#include<stdio.h>
#include<math.h>
#include<queue>
#include<vector>
#include<algorithm>
#include<map>
using namespace std;
bool ch[30010][175];
vector<int>con[30010];
typedef pair<int,int> ppair;
struct data{
int val,x,y,c;
bool operator<(const data&r)const{
return val>r.val;
}
}b;
data q[30010*175];
data imsi[30010*175];
int sw,n,m,root,s,pos,f=-1,r=0;
struct data2{
int x,p;
}a[30010];
int main()
{
int sw2,i,j,val,x,y,c,w=0;
scanf("%d %d",&n,&m);
root=sqrt(n);
for(i=0;i<m;i++){scanf("%d %d",&a[i].x,&a[i].p); con[a[i].x].push_back(a[i].p);}
b.val=0, b.x=a[0].x, b.y=a[0].p, q[0]=b;
while(f<r)
{
sw2=0;
while(f<r)
{
f++;
if(q[f].y<=root)
{
if(ch[q[f].x][q[f].y])
{
if(f==r){
for(i=1;i<=w;i++) q[++r]=imsi[i];
w=0;
}
continue;
}
else{sw2=1; break;}
}
x=q[f].x; val=q[f].val; y=q[f].y; c=q[f].c;
if(x==a[1].x){printf("%d",val); return 0;}
if(ch[x][0]==0)
{
for(i=0;i<con[x].size();i++){
b.val=val; b.x=x; b.y=con[x][i]; b.c=0;
q[++r]=b;
}
}
if(c==1 || c==0){
for(i=x+y;i<n;i+=y){
b.val=val+1; b.x=i; b.y=y; b.c=1; imsi[++w]=b; break;
}
}
if(c==2 || c==0){
for(i=x-y;i>=0;i-=y){
b.val=val+1; b.x=i; b.y=y; b.c=2; imsi[++w]=b; break;
}
}
ch[x][0]=1;
if(f==r){
for(i=1;i<=w;i++) q[++r]=imsi[i];
w=0;
}
}
if(!sw2){sw=1; break;}
val=q[f].val; x=q[f].x; y=q[f].y; ch[x][y]=1;
if(x==a[1].x) break;
if(ch[x][0]==0)
{
for(i=0;i<con[x].size();i++){
b.val=val; b.x=x; b.y=con[x][i]; b.c=0;
q[++r]=b;
}
}
ch[x][0]=1;
if(x+y<n) b.val=val+1, b.x=x+y, b.y=y, b.c=0, imsi[++w]=b;
if(x-y>=0) b.val=val+1, b.x=x-y, b.y=y, b.c=0, imsi[++w]=b;
if(f==r){
for(i=1;i<=w;i++) q[++r]=imsi[i];
w=0;
}
}
if(sw) printf("-1");
else printf("%d",val);
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
171420 KB |
Output is correct |
2 |
Correct |
0 ms |
171420 KB |
Output is correct |
3 |
Correct |
0 ms |
171420 KB |
Output is correct |
4 |
Correct |
0 ms |
171420 KB |
Output is correct |
5 |
Correct |
0 ms |
171420 KB |
Output is correct |
6 |
Correct |
1 ms |
171420 KB |
Output is correct |
7 |
Correct |
0 ms |
171420 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
171420 KB |
Output is correct |
2 |
Correct |
0 ms |
171420 KB |
Output is correct |
3 |
Correct |
0 ms |
171420 KB |
Output is correct |
4 |
Correct |
0 ms |
171420 KB |
Output is correct |
5 |
Correct |
0 ms |
171420 KB |
Output is correct |
6 |
Correct |
0 ms |
171420 KB |
Output is correct |
7 |
Correct |
0 ms |
171420 KB |
Output is correct |
8 |
Correct |
0 ms |
171420 KB |
Output is correct |
9 |
Correct |
0 ms |
171420 KB |
Output is correct |
10 |
Correct |
0 ms |
171420 KB |
Output is correct |
11 |
Correct |
0 ms |
171420 KB |
Output is correct |
12 |
Correct |
0 ms |
171420 KB |
Output is correct |
13 |
Correct |
0 ms |
171420 KB |
Output is correct |
14 |
Correct |
0 ms |
171420 KB |
Output is correct |
15 |
Correct |
0 ms |
171420 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
171420 KB |
Output is correct |
2 |
Correct |
0 ms |
171420 KB |
Output is correct |
3 |
Correct |
0 ms |
171420 KB |
Output is correct |
4 |
Correct |
0 ms |
171420 KB |
Output is correct |
5 |
Correct |
0 ms |
171420 KB |
Output is correct |
6 |
Correct |
0 ms |
171420 KB |
Output is correct |
7 |
Correct |
0 ms |
171420 KB |
Output is correct |
8 |
Correct |
0 ms |
171420 KB |
Output is correct |
9 |
Correct |
0 ms |
171420 KB |
Output is correct |
10 |
Correct |
0 ms |
171420 KB |
Output is correct |
11 |
Correct |
0 ms |
171420 KB |
Output is correct |
12 |
Correct |
0 ms |
171420 KB |
Output is correct |
13 |
Correct |
0 ms |
171420 KB |
Output is correct |
14 |
Correct |
0 ms |
171420 KB |
Output is correct |
15 |
