#include <bits/stdc++.h>
using namespace std;
#define PB push_back
#define B 200
struct t{
int c,x,y;
};
int n,m,b[30005],p[30005];
vector<int>g[30005];
int vis[30005],d[30005][200],q[30005][200];
int main(void){
scanf("%d%d",&n,&m);
for(int i=0;i<m;i++){
scanf("%d%d",b+i,p+i);
g[b[i]].PB(i);
}
for(int i=0;i<n;i++){
vis[i]=-1;
for(int j=0;j<B;j++)d[i][j]=-1;
}
for(int i=0;i<m;i++)for(int j=0;j<=n/B;j++)q[i][j]=-1;
queue<t>bfs;
bfs.push(t{0,b[0],0});
while(!bfs.empty()){
int c=bfs.front().c,x=bfs.front().x,y=bfs.front().y,z=(x-b[y]%p[y])/p[y];
bfs.pop();
if(x<0||n<=x)continue;
if(vis[x]==-1){
vis[x]=c;
for(int i=0;i<g[x].size();i++){
int u=g[x][i];
bfs.push(t{c+1,x-p[u],u});
bfs.push(t{c+1,x+p[u],u});
}
}
if(p[y]<B&&d[x][p[y]]==-1){
d[x][p[y]]=c;
bfs.push(t{c+1,x-p[y],y});
bfs.push(t{c+1,x+p[y],y});
}
if(p[y]>=B&&q[y][z]==-1){
q[y][z]=c;
bfs.push(t{c+1,x-p[y],y});
bfs.push(t{c+1,x+p[y],y});
}
}
printf("%d\n",vis[b[1]]);
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:30:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i=0;i<g[x].size();i++){
~^~~~~~~~~~~~
skyscraper.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n,&m);
~~~~~^~~~~~~~~~~~~~
skyscraper.cpp:14:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",b+i,p+i);
~~~~~^~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
1024 KB |
Output is correct |
2 |
Correct |
3 ms |
1024 KB |
Output is correct |
3 |
Correct |
3 ms |
1100 KB |
Output is correct |
4 |
Correct |
3 ms |
1024 KB |
Output is correct |
5 |
Correct |
3 ms |
1024 KB |
Output is correct |
6 |
Correct |
3 ms |
1152 KB |
Output is correct |
7 |
Correct |
4 ms |
1024 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
1024 KB |
Output is correct |
2 |
Correct |
3 ms |
1024 KB |
Output is correct |
3 |
Correct |
3 ms |
1024 KB |
Output is correct |
4 |
Correct |
3 ms |
1024 KB |
Output is correct |
5 |
Correct |
2 ms |
1024 KB |
Output is correct |
6 |
Correct |
3 ms |
1024 KB |
Output is correct |
7 |
Correct |
2 ms |
1024 KB |
Output is correct |
8 |
Correct |
3 ms |
1152 KB |
Output is correct |
9 |
Correct |
2 ms |
1152 KB |
Output is correct |
10 |
Correct |
4 ms |
1536 KB |
Output is correct |
11 |
Correct |
5 ms |
2816 KB |
Output is correct |
12 |
Correct |
4 ms |
2816 KB |
Output is correct |
13 |
Correct |
4 ms |
2688 KB |
Output is correct |
14 |
Correct |
5 ms |
2816 KB |
Output is correct |
15 |
Correct |
5 ms |
2816 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
1024 KB |
Output is correct |
2 |
Correct |
2 ms |
1024 KB |
Output is correct |
3 |
Correct |
2 ms |
1024 KB |
Output is correct |
4 |
Correct |
2 ms |
1024 KB |
Output is correct |
5 |
Correct |
2 ms |
1024 KB |
Output is correct |
6 |
Correct |
2 ms |
1024 KB |
Output is correct |
7 |
Correct |
3 ms |
1024 KB |
Output is correct |
8 |
Correct |
3 ms |
1152 KB |
Output is correct |
9 |
Correct |
2 ms |
1152 KB |
Output is correct |
10 |
Correct |
3 ms |
1408 KB |
Output is correct |
11 |
Correct |
5 ms |
2816 KB |
Output is correct |
12 |
Correct |
5 ms |
2688 KB |
Output is correct |
13 |
Correct |
4 ms |
2688 KB |
Output is correct |
14 |
Correct |
5 ms |
2816 KB |
Output is correct |
15 |
Correct |
4 ms |
2816 KB |
Output is correct |
16 |
Correct |
4 ms |
1920 KB |
Output is correct |
17 |
Correct |
7 ms |
3172 KB |
Output is correct |
18 |
Correct |
5 ms |
3200 KB |
Output is correct |
19 |
Correct |
5 ms |
3072 KB |
