#include <iostream>
#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
#define a first
#define b second
#define endl "\n"
int dis[2020][2020];
int b[2020];
int p[2020];
vector<pair<int,int>> adj[2020][2020];
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int n,m;
cin>>n>>m;
//map<pair<int,int><int,int>,int> aa;
for(int i=0;i<m;i++){
cin>>b[i]>>p[i];
for(int j=b[i]-p[i];j>=0;j=j-p[i]){
adj[j+p[i]][p[i]].pb(mp(j,p[i]));
adj[j+p[i]][p[i]].pb(mp(j,2010));
}
for(int j=b[i]+p[i];j<n;j=j+p[i]){
adj[j-p[i]][p[i]].pb(mp(j,p[i]));
adj[j-p[i]][p[i]].pb(mp(j,2010));
}
adj[b[i]][2010].pb(mp(b[i],p[i]));
adj[b[i]][p[i]].pb(mp(b[i],2010));
}
memset(dis,-1,sizeof(dis));
dis[b[0]][2010]=0;
dis[b[0]][p[0]]=0;
deque<pair<int,int>> aaa;
aaa.push_back(mp(b[0],p[0]));
aaa.push_back(mp(b[0],2010));
while(!aaa.empty()){
pair<int,int> x;
x=aaa.front();
// cout<<x.a<<" "<<x.b<<" "<<dis[x.a][x.b]<<endl;
aaa.pop_front();
int co=1;
if(x.b==2010){
co=0;
}
for(auto nn:adj[x.a][x.b]){
if(dis[nn.a][nn.b]==-1 or dis[nn.a][nn.b]>dis[x.a][x.b]+co){
/*int st=0;
if(nn.b==2010 and x.b!=2010){
co=0;
st=1;
}*/
dis[nn.a][nn.b]=dis[x.a][x.b]+co;
if(co==0){
aaa.push_front(nn);
}
else{
aaa.push_back(nn);
}
/*if(st){
co=1;
}*/
}
}
}
/* if(b[0]==b[1]){
cout<<0<<endl;
return 0;
}*/
cout<<dis[b[1]][p[1]]<<endl;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
78 ms |
112120 KB |
Output is correct |
2 |
Correct |
78 ms |
112116 KB |
Output is correct |
3 |
Correct |
76 ms |
112120 KB |
Output is correct |
4 |
Correct |
77 ms |
112120 KB |
Output is correct |
5 |
Correct |
74 ms |
112120 KB |
Output is correct |
6 |
Correct |
77 ms |
112120 KB |
Output is correct |
7 |
Correct |
76 ms |
112120 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
78 ms |
112120 KB |
Output is correct |
2 |
Correct |
77 ms |
112120 KB |
Output is correct |
3 |
Correct |
76 ms |
112248 KB |
Output is correct |
4 |
Correct |
76 ms |
112120 KB |
Output is correct |
5 |
Correct |
77 ms |
112120 KB |
Output is correct |
6 |
Correct |
77 ms |
112120 KB |
Output is correct |
7 |
Correct |
77 ms |
112120 KB |
Output is correct |
8 |
Correct |
75 ms |
112120 KB |
Output is correct |
9 |
Correct |
79 ms |
112248 KB |
Output is correct |
10 |
Correct |
78 ms |
112248 KB |
Output is correct |
11 |
Correct |
78 ms |
112408 KB |
Output is correct |
12 |
Correct |
86 ms |
115580 KB |
Output is correct |
13 |
Correct |
83 ms |
115576 KB |
Output is correct |
14 |
Correct |
81 ms |
112376 KB |
Output is correct |
15 |
Correct |
78 ms |
112376 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
78 ms |
112120 KB |
Output is correct |
2 |
Correct |
82 ms |
112120 KB |
Output is correct |
3 |
Correct |
76 ms |
112120 KB |
Output is correct |
4 |
Correct |
75 ms |
112248 KB |
Output is correct |
5 |
Correct |
77 ms |
112120 KB |
Output is correct |
6 |
Correct |
84 ms |
112120 KB |
Output is correct |
7 |
Correct |
79 ms |
112248 KB |
Output is correct |
8 |
Correct |
78 ms |
112120 KB |
Output is correct |
9 |
Correct |
76 ms |
112120 KB |
Output is correct |
10 |
Correct |
77 ms |
112248 KB |
Output is correct |
11 |
Correct |
90 ms |
112476 KB |
Output is correct |
12 |
Correct |
85 ms |
115608 KB |
Output is correct |
13 |
Correct |
84 ms |
115600 KB |
Output is correct |
14 |
Correct |
81 ms |
112328 KB |
Output is correct |
15 |
Correct |
79 ms |
112376 KB |
Output is correct |
16 |
Correct |
77 ms |
112248 KB |
Output is correct |
17 |
Correct |
83 ms |
112760 KB |
Output is correct |
18 |
Correct |
82 ms |
112376 KB |
Output is correct |
19 |
Correct |
78 ms |
112352 KB |
Output is correct |
20 |
Correct |
407 ms |
181264 KB |
Output is correct |
21 |
Correct |
79 ms |
112248 KB |
Output is correct |
22 |
Correct |
80 ms |
112376 KB |
Output is correct |
23 |
Correct |
80 ms |
112376 KB |
Output is correct |
24 |
Correct |
85 ms |
112632 KB |
Output is correct |
25 |
Correct |
81 ms |
112504 KB |
Output is correct |
26 |
Correct |
387 ms |
176888 KB |
Output is correct |
27 |
Correct |
370 ms |
175224 KB |
Output is correct |
28 |
Correct |
88 ms |
112888 KB |
Output is correct |
29 |
Correct |
102 ms |
114168 KB |
Output is correct |
30 |
Correct |
85 ms |
112632 KB |