Correct |
0 ms |
171420 KB |
Output is correct |
16 |
Correct |
0 ms |
171420 KB |
Output is correct |
17 |
Correct |
0 ms |
171420 KB |
Output is correct |
18 |
Correct |
0 ms |
171420 KB |
Output is correct |
19 |
Correct |
0 ms |
171420 KB |
Output is correct |
20 |
Correct |
0 ms |
171420 KB |
Output is correct |
21 |
Correct |
0 ms |
171420 KB |
Output is correct |
22 |
Correct |
0 ms |
171420 KB |
Output is correct |
23 |
Correct |
0 ms |
171420 KB |
Output is correct |
24 |
Correct |
0 ms |
171420 KB |
Output is correct |
25 |
Correct |
0 ms |
171420 KB |
Output is correct |
26 |
Correct |
0 ms |
171420 KB |
Output is correct |
27 |
Correct |
0 ms |
171420 KB |
Output is correct |
28 |
Correct |
0 ms |
171420 KB |
Output is correct |
29 |
Correct |
0 ms |
171420 KB |
Output is correct |
30 |
Correct |
0 ms |
171420 KB |
Output is correct |
31 |
Correct |
3 ms |
171420 KB |
Output is correct |
32 |
Correct |
2 ms |
171420 KB |
Output is correct |
33 |
Correct |
6 ms |
171420 KB |
Output is correct |
34 |
Correct |
0 ms |
171420 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
171420 KB |
Output is correct |
2 |
Correct |
0 ms |
171420 KB |
Output is correct |
3 |
Correct |
0 ms |
171420 KB |
Output is correct |
4 |
Correct |
0 ms |
171420 KB |
Output is correct |
5 |
Correct |
0 ms |
171420 KB |
Output is correct |
6 |
Correct |
1 ms |
171420 KB |
Output is correct |
7 |
Correct |
0 ms |
171420 KB |
Output is correct |
8 |
Correct |
1 ms |
171420 KB |
Output is correct |
9 |
Correct |
0 ms |
171420 KB |
Output is correct |
10 |
Correct |
0 ms |
171420 KB |
Output is correct |
11 |
Correct |
0 ms |
171420 KB |
Output is correct |
12 |
Correct |
0 ms |
171420 KB |
Output is correct |
13 |
Correct |
0 ms |
171420 KB |
Output is correct |
14 |
Correct |
1 ms |
171420 KB |
Output is correct |
15 |
Correct |
0 ms |
171420 KB |
Output is correct |
16 |
Correct |
0 ms |
171420 KB |
Output is correct |
17 |
Correct |
0 ms |
171420 KB |
Output is correct |
18 |
Correct |
0 ms |
171420 KB |
Output is correct |
19 |
Correct |
0 ms |
171420 KB |
Output is correct |
20 |
Correct |
0 ms |
171420 KB |
Output is correct |
21 |
Correct |
0 ms |
171420 KB |
Output is correct |
22 |
Correct |
0 ms |
171420 KB |
Output is correct |
23 |
Correct |
2 ms |
171420 KB |
Output is correct |
24 |
Correct |
0 ms |
171420 KB |
Output is correct |
25 |
Correct |
0 ms |
171420 KB |
Output is correct |
26 |
Correct |
0 ms |
171420 KB |
Output is correct |
27 |
Correct |
1 ms |
171420 KB |
Output is correct |
28 |
Correct |
2 ms |
171420 KB |
Output is correct |
29 |
Correct |
0 ms |
171420 KB |
Output is correct |
30 |
Correct |
0 ms |
171420 KB |
Output is correct |
31 |
Correct |
3 ms |
171420 KB |
Output is correct |
32 |
Correct |
0 ms |
171420 KB |
Output is correct |
33 |
Correct |
0 ms |
171420 KB |
Output is correct |
34 |
Correct |
0 ms |
171420 KB |
Output is correct |
35 |
Correct |
6 ms |
171552 KB |
Output is correct |
36 |
Correct |
0 ms |
171420 KB |
Output is correct |
37 |
Correct |
0 ms |
171552 KB |
Output is correct |
38 |
Correct |
8 ms |
171552 KB |
Output is correct |
39 |
Correct |
6 ms |
171552 KB |
Output is correct |
40 |
Correct |
10 ms |
171552 KB |
Output is correct |
41 |
Correct |
10 ms |
171552 KB |
Output is correct |
42 |
Correct |
6 ms |
171552 KB |
Output is correct |
43 |
Correct |
0 ms |
171552 KB |
Output is correct |
44 |
Correct |
0 ms |
171552 KB |
Output is correct |
45 |
Correct |
18 ms |
171552 KB |
Output is correct |
46 |
Correct |
5 ms |
171552 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