Output is correct |
20 |
Correct |
7 ms |
4352 KB |
Output is correct |
21 |
Correct |
4 ms |
2304 KB |
Output is correct |
22 |
Correct |
4 ms |
3072 KB |
Output is correct |
23 |
Correct |
5 ms |
3072 KB |
Output is correct |
24 |
Correct |
6 ms |
4096 KB |
Output is correct |
25 |
Correct |
8 ms |
4224 KB |
Output is correct |
26 |
Correct |
7 ms |
4224 KB |
Output is correct |
27 |
Correct |
8 ms |
4340 KB |
Output is correct |
28 |
Correct |
8 ms |
4352 KB |
Output is correct |
29 |
Correct |
11 ms |
3328 KB |
Output is correct |
30 |
Correct |
6 ms |
2816 KB |
Output is correct |
31 |
Correct |
6 ms |
3200 KB |
Output is correct |
32 |
Correct |
5 ms |
3072 KB |
Output is correct |
33 |
Correct |
9 ms |
4352 KB |
Output is correct |
34 |
Correct |
10 ms |
4352 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
2 ms |
1024 KB |
Output is correct |
2 |
Correct |
3 ms |
1024 KB |
Output is correct |
3 |
Correct |
3 ms |
1024 KB |
Output is correct |
4 |
Correct |
3 ms |
1024 KB |
Output is correct |
5 |
Correct |
3 ms |
1024 KB |
Output is correct |
6 |
Correct |
3 ms |
1024 KB |
Output is correct |
7 |
Correct |
3 ms |
1024 KB |
Output is correct |
8 |
Correct |
3 ms |
1024 KB |
Output is correct |
9 |
Correct |
3 ms |
1152 KB |
Output is correct |
10 |
Correct |
3 ms |
1472 KB |
Output is correct |
11 |
Correct |
5 ms |
2816 KB |
Output is correct |
12 |
Correct |
5 ms |
2816 KB |
Output is correct |
13 |
Correct |
5 ms |
2688 KB |
Output is correct |
14 |
Correct |
4 ms |
2816 KB |
Output is correct |
15 |
Correct |
6 ms |
2816 KB |
Output is correct |
16 |
Correct |
3 ms |
1920 KB |
Output is correct |
17 |
Correct |
5 ms |
3200 KB |
Output is correct |
18 |
Correct |
6 ms |
3200 KB |
Output is correct |
19 |
Correct |
6 ms |
3072 KB |
Output is correct |
20 |
Correct |
8 ms |
4224 KB |
Output is correct |
21 |
Correct |
4 ms |
2304 KB |
Output is correct |
22 |
Correct |
5 ms |
3072 KB |
Output is correct |
23 |
Correct |
5 ms |
3072 KB |
Output is correct |
24 |
Correct |
7 ms |
4096 KB |
Output is correct |
25 |
Correct |
6 ms |
4224 KB |
Output is correct |
26 |
Correct |
7 ms |
4224 KB |
Output is correct |
27 |
Correct |
6 ms |
4224 KB |
Output is correct |
28 |
Correct |
11 ms |
4224 KB |
Output is correct |
29 |
Correct |
7 ms |
3200 KB |
Output is correct |
30 |
Correct |
5 ms |
2816 KB |
Output is correct |
31 |
Correct |
7 ms |
3072 KB |
Output is correct |
32 |
Correct |
5 ms |
3072 KB |
Output is correct |
33 |
Correct |
13 ms |
4352 KB |
Output is correct |
34 |
Correct |
11 ms |
4352 KB |
Output is correct |
35 |
Correct |
39 ms |
23296 KB |
Output is correct |
36 |
Correct |
9 ms |
5760 KB |
Output is correct |
37 |
Correct |
44 ms |
19044 KB |
Output is correct |
38 |
Correct |
42 ms |
27384 KB |
Output is correct |
39 |
Correct |
43 ms |
27384 KB |
Output is correct |
40 |
Correct |
42 ms |
27392 KB |
Output is correct |
41 |
Correct |
41 ms |
27356 KB |
Output is correct |
42 |
Correct |
27 ms |
27264 KB |
Output is correct |
43 |
Correct |
28 ms |
27128 KB |
Output is correct |
44 |
Correct |
29 ms |
27132 KB |
Output is correct |
45 |
Correct |
53 ms |
27896 KB |
Output is correct |
46 |
Correct |
79 ms |
27904 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
3 ms |
1024 KB |
Output is correct |
2 |
Correct |
3 ms |
1024 KB |
Output is correct |
3 |
Correct |
2 ms |
1024 KB |
Output is correct |
