#include <bits/stdc++.h>
#define startt ios_base::sync_with_stdio(false);cin.tie(0);
typedef long long ll;
using namespace std;
#define vint vector<int>
#define all(v) v.begin(), v.end()
#define MOD 1000000007
#define MOD2 998244353
#define MX 1000000000
#define MXL 1000000000000000000
#define PI (ld)2*acos(0.0)
#define pb push_back
#define sc second
#define fr first
//#define int long long
#define endl '\n'
#define ld long double
#define NO cout << "NO" << endl
#define YES cout << "YES" << endl
int ceildiv(int one, int two) {if (one % two == 0) {return one / two;}else {return one / two + 1;}} int power(int n, int pow, int m) {if (pow == 0) return 1;if (pow % 2 == 0) {ll x = power(n, pow / 2, m);return (x * x) % m;}else return (power(n, pow - 1, m) * n) % m;} int gcd(int a, int b) { if (!b)return a; return gcd(b, a % b);} int factorial(int n, int mod) {if (n > 1)return (n * factorial(n - 1, mod)) % mod; else return 1;} int lcm(int a, int b) {return (a * b) / gcd(a, b);} vector<int> read(int n) {vector<int> a; for (int i = 0; i < n; i++) { int x; cin >> x; a.pb(x);} return a;}struct prefix_sum{vint pref;void build(vint a){pref.pb(0);for(int i = 0; i < a.size(); i++){pref.pb(pref.back()+a[i]);}}int get(int l, int r){return pref[r+1]-pref[l];}};//mesanu
int mp[35000][500];
vector<vector<pair<int, int>>> adj;
void cnn(int first, int second)
{
vector<pair<int, int>> a;
mp[first][second] = adj.size();
adj.pb(a);
}
int dijkstra(int s, int e)
{
int n = adj.size();
vector<int> d(n, MX);
d[s] = 0;
set<pair<int, int>> q;
q.insert({0, s});
while (!q.empty()) {
int v = q.begin()->second;
q.erase(q.begin());
for (auto edge : adj[v]) {
int to = edge.first;
int len = edge.second;
if (d[v] + len < d[to]) {
q.erase({d[to], to});
d[to] = d[v] + len;
q.insert({d[to], to});
}
}
}
return d[e];
}
void solve()
{
int n, m;
cin >> n >> m;
int start = -1;
int end = -1;
int th = sqrt(n);
vector<pair<int, int>> ph;
adj.pb(ph);
for(int i = 0; i < n; i++)
{
cnn(i, 0);
}
for(int sky = 0; sky < n; sky++)
{
for(int power = 1; power <= th; power++)
{
cnn(sky, power);
}
}
for(int sky = 0; sky < n; sky++)
{
for(int power = 1; power <= th; power++)
{
adj[mp[sky][power]].pb({mp[sky][0], 0});
if(sky-power >= 0)
{
adj[mp[sky][power]].pb({mp[sky-power][power], 1});
}
if(sky+power < n)
{
adj[mp[sky][power]].pb({mp[sky+power][power], 1});
}
}
}
for(int i = 0; i < m; i++)
{
int sky, power;
cin >> sky >> power;
if(i == 0)
{
start = sky;
}
if(i == 1)
{
end = sky;
}
if(power <= th)
{
adj[mp[sky][0]].pb({mp[sky][power], 0});
}
else
{
for(int j = sky%power; j < n; j+=power)
{
adj[mp[sky][0]].pb({mp[j][0], abs(sky-j)/power});
}
}
}
int dist = dijkstra(mp[start][0], mp[end][0]);
if(dist == MX)
{
cout << -1 << endl;
}
else
{
cout << dist << endl;
}
}
int32_t main(){
startt
int t = 1;
//cin >> t;
while (t--) {
solve();
}
}
/*
5 3
0 2
1 1
4 1
*/
Compilation message
skyscraper.cpp: In member function 'void prefix_sum::build(std::vector<int>)':
skyscraper.cpp:20:667: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
20 | int ceildiv(int one, int two) {if (one % two == 0) {return one / two;}else {return one / two + 1;}} int power(int n, int pow, int m) {if (pow == 0) return 1;if (pow % 2 == 0) {ll x = power(n, pow / 2, m);return (x * x) % m;}else return (power(n, pow - 1, m) * n) % m;} int gcd(int a, int b) { if (!b)return a; return gcd(b, a % b);} int factorial(int n, int mod) {if (n > 1)return (n * factorial(n - 1, mod)) % mod; else return 1;} int lcm(int a, int b) {return (a * b) / gcd(a, b);} vector<int> read(int n) {vector<int> a; for (int i = 0; i < n; i++) { int x; cin >> x; a.pb(x);} return a;}struct prefix_sum{vint pref;void build(vint a){pref.pb(0);for(int i = 0; i < a.size(); i++){pref.pb(pref.back()+a[i]);}}int get(int l, int r){return pref[r+1]-pref[l];}};//mesanu