Output is correct |
31 |
Correct |
92 ms |
113144 KB |
Output is correct |
32 |
Correct |
88 ms |
112888 KB |
Output is correct |
33 |
Correct |
130 ms |
115936 KB |
Output is correct |
34 |
Correct |
126 ms |
115960 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
76 ms |
112120 KB |
Output is correct |
2 |
Correct |
80 ms |
112148 KB |
Output is correct |
3 |
Correct |
75 ms |
112120 KB |
Output is correct |
4 |
Correct |
77 ms |
112248 KB |
Output is correct |
5 |
Correct |
77 ms |
112120 KB |
Output is correct |
6 |
Correct |
78 ms |
112248 KB |
Output is correct |
7 |
Correct |
77 ms |
112120 KB |
Output is correct |
8 |
Correct |
78 ms |
112120 KB |
Output is correct |
9 |
Correct |
80 ms |
112120 KB |
Output is correct |
10 |
Correct |
80 ms |
112376 KB |
Output is correct |
11 |
Correct |
76 ms |
112376 KB |
Output is correct |
12 |
Correct |
84 ms |
115580 KB |
Output is correct |
13 |
Correct |
87 ms |
115576 KB |
Output is correct |
14 |
Correct |
80 ms |
112376 KB |
Output is correct |
15 |
Correct |
80 ms |
112376 KB |
Output is correct |
16 |
Correct |
79 ms |
112376 KB |
Output is correct |
17 |
Correct |
85 ms |
112760 KB |
Output is correct |
18 |
Correct |
79 ms |
112504 KB |
Output is correct |
19 |
Correct |
78 ms |
112248 KB |
Output is correct |
20 |
Correct |
410 ms |
181244 KB |
Output is correct |
21 |
Correct |
79 ms |
112248 KB |
Output is correct |
22 |
Correct |
78 ms |
112376 KB |
Output is correct |
23 |
Correct |
81 ms |
112376 KB |
Output is correct |
24 |
Correct |
83 ms |
112504 KB |
Output is correct |
25 |
Correct |
82 ms |
112376 KB |
Output is correct |
26 |
Correct |
388 ms |
176816 KB |
Output is correct |
27 |
Correct |
371 ms |
175228 KB |
Output is correct |
28 |
Correct |
87 ms |
112888 KB |
Output is correct |
29 |
Correct |
98 ms |
114044 KB |
Output is correct |
30 |
Correct |
82 ms |
112632 KB |
Output is correct |
31 |
Correct |
90 ms |
113144 KB |
Output is correct |
32 |
Correct |
90 ms |
112888 KB |
Output is correct |
33 |
Correct |
126 ms |
115960 KB |
Output is correct |
34 |
Correct |
125 ms |
115960 KB |
Output is correct |
35 |
Incorrect |
144 ms |
116752 KB |
Output isn't correct |
36 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
77 ms |
112120 KB |
Output is correct |
2 |
Correct |
79 ms |
112120 KB |
Output is correct |
3 |
Correct |
82 ms |
112248 KB |
Output is correct |
4 |
Correct |
77 ms |
112120 KB |
Output is correct |
5 |
Correct |
79 ms |
112120 KB |
Output is correct |
6 |
Correct |
81 ms |
112248 KB |
Output is correct |
7 |
Correct |
78 ms |
112120 KB |
Output is correct |
8 |
Correct |
78 ms |
112120 KB |
Output is correct |
9 |
Correct |
82 ms |
112120 KB |
Output is correct |
10 |
Correct |
81 ms |
112376 KB |
Output is correct |
11 |
Correct |
79 ms |
112380 KB |
Output is correct |
12 |
Correct |
87 ms |
115576 KB |
Output is correct |
13 |
Correct |
85 ms |
115576 KB |
Output is correct |
14 |
Correct |
81 ms |
112376 KB |
Output is correct |
15 |
Correct |
79 ms |
112376 KB |
Output is correct |
16 |
Correct |
79 ms |
112376 KB |
Output is correct |
17 |
Correct |
83 ms |
112760 KB |
Output is correct |
18 |
Correct |
79 ms |
112376 KB |
Output is correct |
19 |
Correct |
79 ms |
112248 KB |
Output is correct |
20 |
Correct |
414 ms |
181308 KB |
Output is correct |
21 |
Correct |
78 ms |
112248 KB |
Output is correct |
22 |
Correct |
80 ms |
112380 KB |
Output is correct |
23 |
Correct |
81 ms |
112380 KB |
Output is correct |
24 |
Correct |
84 ms |
112632 KB |
Output is correct |
25 |
Correct |
81 ms |
112380 KB |
Output is correct |
26 |
Correct |
378 ms |
176888 KB |
Output is correct |
27 |
Correct |
371 ms |
175224 KB |
Output is correct |
28 |
Correct |
86 ms |
112892 KB |
Output is correct |
29 |
Correct |
108 ms |
114040 KB |
Output is correct |
30 |
Correct |
86 ms |
112636 KB |
Output is correct |
31 |
Correct |
93 ms |
113144 KB |
Output is correct |
32 |
Correct |
86 ms |
112888 KB |
Output is correct |
33 |
Correct |
125 ms |
115960 KB |
Output is correct |
34 |
Correct |
123 ms |
115960 KB |
Output is correct |
35 |
Incorrect |
147 ms |
116728 KB |
Output isn't correct |
36 |
Halted |
0 ms |
0 KB |
- |