// same from Nson's code https://oj.uz/submission/243889
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> pii;
typedef pair<int,pii> pip;
#define f first
#define s second
const int maxn = 3e4+10, magic = 200, inf = 0x3f3f3f3f;
int b[maxn], p[maxn], dist1[maxn], dist2[maxn][magic+5];
vector<int> doges[maxn];
bool mark[maxn];
vector<pii> fila[maxn*magic];
int main(){
ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
int n, m;
cin >> n >> m;
for(int i=0; i<m; i++){
cin >> b[i] >> p[i];
doges[b[i]].push_back(i);
}
memset(dist1, inf, sizeof dist1);
memset(dist2, inf, sizeof dist2);
fila[0].push_back({b[0], 0});
for(int d = 0; !fila[d].empty(); d++) {
while(!fila[d].empty()){
int u = fila[d].back().f, id = fila[d].back().s;
int power = p[id];
fila[d].pop_back();
if(power <= magic){
if(dist2[u][power] == inf) dist2[u][power] = d;
if(u + power < n and dist2[u + power][power] == inf){
fila[d + 1].push_back({u + power, id});
dist2[u + power][power] = d + 1;
}
if(u - power >= 0 and dist2[u - power][power] == inf){
fila[d + 1].push_back({u - power, id});
dist2[u - power][power] = d + 1;
}
}
else{
if(dist1[u] == inf) dist1[u] = d;
if(!mark[id]){
mark[id] = 1;
for(int v=u+power, qtd=1; v<n; v+=power, qtd++) fila[d+qtd].push_back({v, id});
for(int v=u-power, qtd=1; v>=0; v-=power, qtd++) fila[d+qtd].push_back({v, id});
}
}
if(!doges[u].empty()){
for(auto v : doges[u]) fila[d].push_back({u, v});
doges[u].clear();
}
}
}
int ans = dist1[b[1]];
for(int i=1; i<=magic; i++) ans = min(ans, dist2[b[1]][i]);
cout << (ans == inf ? -1 : ans) << "\n";
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
104 ms |
166136 KB |
Output is correct |
2 |
Correct |
106 ms |
166204 KB |
Output is correct |
3 |
Correct |
104 ms |
166264 KB |
Output is correct |
4 |
Correct |
116 ms |
166136 KB |
Output is correct |
5 |
Correct |
106 ms |
166264 KB |
Output is correct |
6 |
Correct |
118 ms |
166136 KB |
Output is correct |
7 |
Correct |
111 ms |
166264 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
102 ms |
166136 KB |
Output is correct |
2 |
Correct |
106 ms |
166136 KB |
Output is correct |
3 |
Correct |
113 ms |
166136 KB |
Output is correct |
4 |
Correct |
119 ms |
166264 KB |
Output is correct |
5 |
Correct |
111 ms |
166264 KB |
Output is correct |
6 |
Correct |
108 ms |
166136 KB |
Output is correct |
7 |
Correct |
106 ms |
166264 KB |
Output is correct |
8 |
Correct |
115 ms |
166136 KB |
Output is correct |
9 |
Correct |
112 ms |
166136 KB |
Output is correct |
10 |
Correct |
102 ms |
166232 KB |
Output is correct |
11 |
Correct |
104 ms |
166264 KB |
Output is correct |
12 |
Correct |
103 ms |
166264 KB |
Output is correct |
13 |
Correct |
103 ms |
166264 KB |
Output is correct |
14 |
Correct |
102 ms |
166264 KB |
Output is correct |
15 |
Correct |
107 ms |
166264 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
112 ms |
166136 KB |
Output is correct |
2 |
Correct |
119 ms |
166136 KB |
Output is correct |
3 |
Correct |
108 ms |
166264 KB |
Output is correct |
4 |
Correct |
107 ms |
166264 KB |
Output is correct |
5 |
Correct |
113 ms |
166136 KB |
Output is correct |
6 |
Correct |
104 ms |
166136 KB |
Output is correct |
7 |
Correct |
112 ms |
166136 KB |
Output is correct |
8 |
Correct |
108 ms |
166264 KB |
Output is correct |
9 |
Correct |
101 ms |
166264 KB |
Output is correct |
10 |
Correct |
105 ms |
166136 KB |
Output is correct |
11 |
Correct |
106 ms |
166240 KB |
Output is correct |
12 |
Correct |
102 ms |
166264 KB |
Output is correct |
13 |
Correct |
104 ms |
166264 KB |
Output is correct |
14 |
Correct |
111 ms |
166264 KB |
Output is correct |
15 |
Correct |
109 ms |
166316 KB |
Output is correct |
16 |
Correct |