171420 KB |
Output is correct |
2 |
Correct |
0 ms |
171420 KB |
Output is correct |
3 |
Correct |
0 ms |
171420 KB |
Output is correct |
4 |
Correct |
0 ms |
171420 KB |
Output is correct |
5 |
Correct |
0 ms |
171420 KB |
Output is correct |
6 |
Correct |
0 ms |
171420 KB |
Output is correct |
7 |
Correct |
0 ms |
171420 KB |
Output is correct |
8 |
Correct |
1 ms |
171420 KB |
Output is correct |
9 |
Correct |
0 ms |
171420 KB |
Output is correct |
10 |
Correct |
0 ms |
171420 KB |
Output is correct |
11 |
Correct |
0 ms |
171420 KB |
Output is correct |
12 |
Correct |
0 ms |
171420 KB |
Output is correct |
13 |
Correct |
0 ms |
171420 KB |
Output is correct |
14 |
Correct |
0 ms |
171420 KB |
Output is correct |
15 |
Correct |
0 ms |
171420 KB |
Output is correct |
16 |
Correct |
0 ms |
171420 KB |
Output is correct |
17 |
Correct |
1 ms |
171420 KB |
Output is correct |
18 |
Correct |
0 ms |
171420 KB |
Output is correct |
19 |
Correct |
0 ms |
171420 KB |
Output is correct |
20 |
Correct |
0 ms |
171420 KB |
Output is correct |
21 |
Correct |
0 ms |
171420 KB |
Output is correct |
22 |
Correct |
0 ms |
171420 KB |
Output is correct |
23 |
Correct |
0 ms |
171420 KB |
Output is correct |
24 |
Correct |
0 ms |
171420 KB |
Output is correct |
25 |
Correct |
0 ms |
171420 KB |
Output is correct |
26 |
Correct |
0 ms |
171420 KB |
Output is correct |
27 |
Correct |
0 ms |
171420 KB |
Output is correct |
28 |
Correct |
0 ms |
171420 KB |
Output is correct |
29 |
Correct |
4 ms |
171420 KB |
Output is correct |
30 |
Correct |
0 ms |
171420 KB |
Output is correct |
31 |
Correct |
0 ms |
171420 KB |
Output is correct |
32 |
Correct |
2 ms |
171420 KB |
Output is correct |
33 |
Correct |
3 ms |
171420 KB |
Output is correct |
34 |
Correct |
4 ms |
171420 KB |
Output is correct |
35 |
Correct |
6 ms |
171552 KB |
Output is correct |
36 |
Correct |
0 ms |
171420 KB |
Output is correct |
37 |
Correct |
0 ms |
171552 KB |
Output is correct |
38 |
Correct |
0 ms |
171552 KB |
Output is correct |
39 |
Correct |
0 ms |
171552 KB |
Output is correct |
40 |
Correct |
0 ms |
171552 KB |
Output is correct |
41 |
Correct |
0 ms |
171552 KB |
Output is correct |
42 |
Correct |
0 ms |
171552 KB |
Output is correct |
43 |
Correct |
8 ms |
171552 KB |
Output is correct |
44 |
Correct |
8 ms |
171552 KB |
Output is correct |
45 |
Correct |
20 ms |
171552 KB |
Output is correct |
46 |
Correct |
10 ms |
171552 KB |
Output is correct |
47 |
Correct |
7 ms |
171684 KB |
Output is correct |
48 |
Correct |
10 ms |
171816 KB |
Output is correct |
49 |
Correct |
9 ms |
171816 KB |
Output is correct |
50 |
Correct |
6 ms |
171684 KB |
Output is correct |
51 |
Correct |
16 ms |
171948 KB |
Output is correct |
52 |
Correct |
15 ms |
171948 KB |
Output is correct |
53 |
Correct |
12 ms |
171948 KB |
Output is correct |
54 |
Correct |
0 ms |
171420 KB |
Output is correct |
55 |
Correct |
3 ms |
171420 KB |
Output is correct |
56 |
Correct |
15 ms |
172344 KB |
Output is correct |
57 |
Correct |
0 ms |
171420 KB |
Output is correct |
58 |
Correct |
12 ms |
171552 KB |
Output is correct |
59 |
Correct |
0 ms |
171552 KB |
Output is correct |
60 |
Correct |
13 ms |
171556 KB |
Output is correct |
61 |
Correct |
14 ms |
171568 KB |
Output is correct |
62 |
Correct |
38 ms |
172344 KB |
Output is correct |
63 |
Correct |
55 ms |
171552 KB |
Output is correct |
64 |
Correct |
74 ms |
171552 KB |
Output is correct |
65 |
Correct |
140 ms |
171552 KB |
Output is correct |
66 |
Runtime error |
133 ms |
171548 KB |
Program hung waiting for input |
67 |
Halted |
0 ms |
0 KB |
- |