#include <bits/stdc++.h>
/*#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/detail/standard_policies.hpp>*/
#define pb push_back
#define mp make_pair
#define sz(s) ((int)(s.size()))
#define all(s) s.begin(), s.end()
#define rep(i, a, n) for (int i = a; i <= n; ++i)
#define per(i, n, a) for (int i = n; i >= a; --i)
#define onlycin ios_base::sync_with_stdio(false); cin.tie(0)
#define F first
#define S second
using namespace std;
// using namespace __gnu_pbds;
typedef long long ll;
typedef unsigned long long ull;
/*typedef tree<
pair < int, int >,
null_type,
less< pair < int, int > >,
rb_tree_tag,
tree_order_statistics_node_update>
ordered_set;*/
// find_by_order() order_of_key()
const int MAXN = (int)5e5+228;
const char nxtl = '\n';
const int mod = (int)1e9+7;
const double eps = (double)1e-7;
template<typename T> inline bool updmin(T &a, const T &b) {return a > b ? a = b, 1 : 0;}
template<typename T> inline bool updmax(T &a, const T &b) {return a < b ? a = b, 1 : 0;}
int n, m, b[MAXN], p[MAXN], d[2020];
vector < pair < int, int > > g[2020];
vector < int > divs[2020], have[2020];
int main() {
#ifdef accepted
freopen(".in", "r", stdin);
freopen(".out", "w", stdout);
#endif
onlycin;
cin >> n >> m;
rep(i, 1, m) {
cin >> b[i] >> p[i];
have[++b[i]].pb(p[i]);
}
rep(i, 1, n) {
sort(all(have[i])); have[i].resize(unique(all(have[i]))-have[i].begin());
}
rep(i, 1, n) {
for(int j = i; j <= n; j += i) divs[j].pb(i);
}
rep(i, 1, n) {
rep(j, 1, n) {
if(i == j) continue;
int cost = 202020;
for(auto &to : divs[abs(i-j)]) {
if(binary_search(all(have[i]), to)) updmin(cost, abs(i-j)/to);
}
if(cost < 202020) g[i].pb(mp(j, cost));
}
}
memset(d, 0x3f, sizeof d);
d[b[1]] = 0;
set < pair < int, int > > S; S.insert(mp(0, b[1]));
while(!S.empty()) {
int v = S.begin()->second;
S.erase(S.begin());
for(auto &it : g[v]) {
int cost = it.S, to = it.F;
if(d[to] > d[v]+cost) {
S.erase(mp(d[to], to));
d[to] = d[v]+cost;
S.insert(mp(d[to], to));
}
}
}
cout << d[b[2]] << nxtl;
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
508 KB |
Output is correct |
| 2 |
Correct |
2 ms |
508 KB |
Output is correct |
| 3 |
Correct |
2 ms |
552 KB |
Output is correct |
| 4 |
Incorrect |
2 ms |
588 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
788 KB |
Output is correct |
| 2 |
Correct |
2 ms |
788 KB |
Output is correct |
| 3 |
Correct |
2 ms |
788 KB |
Output is correct |
| 4 |
Incorrect |
2 ms |
788 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
788 KB |
Output is correct |
| 2 |
Correct |
2 ms |
788 KB |
Output is correct |
| 3 |
Correct |
2 ms |
788 KB |
Output is correct |
| 4 |
Incorrect |
2 ms |
788 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
788 KB |
Output is correct |
| 2 |
Correct |
2 ms |
788 KB |
Output is correct |
| 3 |
Correct |
2 ms |
788 KB |
Output is correct |
| 4 |
Incorrect |
2 ms |
788 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
788 KB |
Output is correct |
| 2 |
Correct |
2 ms |
788 KB |
Output is correct |
| 3 |
Correct |
2 ms |
788 KB |
Output is correct |
| 4 |
Incorrect |
2 ms |
788 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