| ~~^~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
340 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 |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
340 KB |
Output is correct |
5 |
Correct |
1 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 |
0 ms |
340 KB |
Output is correct |
9 |
Correct |
1 ms |
468 KB |
Output is correct |
10 |
Correct |
1 ms |
596 KB |
Output is correct |
11 |
Correct |
1 ms |
596 KB |
Output is correct |
12 |
Correct |
1 ms |
596 KB |
Output is correct |
13 |
Correct |
1 ms |
596 KB |
Output is correct |
14 |
Correct |
1 ms |
596 KB |
Output is correct |
15 |
Correct |
1 ms |
596 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 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 |
1 ms |
468 KB |
Output is correct |
10 |
Correct |
1 ms |
596 KB |
Output is correct |
11 |
Correct |
2 ms |
596 KB |
Output is correct |
12 |
Correct |
1 ms |
552 KB |
Output is correct |
13 |
Correct |
1 ms |
596 KB |
Output is correct |
14 |
Correct |
1 ms |
596 KB |
Output is correct |
15 |
Correct |
1 ms |
596 KB |
Output is correct |
16 |
Correct |
1 ms |
852 KB |
Output is correct |
17 |
Correct |
8 ms |
3384 KB |
Output is correct |
18 |
Correct |
12 ms |
9072 KB |
Output is correct |
19 |
Correct |
14 ms |
10820 KB |
Output is correct |
20 |
Correct |
14 ms |
10832 KB |
Output is correct |
21 |
Correct |
2 ms |
1684 KB |
Output is correct |
22 |
Correct |
12 ms |
9372 KB |
Output is correct |
23 |
Correct |
11 ms |
8136 KB |
Output is correct |
24 |
Correct |
15 ms |
10260 KB |
Output is correct |
25 |
Correct |
14 ms |
10820 KB |
Output is correct |
26 |
Correct |
14 ms |
10820 KB |
Output is correct |
27 |
Correct |
13 ms |
10768 KB |
Output is correct |
28 |
Correct |
15 ms |
10856 KB |
Output is correct |
29 |
Correct |
24 ms |
10820 KB |
Output is correct |
30 |
Correct |
16 ms |
10808 KB |
Output is correct |
31 |
Correct |
19 ms |
10796 KB |
Output is correct |
32 |
Correct |
18 ms |
11040 KB |
Output is correct |
33 |
Correct |
29 ms |
11332 KB |
Output is correct |
34 |
Correct |
27 ms |
11332 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
340 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 |
0 ms |
340 KB |
Output is correct |
9 |
Correct |
1 ms |
468 KB |
Output is correct |
10 |
Correct |
1 ms |
596 KB |
Output is correct |
11 |
Correct |
1 ms |
596 KB |
Output is correct |
12 |
Correct |
1 ms |
596 KB |
Output is correct |
13 |
Correct |
1 ms |
596 KB |
Output is correct |
14 |
Correct |
1 ms |
596 KB |
Output is correct |
15 |
Correct |
1 ms |
596 KB |
Output is correct |
16 |
Correct |
1 ms |
972 KB |
Output is correct |
17 |
Correct |
5 ms |
3404 KB |
Output is correct |
18 |
Correct |
11 ms |
9156 KB |
Output is correct |
19 |
Correct |
13 ms |
10840 KB |
Output is correct |
20 |
Correct |
15 ms |
10820 KB |
Output is correct |
21 |
Correct |
2 ms |
1684 KB |
Output is correct |
22 |
Correct |
12 ms |
9340 KB |
Output is correct |
23 |
Correct |
10 ms |
8136 KB |
Output is correct |
24 |
Correct |
15 ms |
10180 KB |
Output is correct |
25 |
Correct |
14 ms |
10820 KB |
Output is correct |
26 |
Correct |
