#include<bits/stdc++.h>
using namespace std;
using pii=pair <int,int>;
int vis[30303];
int N,M;
pair <int,int> ipt[30303];
vector <int> V[30303];
priority_queue<pii,vector<pii>,greater<pii> > pq;
void dijkstra(){
pq.push({0,ipt[0].first});
vis[ipt[0].first]=0;
while(!pq.empty()){
int a=pq.top().first,b=pq.top().second;
pq.pop();
if(a<=vis[b]){
for(auto i:V[b]){
for(int k=1;b+i*k<N;k++){
if(vis[b+i*k]>a+k){
pq.push({a+k,b+i*k});
vis[b+i*k]=a+k;
}
auto it=lower_bound(V[b+i*k].begin(),V[b+i*k].end(),i);
if(it!=V[b+i*k].end()&&*it==i)break;
}
for(int k=1;b-i*k>=0;k++){
if(vis[b-i*k]>a+k){
pq.push({a+k,b-i*k});
vis[b-i*k]=a+k;
}
auto it=lower_bound(V[b-i*k].begin(),V[b-i*k].end(),i);
if(it!=V[b-i*k].end()&&*it==i)break;
}
}
}
}
}
int main(){
fill(vis,vis+30303,1010101010);
scanf("%d%d",&N,&M);
for(int i=0;i<M;i++){
scanf("%d%d",&ipt[i].first,&ipt[i].second);
V[ipt[i].first].push_back(ipt[i].second);
}
for(int i=0;i<30003;i++){
sort(V[i].begin(),V[i].end());
V[i].erase(unique(V[i].begin(),V[i].end()),V[i].end());
}
dijkstra();
if(vis[ipt[1].first]!=1010101010)printf("%d",vis[ipt[1].first]);
else puts("-1");
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:40:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&N,&M);
~~~~~^~~~~~~~~~~~~~
skyscraper.cpp:42:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&ipt[i].first,&ipt[i].second);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1144 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
1116 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1204 KB |
Output is correct |
| 12 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 13 |
Correct |
3 ms |
1148 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1144 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1148 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 12 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 13 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 16 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 17 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 18 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 19 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1272 KB |
Output is correct |
| 21 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 22 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 23 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 24 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 25 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 26 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 27 |
Correct |
3 ms |
1272 KB |
Output is correct |
| 28 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 29 |
Correct |
5 ms |
1400 KB |
Output is correct |
| 30 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 31 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 32 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 33 |
Correct |
7 ms |
1528 KB |
Output is correct |
| 34 |
Correct |
7 ms |
1528 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1148 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 12 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 13 |
Correct |
3 ms |
1148 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 16 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 17 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 18 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 19 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1272 KB |
Output is correct |
| 21 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 22 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 23 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 24 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 25 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 26 |
Correct |
3 ms |
1272 KB |
Output is correct |
| 27 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 28 |
Correct |
3 ms |
1272 KB |
Output is correct |
| 29 |
Correct |
5 ms |
1400 KB |
Output is correct |
| 30 |
Correct |
3 ms |
1272 KB |
Output is correct |
| 31 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 32 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 33 |
Correct |
7 ms |
1656 KB |
