#include<bits/stdc++.h>
#define int long long
#define ii pair<int,int>
#define F first
#define S second
using namespace std;
const int N=2e3+100;
vector<int> vec[N];
int vis[N][N];
int dis,st,n;
set<int> stt;
deque<ii> deq;
bool in(int x)
{
return 0<=x && x<n;
}
void fix(int v,int w)
{
if(in(v+w)&&vis[v+w][w]>vis[v][w]+1){
// cout<<5<<endl;
vis[v+w][w]=vis[v][w]+1;
deq.push_back({v+w,w});
}
if(in(v-w)&&vis[v-w][w]>vis[v][w]+1){
// cout<<5<<endl;
vis[v-w][w]=vis[v][w]+1;
deq.push_back({v-w,w});
}
}
int bfs()
{
deq.push_back({st,0});
while(deq.empty()==0){
int v=deq[0].F;
int w=deq[0].S;
deq.pop_front();
stt.insert(v);
if(v==dis)return vis[v][w];
fix(v,w);
// cout<<v<<" "<<w<<endl;
for(auto x:vec[v]){
vis[v][x]=min(vis[v][x],vis[v][w]);
fix(v,x);
// cout<<v<<" "<<x<<endl;
}
vec[v].clear();
}
return -1;
}
main()
{
int m;
cin>>n>>m;
for(int i=0;i<=n;i++){
for(int j=0;j<=n;j++){
vis[i][j]=1e18;
}
}
int x,y;
cin>>x>>y;
vis[x][0]=0;
vec[x].push_back(y);
st=x;
cin>>x>>y;
vec[x].push_back(y);
dis=x;
m-=2;
while(m--){
cin>>x>>y;
vec[x].push_back(y);
}
cout<<bfs()<<endl;
// for(auto x:stt)cout<<x<<" ";cout<<endl;
}
/*
5 3
0 2
1 1
4 1
*/
Compilation message
skyscraper.cpp:50:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
50 | main()
| ^~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
352 KB |
Output is correct |
6 |
Correct |
1 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
352 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
284 KB |
Output is correct |
6 |
Correct |
1 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
1 ms |
460 KB |
Output is correct |
9 |
Correct |
1 ms |
604 KB |
Output is correct |
10 |
Correct |
1 ms |
736 KB |
Output is correct |
11 |
Correct |
2 ms |
844 KB |
Output is correct |
12 |
Correct |
2 ms |
844 KB |
Output is correct |
13 |
Correct |
2 ms |
844 KB |
Output is correct |
14 |
Correct |
2 ms |
844 KB |
Output is correct |
15 |
Correct |
2 ms |
844 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
1 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
1 ms |
460 KB |
Output is correct |
9 |
Correct |
1 ms |
588 KB |
Output is correct |
10 |
Correct |
1 ms |
844 KB |
Output is correct |
11 |
Correct |
2 ms |
844 KB |
Output is correct |
12 |
Correct |
2 ms |
844 KB |
Output is correct |
13 |
Correct |
2 ms |
844 KB |
Output is correct |
14 |
Correct |
2 ms |
844 KB |
Output is correct |
15 |
Correct |
2 ms |
868 KB |
Output is correct |
16 |
Correct |
2 ms |
1484 KB |
Output is correct |
17 |
Correct |
6 ms |
7628 KB |
Output is correct |
18 |
Correct |
14 ms |
29100 KB |
Output is correct |
19 |
Correct |
16 ms |
33208 KB |
Output is correct |
20 |
Correct |
17 ms |
33356 KB |
Output is correct |
21 |
Correct |
3 ms |
3180 KB |
Output is correct |
22 |
Correct |
14 ms |
29644 KB |
Output is correct |
23 |
Correct |
13 ms |
26728 KB |
Output is correct |
24 |
Correct |
17 ms |
31692 KB |
Output is correct |
25 |
Correct |
18 ms |
33280 KB |
Output is correct |
26 |
Correct |
18 ms |
33268 KB |
Output is correct |
27 |
Correct |
17 ms |
33288 KB |
Output is correct |
28 |
Correct |
19 ms |
33344 KB |
Output is correct |
29 |
Correct |
22 ms |
33356 KB |
Output is correct |
30 |
Correct |
17 ms |
33252 KB |
Output is correct |
31 |
Correct |
19 ms |
33348 KB |
Output is correct |
32 |
Correct |
18 ms |
33364 KB |
Output is correct |
33 |
Correct |
30 ms |
33300 KB |
Output is correct |
34 |
Correct |
26 ms |
33388 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
1 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
1 ms |
476 KB |
Output is correct |
9 |
Correct |
1 ms |
588 KB |
Output is correct |
10 |
Correct |
1 ms |
844 KB |
Output is correct |
11 |
Correct |
2 ms |
844 KB |
Output is correct |
12 |
Correct |
2 ms |
844 KB |
Output is correct |
13 |
Correct |
2 ms |
844 KB |
Output is correct |
14 |
Correct |
2 ms |
872 KB |
Output is correct |
15 |
Correct |
2 ms |
872 KB |
Output is correct |
16 |
Correct |
2 ms |
1376 KB |
Output is correct |
17 |
Correct |
5 ms |