4 |
Correct |
2 ms |
1024 KB |
Output is correct |
5 |
Correct |
2 ms |
1052 KB |
Output is correct |
6 |
Correct |
2 ms |
1024 KB |
Output is correct |
7 |
Correct |
3 ms |
1024 KB |
Output is correct |
8 |
Correct |
3 ms |
1152 KB |
Output is correct |
9 |
Correct |
3 ms |
1152 KB |
Output is correct |
10 |
Correct |
23 ms |
1408 KB |
Output is correct |
11 |
Correct |
5 ms |
2816 KB |
Output is correct |
12 |
Correct |
5 ms |
2688 KB |
Output is correct |
13 |
Correct |
4 ms |
2688 KB |
Output is correct |
14 |
Correct |
4 ms |
2816 KB |
Output is correct |
15 |
Correct |
5 ms |
2816 KB |
Output is correct |
16 |
Correct |
4 ms |
1920 KB |
Output is correct |
17 |
Correct |
5 ms |
3072 KB |
Output is correct |
18 |
Correct |
5 ms |
3200 KB |
Output is correct |
19 |
Correct |
4 ms |
3120 KB |
Output is correct |
20 |
Correct |
6 ms |
4224 KB |
Output is correct |
21 |
Correct |
4 ms |
2304 KB |
Output is correct |
22 |
Correct |
4 ms |
3072 KB |
Output is correct |
23 |
Correct |
5 ms |
3072 KB |
Output is correct |
24 |
Correct |
8 ms |
4096 KB |
Output is correct |
25 |
Correct |
6 ms |
4224 KB |
Output is correct |
26 |
Correct |
7 ms |
4224 KB |
Output is correct |
27 |
Correct |
6 ms |
4224 KB |
Output is correct |
28 |
Correct |
8 ms |
4224 KB |
Output is correct |
29 |
Correct |
6 ms |
3328 KB |
Output is correct |
30 |
Correct |
6 ms |
2816 KB |
Output is correct |
31 |
Correct |
6 ms |
3072 KB |
Output is correct |
32 |
Correct |
6 ms |
3072 KB |
Output is correct |
33 |
Correct |
18 ms |
4352 KB |
Output is correct |
34 |
Correct |
13 ms |
4352 KB |
Output is correct |
35 |
Correct |
36 ms |
23296 KB |
Output is correct |
36 |
Correct |
11 ms |
5888 KB |
Output is correct |
37 |
Correct |
41 ms |
18936 KB |
Output is correct |
38 |
Correct |
49 ms |
27384 KB |
Output is correct |
39 |
Correct |
50 ms |
27384 KB |
Output is correct |
40 |
Correct |
51 ms |
27384 KB |
Output is correct |
41 |
Correct |
53 ms |
27384 KB |
Output is correct |
42 |
Correct |
31 ms |
27256 KB |
Output is correct |
43 |
Correct |
30 ms |
27256 KB |
Output is correct |
44 |
Correct |
28 ms |
27264 KB |
Output is correct |
45 |
Correct |
62 ms |
28024 KB |
Output is correct |
46 |
Correct |
63 ms |
27896 KB |
Output is correct |
47 |
Correct |
122 ms |
31480 KB |
Output is correct |
48 |
Correct |
46 ms |
37496 KB |
Output is correct |
49 |
Correct |
42 ms |
38264 KB |
Output is correct |
50 |
Correct |
36 ms |
35064 KB |
Output is correct |
51 |
Correct |
87 ms |
49276 KB |
Output is correct |
52 |
Correct |
107 ms |
49272 KB |
Output is correct |
53 |
Correct |
75 ms |
48888 KB |
Output is correct |
54 |
Correct |
25 ms |
24592 KB |
Output is correct |
55 |
Correct |
34 ms |
24568 KB |
Output is correct |
56 |
Correct |
60 ms |
49272 KB |
Output is correct |
57 |
Correct |
63 ms |
26624 KB |
Output is correct |
58 |
Correct |
63 ms |
49256 KB |
Output is correct |
59 |
Correct |
74 ms |
49144 KB |
Output is correct |
60 |
Correct |
63 ms |
49156 KB |
Output is correct |
61 |
Correct |
75 ms |
49148 KB |
Output is correct |
62 |
Correct |
101 ms |
49272 KB |
Output is correct |
63 |
Correct |
199 ms |
49020 KB |
Output is correct |
64 |
Correct |
228 ms |
49016 KB |
Output is correct |
65 |
Correct |
469 ms |
49272 KB |
Output is correct |
66 |
Correct |
567 ms |
50168 KB |
Output is correct |
67 |
Correct |
475 ms |
50068 KB |
Output is correct |