Output is correct |
| 34 |
Correct |
7 ms |
1656 KB |
Output is correct |
| 35 |
Correct |
13 ms |
1656 KB |
Output is correct |
| 36 |
Correct |
5 ms |
1272 KB |
Output is correct |
| 37 |
Correct |
13 ms |
1528 KB |
Output is correct |
| 38 |
Correct |
16 ms |
1656 KB |
Output is correct |
| 39 |
Correct |
16 ms |
1656 KB |
Output is correct |
| 40 |
Correct |
17 ms |
1784 KB |
Output is correct |
| 41 |
Correct |
17 ms |
1916 KB |
Output is correct |
| 42 |
Correct |
9 ms |
1656 KB |
Output is correct |
| 43 |
Correct |
9 ms |
1656 KB |
Output is correct |
| 44 |
Correct |
9 ms |
1656 KB |
Output is correct |
| 45 |
Correct |
15 ms |
1912 KB |
Output is correct |
| 46 |
Correct |
16 ms |
1912 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1144 KB |
Output is correct |
| 4 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 5 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 6 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 7 |
Correct |
3 ms |
1148 KB |
Output is correct |
| 8 |
Correct |
3 ms |
1148 KB |
Output is correct |
| 9 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 10 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 12 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 13 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 16 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 17 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 18 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 19 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 20 |
Correct |
3 ms |
1272 KB |
Output is correct |
| 21 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 22 |
Correct |
3 ms |
1272 KB |
Output is correct |
| 23 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 24 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 25 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 26 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 27 |
Correct |
3 ms |
1144 KB |
Output is correct |
| 28 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 29 |
Correct |
5 ms |
1372 KB |
Output is correct |
| 30 |
Correct |
4 ms |
1400 KB |
Output is correct |
| 31 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 32 |
Correct |
4 ms |
1272 KB |
Output is correct |
| 33 |
Correct |
7 ms |
1656 KB |
Output is correct |
| 34 |
Correct |
7 ms |
1528 KB |
Output is correct |
| 35 |
Correct |
13 ms |
1528 KB |
Output is correct |
| 36 |
Correct |
5 ms |
1272 KB |
Output is correct |
| 37 |
Correct |
13 ms |
1528 KB |
Output is correct |
| 38 |
Correct |
16 ms |
1728 KB |
Output is correct |
| 39 |
Correct |
16 ms |
1656 KB |
Output is correct |
| 40 |
Correct |
16 ms |
1756 KB |
Output is correct |
| 41 |
Correct |
16 ms |
1788 KB |
Output is correct |
| 42 |
Correct |
9 ms |
1656 KB |
Output is correct |
| 43 |
Correct |
9 ms |
1656 KB |
Output is correct |
| 44 |
Correct |
9 ms |
1656 KB |
Output is correct |
| 45 |
Correct |
15 ms |
1912 KB |
Output is correct |
| 46 |
Correct |
15 ms |
1912 KB |
Output is correct |
| 47 |
Correct |
35 ms |
2296 KB |
Output is correct |
| 48 |
Correct |
11 ms |
1784 KB |
Output is correct |
| 49 |
Correct |
11 ms |
1784 KB |
Output is correct |
| 50 |
Correct |
8 ms |
1656 KB |
Output is correct |
| 51 |
Correct |
38 ms |
2680 KB |
Output is correct |
| 52 |
Correct |
40 ms |
2680 KB |
Output is correct |
| 53 |
Correct |
23 ms |
2552 KB |
Output is correct |
| 54 |
Correct |
5 ms |
1400 KB |
Output is correct |
| 55 |
Correct |
5 ms |
1400 KB |
Output is correct |
| 56 |
Correct |
14 ms |
2296 KB |
Output is correct |
| 57 |
Correct |
30 ms |
1908 KB |
Output is correct |
| 58 |
Correct |
11 ms |
1784 KB |
Output is correct |
| 59 |
Correct |
12 ms |
1784 KB |
Output is correct |
| 60 |
Correct |
13 ms |
1784 KB |
Output is correct |
| 61 |
Correct |
13 ms |
1784 KB |
Output is correct |
| 62 |
Correct |
19 ms |
2296 KB |
Output is correct |
| 63 |
Correct |
51 ms |
3824 KB |
Output is correct |
| 64 |
Correct |
61 ms |
3824 KB |
Output is correct |
| 65 |
Correct |
67 ms |
3816 KB |
Output is correct |
| 66 |
Correct |
136 ms |
5732 KB |
Output is correct |
| 67 |
Correct |
137 ms |
5732 KB |
Output is correct |