14 ms |
10812 KB |
Output is correct |
27 |
Correct |
17 ms |
10852 KB |
Output is correct |
28 |
Correct |
16 ms |
10948 KB |
Output is correct |
29 |
Correct |
29 ms |
10784 KB |
Output is correct |
30 |
Correct |
19 ms |
10820 KB |
Output is correct |
31 |
Correct |
21 ms |
10832 KB |
Output is correct |
32 |
Correct |
16 ms |
10948 KB |
Output is correct |
33 |
Correct |
30 ms |
11292 KB |
Output is correct |
34 |
Correct |
28 ms |
11300 KB |
Output is correct |
35 |
Correct |
21 ms |
8064 KB |
Output is correct |
36 |
Correct |
8 ms |
5324 KB |
Output is correct |
37 |
Correct |
40 ms |
12024 KB |
Output is correct |
38 |
Correct |
37 ms |
12240 KB |
Output is correct |
39 |
Correct |
40 ms |
12276 KB |
Output is correct |
40 |
Correct |
34 ms |
12288 KB |
Output is correct |
41 |
Correct |
46 ms |
12264 KB |
Output is correct |
42 |
Correct |
19 ms |
11260 KB |
Output is correct |
43 |
Correct |
22 ms |
11264 KB |
Output is correct |
44 |
Correct |
17 ms |
11204 KB |
Output is correct |
45 |
Correct |
38 ms |
15192 KB |
Output is correct |
46 |
Correct |
41 ms |
15136 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
256 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
340 KB |
Output is correct |
5 |
Correct |
1 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 |
1 ms |
468 KB |
Output is correct |
10 |
Correct |
1 ms |
596 KB |
Output is correct |
11 |
Correct |
1 ms |
596 KB |
Output is correct |
12 |
Correct |
1 ms |
596 KB |
Output is correct |
13 |
Correct |
1 ms |
596 KB |
Output is correct |
14 |
Correct |
1 ms |
596 KB |
Output is correct |
15 |
Correct |
1 ms |
596 KB |
Output is correct |
16 |
Correct |
1 ms |
852 KB |
Output is correct |
17 |
Correct |
5 ms |
3404 KB |
Output is correct |
18 |
Correct |
11 ms |
9156 KB |
Output is correct |
19 |
Correct |
13 ms |
10820 KB |
Output is correct |
20 |
Correct |
14 ms |
10872 KB |
Output is correct |
21 |
Correct |
2 ms |
1684 KB |
Output is correct |
22 |
Correct |
12 ms |
9412 KB |
Output is correct |
23 |
Correct |
11 ms |
8152 KB |
Output is correct |
24 |
Correct |
14 ms |
10180 KB |
Output is correct |
25 |
Correct |
15 ms |
10820 KB |
Output is correct |
26 |
Correct |
14 ms |
10836 KB |
Output is correct |
27 |
Correct |
14 ms |
10820 KB |
Output is correct |
28 |
Correct |
15 ms |
10880 KB |
Output is correct |
29 |
Correct |
24 ms |
10820 KB |
Output is correct |
30 |
Correct |
17 ms |
10820 KB |
Output is correct |
31 |
Correct |
19 ms |
10848 KB |
Output is correct |
32 |
Correct |
17 ms |
10948 KB |
Output is correct |
33 |
Correct |
30 ms |
11304 KB |
Output is correct |
34 |
Correct |
30 ms |
11308 KB |
Output is correct |
35 |
Correct |
25 ms |
8040 KB |
Output is correct |
36 |
Correct |
9 ms |
5320 KB |
Output is correct |
37 |
Correct |
35 ms |
12064 KB |
Output is correct |
38 |
Correct |
35 ms |
12184 KB |
Output is correct |
39 |
Correct |
36 ms |
12216 KB |
Output is correct |
40 |
Correct |
41 ms |
12236 KB |
Output is correct |
41 |
Correct |
36 ms |
12228 KB |
Output is correct |
42 |
Correct |
18 ms |
11240 KB |
Output is correct |
43 |
Correct |
17 ms |
11232 KB |
Output is correct |
44 |
Correct |
17 ms |
11248 KB |
Output is correct |
45 |
Correct |
40 ms |
15264 KB |
Output is correct |
46 |
Correct |
40 ms |
15036 KB |
Output is correct |
47 |
Correct |
347 ms |
131404 KB |
Output is correct |
48 |
Runtime error |
346 ms |
262144 KB |
Execution killed with signal 9 |
49 |
Halted |
0 ms |
0 KB |
- |