115 ms |
166136 KB |
Output is correct |
17 |
Correct |
102 ms |
166392 KB |
Output is correct |
18 |
Correct |
103 ms |
166268 KB |
Output is correct |
19 |
Correct |
104 ms |
166136 KB |
Output is correct |
20 |
Correct |
104 ms |
166264 KB |
Output is correct |
21 |
Correct |
100 ms |
166264 KB |
Output is correct |
22 |
Correct |
109 ms |
166264 KB |
Output is correct |
23 |
Correct |
113 ms |
166264 KB |
Output is correct |
24 |
Correct |
110 ms |
166392 KB |
Output is correct |
25 |
Correct |
104 ms |
166392 KB |
Output is correct |
26 |
Correct |
101 ms |
166392 KB |
Output is correct |
27 |
Correct |
101 ms |
166392 KB |
Output is correct |
28 |
Correct |
108 ms |
166904 KB |
Output is correct |
29 |
Correct |
116 ms |
166904 KB |
Output is correct |
30 |
Correct |
110 ms |
166392 KB |
Output is correct |
31 |
Correct |
106 ms |
166584 KB |
Output is correct |
32 |
Correct |
103 ms |
166648 KB |
Output is correct |
33 |
Correct |
113 ms |
167416 KB |
Output is correct |
34 |
Correct |
109 ms |
167352 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
100 ms |
166140 KB |
Output is correct |
2 |
Correct |
109 ms |
166264 KB |
Output is correct |
3 |
Correct |
100 ms |
166136 KB |
Output is correct |
4 |
Correct |
101 ms |
166136 KB |
Output is correct |
5 |
Correct |
102 ms |
166264 KB |
Output is correct |
6 |
Correct |
109 ms |
166136 KB |
Output is correct |
7 |
Correct |
102 ms |
166136 KB |
Output is correct |
8 |
Correct |
113 ms |
166136 KB |
Output is correct |
9 |
Correct |
110 ms |
166264 KB |
Output is correct |
10 |
Correct |
101 ms |
166264 KB |
Output is correct |
11 |
Correct |
111 ms |
166264 KB |
Output is correct |
12 |
Correct |
114 ms |
166264 KB |
Output is correct |
13 |
Correct |
106 ms |
166232 KB |
Output is correct |
14 |
Correct |
105 ms |
166324 KB |
Output is correct |
15 |
Correct |
101 ms |
166264 KB |
Output is correct |
16 |
Correct |
103 ms |
166136 KB |
Output is correct |
17 |
Correct |
105 ms |
166392 KB |
Output is correct |
18 |
Correct |
102 ms |
166268 KB |
Output is correct |
19 |
Correct |
116 ms |
166136 KB |
Output is correct |
20 |
Correct |
102 ms |
166392 KB |
Output is correct |
21 |
Correct |
100 ms |
166264 KB |
Output is correct |
22 |
Correct |
99 ms |
166264 KB |
Output is correct |
23 |
Correct |
102 ms |
166520 KB |
Output is correct |
24 |
Correct |
101 ms |
166392 KB |
Output is correct |
25 |
Correct |
105 ms |
166392 KB |
Output is correct |
26 |
Correct |
100 ms |
166392 KB |
Output is correct |
27 |
Correct |
100 ms |
166392 KB |
Output is correct |
28 |
Correct |
105 ms |
167072 KB |
Output is correct |
29 |
Correct |
103 ms |
166904 KB |
Output is correct |
30 |
Correct |
100 ms |
166392 KB |
Output is correct |
31 |
Correct |
111 ms |
166648 KB |
Output is correct |
32 |
Correct |
103 ms |
166520 KB |
Output is correct |
33 |
Correct |
114 ms |
167288 KB |
Output is correct |
34 |
Correct |
103 ms |
167288 KB |
Output is correct |
35 |
Correct |
107 ms |
167288 KB |
Output is correct |
36 |
Correct |
112 ms |
166392 KB |
Output is correct |
37 |
Correct |
111 ms |
167924 KB |
Output is correct |
38 |
Correct |
113 ms |
167924 KB |
Output is correct |
39 |
Correct |
113 ms |
167864 KB |
Output is correct |
40 |
Correct |
111 ms |
167996 KB |
Output is correct |
41 |
Correct |
110 ms |
167876 KB |
Output is correct |
42 |
Correct |
115 ms |
167032 KB |
Output is correct |
43 |
Correct |
109 ms |
167128 KB |
Output is correct |
44 |
Correct |
121 ms |
167032 KB |
Output is correct |
45 |
Correct |
118 ms |
170580 KB |
Output is correct |
46 |
Correct |
118 ms |
170536 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
104 ms |
166264 KB |
Output is correct |
