#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
int main() {
int n, m;
cin >> n >> m;
vector<int> mp[n+1], B(n+1), P(n+1);
for(int i=0; i<m; i++) {
cin >> B[i] >> P[i];
mp[++B[i]].push_back(P[i]);
}
priority_queue<pii, vector<pii>, greater<pii> > pq;
vector<bool> vis(n+1); vector<int> dist(n+1, 1e9);
dist[B[0]] = 0;
pq.push({ 0, B[0] });
while(!pq.empty()) {
auto [d, u] = pq.top();
pq.pop();
if(vis[u]) continue;
vis[u] = 1;
for(int &j : mp[u]) {
int v = u + j;
while(v <= n) {
if(dist[v] > dist[u] + (v - u) / j) {
dist[v] = dist[u] + (v - u) / j;
pq.push({ dist[v], v });
}
v += j;
}
v = u - j;
while(v >= 1) {
if(dist[v] > dist[u] + (u - v) / j) {
dist[v] = dist[u] + (u - v) / j;
pq.push({ dist[v], v });
}
v -= j;
}
}
}
cout << (dist[B[1]] == 1e9 ? -1 : dist[B[1]]) << '\n';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
436 KB |
Output is correct |
3 |
Correct |
1 ms |
436 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
436 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
436 KB |
Output is correct |
2 |
Correct |
1 ms |
440 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
1 ms |
348 KB |
Output is correct |
10 |
Runtime error |
1 ms |
348 KB |
Execution killed with signal 6 |
11 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
504 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
432 KB |
Output is correct |
10 |
Runtime error |
1 ms |
348 KB |
Execution killed with signal 6 |
11 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
1 ms |
348 KB |
Output is correct |
10 |
Runtime error |
1 ms |
348 KB |
Execution killed with signal 6 |
11 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
500 KB |
Output is correct |
4 |
Correct |
0 ms |
440 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
604 KB |
Output is correct |
10 |
Runtime error |
1 ms |
348 KB |
Execution killed with signal 6 |
11 |
Halted |
0 ms |
0 KB |
- |