#include<bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
int N, M, B[30005], P[30005];
int mindis[30005];
set<int> dog[30005];
int main() {
ios_base::sync_with_stdio(false); cin.tie(NULL);
cin>>N>>M;
for(int i=0;i<M;i++) {
cin>>B[i]>>P[i];
dog[B[i]].insert(-P[i]);
}
for(int i=0;i<N;i++) {
mindis[i] = 2e9;
}
priority_queue<pii, vector<pii>, greater<pii>> pq;
pq.push({0, B[0]});
mindis[B[0]] = 0;
while(!pq.empty()) {
auto [dis, u] = pq.top();
pq.pop();
if(mindis[u]!=dis) continue;
for(int pp:dog[u]) {
int p = -pp;
int v = u+p;
int w = 1;
while(v<N) {
if(mindis[v]>dis+w){
mindis[v] = dis+w;
pq.push({mindis[v], v});
}
v += p;
w++;
}
v = u-p;
w = 1;
while(v>=0) {
if(mindis[v]>dis+w) {
mindis[v] = dis+w;
pq.push({mindis[v], v});
}
v -= p;
w++;
}
}
}
if(mindis[B[1]]==2e9) cout<<-1;
else cout<<mindis[B[1]];
}
/*
5 3
0 2
1 1
4 1
*/
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1876 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1624 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 2 |
Correct |
4 ms |
1628 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 7 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 14 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1880 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 14 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 17 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1712 KB |
Output is correct |
| 20 |
Correct |
5 ms |
1884 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 23 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1880 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 27 |
Correct |
1 ms |
1888 KB |
Output is correct |
| 28 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1880 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 31 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 32 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 33 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 34 |
Correct |
2 ms |
1884 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 14 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 17 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1884 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 23 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 25 |
Correct |
3 ms |
1884 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 28 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 29 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 30 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 31 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 32 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 33 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 34 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 35 |
Correct |
8 ms |
3420 KB |
Output is correct |
| 36 |
Correct |
2 ms |
2136 KB |
Output is correct |
| 37 |
Correct |
6 ms |
3164 KB |
Output is correct |
| 38 |
Correct |
9 ms |
3676 KB |
Output is correct |
| 39 |
Correct |
9 ms |
3676 KB |
Output is correct |
| 40 |
Correct |
10 ms |
3676 KB |
Output is correct |
| 41 |
Correct |
9 ms |
3696 KB |
Output is correct |
| 42 |
Correct |
4 ms |
2140 KB |
Output is correct |
| 43 |
Correct |
4 ms |
2140 KB |
Output is correct |
| 44 |
Correct |
6 ms |
2392 KB |
Output is correct |
| 45 |
Correct |
10 ms |
3672 KB |
Output is correct |
| 46 |
Correct |
10 ms |
3676 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1624 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1628 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 11 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1872 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 15 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 17 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 20 |
Correct |
3 ms |
2048 KB |
Output is correct |
| 21 |
Correct |
1 ms |
1888 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 23 |
Correct |
1 ms |
2132 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1884 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 27 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 28 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 29 |
Correct |
2 ms |
2060 KB |
Output is correct |
| 30 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 31 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 32 |
Correct |
1 ms |
1880 KB |
Output is correct |
| 33 |
Correct |
2 ms |
1948 KB |
Output is correct |
| 34 |
Correct |
2 ms |
2132 KB |
Output is correct |
| 35 |
Correct |
8 ms |
3420 KB |
Output is correct |
| 36 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 37 |
Correct |
6 ms |
3164 KB |
Output is correct |
| 38 |
Correct |
10 ms |
3676 KB |
Output is correct |
| 39 |
Correct |
12 ms |
3844 KB |
Output is correct |
| 40 |
Correct |
10 ms |
3672 KB |
Output is correct |
| 41 |
Correct |
10 ms |
3676 KB |
Output is correct |
| 42 |
Correct |
4 ms |
2296 KB |
Output is correct |
| 43 |
Correct |
4 ms |
2140 KB |
Output is correct |
| 44 |
Correct |
6 ms |
2396 KB |
Output is correct |
| 45 |
Correct |
10 ms |
3676 KB |
Output is correct |
| 46 |
Correct |
10 ms |
3676 KB |
Output is correct |
| 47 |
Correct |
14 ms |
4056 KB |
Output is correct |
| 48 |
Correct |
6 ms |
3420 KB |
Output is correct |
| 49 |
Correct |
5 ms |
3348 KB |
Output is correct |
| 50 |
Correct |
4 ms |
2908 KB |
Output is correct |
| 51 |
Correct |
20 ms |
5076 KB |
Output is correct |
| 52 |
Correct |
22 ms |
4568 KB |
Output is correct |
| 53 |
Correct |
12 ms |
4568 KB |
Output is correct |
| 54 |
Correct |
2 ms |
2140 KB |
Output is correct |
| 55 |
Correct |
3 ms |
2140 KB |
Output is correct |
| 56 |
Correct |
343 ms |
4188 KB |
Output is correct |
| 57 |
Correct |
35 ms |
4304 KB |
Output is correct |
| 58 |
Correct |
6 ms |
2392 KB |
Output is correct |
| 59 |
Correct |
6 ms |
2492 KB |
Output is correct |
| 60 |
Correct |
6 ms |
2472 KB |
Output is correct |
| 61 |
Correct |
7 ms |
2652 KB |
Output is correct |
| 62 |
Correct |
7 ms |
3932 KB |
Output is correct |
| 63 |
Correct |
28 ms |
5072 KB |
Output is correct |
| 64 |
Correct |
27 ms |
4820 KB |
Output is correct |
| 65 |
Correct |
30 ms |
5840 KB |
Output is correct |
| 66 |
Correct |
41 ms |
6096 KB |
Output is correct |
| 67 |
Correct |
37 ms |
5836 KB |
Output is correct |