7628 KB |
Output is correct |
18 |
Correct |
14 ms |
29052 KB |
Output is correct |
19 |
Correct |
16 ms |
33228 KB |
Output is correct |
20 |
Correct |
17 ms |
33356 KB |
Output is correct |
21 |
Correct |
3 ms |
3148 KB |
Output is correct |
22 |
Correct |
14 ms |
29644 KB |
Output is correct |
23 |
Correct |
14 ms |
26684 KB |
Output is correct |
24 |
Correct |
17 ms |
31692 KB |
Output is correct |
25 |
Correct |
17 ms |
33224 KB |
Output is correct |
26 |
Correct |
17 ms |
33248 KB |
Output is correct |
27 |
Correct |
18 ms |
33292 KB |
Output is correct |
28 |
Correct |
20 ms |
33308 KB |
Output is correct |
29 |
Correct |
22 ms |
33324 KB |
Output is correct |
30 |
Correct |
17 ms |
33356 KB |
Output is correct |
31 |
Correct |
19 ms |
33356 KB |
Output is correct |
32 |
Correct |
20 ms |
33312 KB |
Output is correct |
33 |
Correct |
28 ms |
33356 KB |
Output is correct |
34 |
Correct |
23 ms |
33316 KB |
Output is correct |
35 |
Correct |
29 ms |
24672 KB |
Output is correct |
36 |
Correct |
11 ms |
14972 KB |
Output is correct |
37 |
Correct |
27 ms |
32836 KB |
Output is correct |
38 |
Correct |
35 ms |
34192 KB |
Output is correct |
39 |
Correct |
33 ms |
33820 KB |
Output is correct |
40 |
Correct |
32 ms |
33924 KB |
Output is correct |
41 |
Correct |
35 ms |
33976 KB |
Output is correct |
42 |
Correct |
29 ms |
33740 KB |
Output is correct |
43 |
Correct |
33 ms |
33848 KB |
Output is correct |
44 |
Correct |
30 ms |
33740 KB |
Output is correct |
45 |
Correct |
74 ms |
34320 KB |
Output is correct |
46 |
Correct |
50 ms |
34300 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
332 KB |
Output is correct |
2 |
Correct |
1 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
1 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
1 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
1 ms |
460 KB |
Output is correct |
9 |
Correct |
1 ms |
588 KB |
Output is correct |
10 |
Correct |
1 ms |
844 KB |
Output is correct |
11 |
Correct |
2 ms |
844 KB |
Output is correct |
12 |
Correct |
2 ms |
844 KB |
Output is correct |
13 |
Correct |
2 ms |
844 KB |
Output is correct |
14 |
Correct |
2 ms |
844 KB |
Output is correct |
15 |
Correct |
2 ms |
844 KB |
Output is correct |
16 |
Correct |
2 ms |
1484 KB |
Output is correct |
17 |
Correct |
5 ms |
7628 KB |
Output is correct |
18 |
Correct |
15 ms |
29064 KB |
Output is correct |
19 |
Correct |
16 ms |
33228 KB |
Output is correct |
20 |
Correct |
18 ms |
33384 KB |
Output is correct |
21 |
Correct |
3 ms |
3148 KB |
Output is correct |
22 |
Correct |
14 ms |
29644 KB |
Output is correct |
23 |
Correct |
13 ms |
26744 KB |
Output is correct |
24 |
Correct |
17 ms |
31692 KB |
Output is correct |
25 |
Correct |
17 ms |
33256 KB |
Output is correct |
26 |
Correct |
17 ms |
33260 KB |
Output is correct |
27 |
Correct |
17 ms |
33352 KB |
Output is correct |
28 |
Correct |
19 ms |
33376 KB |
Output is correct |
29 |
Correct |
21 ms |
33356 KB |
Output is correct |
30 |
Correct |
19 ms |
33228 KB |
Output is correct |
31 |
Correct |
19 ms |
33356 KB |
Output is correct |
32 |
Correct |
18 ms |
33236 KB |
Output is correct |
33 |
Correct |
28 ms |
33336 KB |
Output is correct |
34 |
Correct |
26 ms |
33292 KB |
Output is correct |
35 |
Correct |
30 ms |
24644 KB |
Output is correct |
36 |
Correct |
10 ms |
14924 KB |
Output is correct |
37 |
Correct |
27 ms |
32908 KB |
Output is correct |
38 |
Correct |
35 ms |
34232 KB |
Output is correct |
39 |
Correct |
32 ms |
33844 KB |
Output is correct |
40 |
Correct |
32 ms |
33940 KB |
Output is correct |
41 |
Correct |
38 ms |
33996 KB |
Output is correct |
42 |
Correct |
30 ms |
33748 KB |
Output is correct |
43 |
Correct |
29 ms |
33800 KB |
Output is correct |
44 |
Correct |
32 ms |
33768 KB |
Output is correct |
45 |
Correct |
75 ms |
34376 KB |
Output is correct |
46 |
Correct |
52 ms |
34316 KB |
Output is correct |
47 |
Runtime error |
63 ms |
70504 KB |
Execution killed with signal 11 |
48 |
Halted |
0 ms |
0 KB |
- |