2 |
Correct |
103 ms |
166264 KB |
Output is correct |
3 |
Correct |
104 ms |
166264 KB |
Output is correct |
4 |
Correct |
111 ms |
166136 KB |
Output is correct |
5 |
Correct |
109 ms |
166264 KB |
Output is correct |
6 |
Correct |
113 ms |
166136 KB |
Output is correct |
7 |
Correct |
99 ms |
166136 KB |
Output is correct |
8 |
Correct |
101 ms |
166136 KB |
Output is correct |
9 |
Correct |
100 ms |
166140 KB |
Output is correct |
10 |
Correct |
112 ms |
166264 KB |
Output is correct |
11 |
Correct |
110 ms |
166264 KB |
Output is correct |
12 |
Correct |
99 ms |
166264 KB |
Output is correct |
13 |
Correct |
100 ms |
166264 KB |
Output is correct |
14 |
Correct |
101 ms |
166264 KB |
Output is correct |
15 |
Correct |
112 ms |
166264 KB |
Output is correct |
16 |
Correct |
101 ms |
166264 KB |
Output is correct |
17 |
Correct |
104 ms |
166364 KB |
Output is correct |
18 |
Correct |
100 ms |
166264 KB |
Output is correct |
19 |
Correct |
103 ms |
166264 KB |
Output is correct |
20 |
Correct |
104 ms |
166392 KB |
Output is correct |
21 |
Correct |
99 ms |
166264 KB |
Output is correct |
22 |
Correct |
102 ms |
166264 KB |
Output is correct |
23 |
Correct |
102 ms |
166264 KB |
Output is correct |
24 |
Correct |
101 ms |
166492 KB |
Output is correct |
25 |
Correct |
115 ms |
166392 KB |
Output is correct |
26 |
Correct |
109 ms |
166392 KB |
Output is correct |
27 |
Correct |
103 ms |
166392 KB |
Output is correct |
28 |
Correct |
101 ms |
166904 KB |
Output is correct |
29 |
Correct |
102 ms |
166904 KB |
Output is correct |
30 |
Correct |
102 ms |
166392 KB |
Output is correct |
31 |
Correct |
110 ms |
166648 KB |
Output is correct |
32 |
Correct |
110 ms |
166520 KB |
Output is correct |
33 |
Correct |
117 ms |
167288 KB |
Output is correct |
34 |
Correct |
107 ms |
167672 KB |
Output is correct |
35 |
Correct |
111 ms |
167416 KB |
Output is correct |
36 |
Correct |
103 ms |
166392 KB |
Output is correct |
37 |
Correct |
108 ms |
167924 KB |
Output is correct |
38 |
Correct |
117 ms |
168056 KB |
Output is correct |
39 |
Correct |
112 ms |
167924 KB |
Output is correct |
40 |
Correct |
114 ms |
167868 KB |
Output is correct |
41 |
Correct |
115 ms |
167876 KB |
Output is correct |
42 |
Correct |
116 ms |
167032 KB |
Output is correct |
43 |
Correct |
110 ms |
167032 KB |
Output is correct |
44 |
Correct |
112 ms |
167160 KB |
Output is correct |
45 |
Correct |
129 ms |
170452 KB |
Output is correct |
46 |
Correct |
129 ms |
170624 KB |
Output is correct |
47 |
Correct |
149 ms |
173532 KB |
Output is correct |
48 |
Correct |
109 ms |
167160 KB |
Output is correct |
49 |
Correct |
120 ms |
166776 KB |
Output is correct |
50 |
Correct |
103 ms |
166708 KB |
Output is correct |
51 |
Correct |
137 ms |
170360 KB |
Output is correct |
52 |
Correct |
128 ms |
170488 KB |
Output is correct |
53 |
Correct |
121 ms |
168344 KB |
Output is correct |
54 |
Correct |
100 ms |
166648 KB |
Output is correct |
55 |
Correct |
114 ms |
166904 KB |
Output is correct |
56 |
Correct |
112 ms |
168312 KB |
Output is correct |
57 |
Correct |
128 ms |
171000 KB |
Output is correct |
58 |
Correct |
113 ms |
168564 KB |
Output is correct |
59 |
Correct |
131 ms |
169588 KB |
Output is correct |
60 |
Correct |
122 ms |
169532 KB |
Output is correct |
61 |
Correct |
118 ms |
169336 KB |
Output is correct |
62 |
Correct |
163 ms |
181368 KB |
Output is correct |
63 |
Correct |
162 ms |
187184 KB |
Output is correct |
64 |
Correct |
170 ms |
191580 KB |
Output is correct |
65 |
Correct |
249 ms |
202148 KB |
Output is correct |
66 |
Correct |
396 ms |
228164 KB |
Output is correct |
67 |
Correct |
383 ms |
228468 KB |
Output is correct |