Correct |
2 ms |
1612 KB |
Output is correct |
| 8 |
Correct |
2 ms |
1612 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1740 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1712 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 17 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 25 |
Correct |
3 ms |
1868 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 28 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 29 |
Correct |
3 ms |
2508 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 31 |
Correct |
3 ms |
2124 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 33 |
Correct |
5 ms |
3136 KB |
Output is correct |
| 34 |
Correct |
5 ms |
3020 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1744 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 17 |
Correct |
3 ms |
2000 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 25 |
Correct |
3 ms |
1868 KB |
Output is correct |
| 26 |
Correct |
3 ms |
1868 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 28 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 29 |
Correct |
4 ms |
2508 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 31 |
Correct |
3 ms |
2124 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 33 |
Correct |
6 ms |
3020 KB |
Output is correct |
| 34 |
Correct |
5 ms |
3020 KB |
Output is correct |
| 35 |
Correct |
11 ms |
3340 KB |
Output is correct |
| 36 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 37 |
Correct |
12 ms |
4948 KB |
Output is correct |
| 38 |
Correct |
13 ms |
4492 KB |
Output is correct |
| 39 |
Correct |
15 ms |
4604 KB |
Output is correct |
| 40 |
Correct |
14 ms |
4504 KB |
Output is correct |
| 41 |
Correct |
14 ms |
4456 KB |
Output is correct |
| 42 |
Correct |
7 ms |
2204 KB |
Output is correct |
| 43 |
Correct |
7 ms |
2124 KB |
Output is correct |
| 44 |
Correct |
7 ms |
2036 KB |
Output is correct |
| 45 |
Correct |
16 ms |
6820 KB |
Output is correct |
| 46 |
Correct |
16 ms |
6872 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 17 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 23 |
Correct |
3 ms |
1868 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 25 |
Correct |
3 ms |
1868 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 28 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 29 |
Correct |
4 ms |
2508 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 31 |
Correct |
3 ms |
2124 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 33 |
Correct |
5 ms |
3020 KB |
Output is correct |
| 34 |
Correct |
5 ms |
3020 KB |
Output is correct |
| 35 |
Correct |
10 ms |
3404 KB |
Output is correct |
| 36 |
Correct |
3 ms |
1996 KB |
Output is correct |
| 37 |
Correct |
12 ms |
4940 KB |
Output is correct |
| 38 |
Correct |
14 ms |
4428 KB |
Output is correct |
| 39 |
Correct |
14 ms |
4556 KB |
Output is correct |
| 40 |
Correct |
14 ms |
4556 KB |
Output is correct |
| 41 |
Correct |
14 ms |
4464 KB |
Output is correct |
| 42 |
Correct |
7 ms |
2124 KB |
Output is correct |
| 43 |
Correct |
7 ms |
2160 KB |
Output is correct |
| 44 |
Correct |
7 ms |
2036 KB |
Output is correct |
| 45 |
Correct |
16 ms |
6860 KB |
Output is correct |
| 46 |
Correct |
17 ms |
6840 KB |
Output is correct |
| 47 |
Correct |
42 ms |
12712 KB |
Output is correct |
| 48 |
Correct |
18 ms |
5332 KB |
Output is correct |
| 49 |
Correct |
16 ms |
4816 KB |
Output is correct |
| 50 |
Correct |
13 ms |
4824 KB |
Output is correct |
| 51 |
Correct |
38 ms |
7360 KB |
Output is correct |
| 52 |
Correct |
47 ms |
7524 KB |
Output is correct |
| 53 |
Correct |
24 ms |
4580 KB |
Output is correct |
| 54 |
Correct |
9 ms |
3788 KB |
Output is correct |
| 55 |
Correct |
9 ms |
3812 KB |
Output is correct |
| 56 |
Correct |
15 ms |
4300 KB |
Output is correct |
| 57 |
Correct |
148 ms |
61160 KB |
Output is correct |
| 58 |
Correct |
14 ms |
4132 KB |
Output is correct |
| 59 |
Correct |
17 ms |
4760 KB |
Output is correct |
| 60 |
Correct |
18 ms |
5452 KB |
Output is correct |
| 61 |
Correct |
17 ms |
4628 KB |
Output is correct |
| 62 |
Correct |
32 ms |
8636 KB |
Output is correct |
| 63 |
Correct |
64 ms |
25900 KB |
Output is correct |
| 64 |
Correct |
77 ms |
34492 KB |
Output is correct |
| 65 |
Correct |
101 ms |
40652 KB |
Output is correct |
| 66 |
Correct |
161 ms |
72188 KB |
Output is correct |
| 67 |
Correct |
161 ms |
73184 KB |
Output is correct |
