#include<bits/stdc++.h>
using namespace std;
#ifdef sus
const int N=100, S=3;
#else
const int N=3e4+10, S=80;
#endif
int n, m, b[N], p[N], heavy[N];
int f[N][S+1];
vector<pair<pair<int, int>, int>> g[N][S+1];
int32_t main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> m;
for (int i=1; i<=m; ++i) cin >> b[i] >> p[i], heavy[i]=p[i]>=S, ++b[i];
for (int i=1; i<=m; ++i) if (heavy[i]){
for (int l=b[i]-p[i], r=b[i]+p[i], cnt=1; l>=1 || r<=n; l-=p[i], r+=p[i], ++cnt){
if (l>=1) g[b[i]][S].push_back({{l, S}, cnt});
if (r<=n) g[b[i]][S].push_back({{r, S}, cnt});
}
for (int j=1; j<S; ++j) g[b[i]][j].push_back({{b[i], S}, 0});
}
for (int i=1; i<=m; ++i) if (!heavy[i]){
for (int j=1; j<=S; ++j) if (j!=p[i]) g[b[i]][j].push_back({{b[i], p[i]}, 0});
}
for (int i=1; i<=n; ++i) for (int j=1; j<S; ++j){
if (i-j>=1) g[i][j].push_back({{i-j, j}, 1});
if (i+j<=n) g[i][j].push_back({{i+j, j}, 1});
}
priority_queue<pair<int, pair<int, int>>, vector<pair<int, pair<int, int>>>, greater<pair<int, pair<int, int>>>> pq;
memset(f, 0x3f, sizeof f);
pq.push({f[b[1]][min(S, p[1])]=0, {b[1], min(S, p[1])}});
while (pq.size()){
auto u=pq.top().second;
int d=pq.top().first;
pq.pop();
if (f[u.first][u.second]!=d) continue;
for (auto &e:g[u.first][u.second]){
auto v=e.first; int w=e.second;
if (f[v.first][v.second]>d+w) pq.emplace(f[v.first][v.second]=d+w, v);
}
}
int ans=*min_element(f[b[2]]+1, f[b[2]]+S+1);
if (ans>1e9) ans=-1;
cout << ans << '\n';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
34 ms |
66816 KB |
Output is correct |
2 |
Correct |
18 ms |
66908 KB |
Output is correct |
3 |
Correct |
17 ms |
66908 KB |
Output is correct |
4 |
Correct |
15 ms |
66976 KB |
Output is correct |
5 |
Correct |
16 ms |
66908 KB |
Output is correct |
6 |
Correct |
16 ms |
66956 KB |
Output is correct |
7 |
Correct |
15 ms |
66904 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
66908 KB |
Output is correct |
2 |
Correct |
15 ms |
66908 KB |
Output is correct |
3 |
Correct |
15 ms |
66908 KB |
Output is correct |
4 |
Correct |
15 ms |
66904 KB |
Output is correct |
5 |
Correct |
15 ms |
67160 KB |
Output is correct |
6 |
Correct |
15 ms |
66904 KB |
Output is correct |
7 |
Correct |
17 ms |
67072 KB |
Output is correct |
8 |
Correct |
16 ms |
67124 KB |
Output is correct |
9 |
Correct |
16 ms |
67164 KB |
Output is correct |
10 |
Correct |
17 ms |
67848 KB |
Output is correct |
11 |
Correct |
24 ms |
69980 KB |
Output is correct |
12 |
Correct |
18 ms |
69212 KB |
Output is correct |
13 |
Correct |
18 ms |
69212 KB |
Output is correct |
14 |
Correct |
21 ms |
69908 KB |
Output is correct |
15 |
Correct |
24 ms |
69720 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
66908 KB |
Output is correct |
2 |
Correct |
17 ms |
67068 KB |
Output is correct |
3 |
Correct |
15 ms |
66908 KB |
Output is correct |
4 |
Correct |
15 ms |
66908 KB |
Output is correct |
5 |
Correct |
16 ms |
66824 KB |
Output is correct |
6 |
Correct |
16 ms |
66908 KB |
Output is correct |
7 |
Correct |
15 ms |
66820 KB |
Output is correct |
8 |
Correct |
15 ms |
66940 KB |
Output is correct |
9 |
Correct |
15 ms |
67164 KB |
Output is correct |
10 |
Correct |
17 ms |
68004 KB |
Output is correct |
11 |
Correct |
21 ms |
69980 KB |
Output is correct |
12 |
Correct |
18 ms |
69212 KB |
Output is correct |
13 |
Correct |
18 ms |
69396 KB |
Output is correct |
14 |
Correct |
21 ms |
69752 KB |
Output is correct |
15 |
Correct |
20 ms |
69724 KB |
Output is correct |
16 |
Correct |
18 ms |
68696 KB |
Output is correct |
17 |
Correct |
27 ms |
71772 KB |
Output is correct |
18 |
Correct |
27 ms |
73304 KB |
Output is correct |
19 |
Correct |
32 ms |
73132 KB |
Output is correct |
20 |
Correct |
35 ms |
76632 KB |
Output is correct |
21 |
Correct |
24 ms |
69724 KB |
Output is correct |
22 |
Correct |
26 ms |
72912 KB |
Output is correct |
23 |
Correct |
34 ms |
72868 KB |
Output is correct |
24 |
Correct |
33 ms |
75124 KB |
Output is correct |
25 |
Correct |
32 ms |
75604 KB |
Output is correct |
26 |
Correct |
30 ms |
74064 KB |
Output is correct |
27 |
Correct |
29 ms |
73912 KB |
Output is correct |
28 |
Correct |
37 ms |
76888 KB |
Output is correct |
29 |
Correct |
37 ms |
72796 KB |
Output is correct |
30 |
Correct |
28 ms |
72028 KB |
Output is correct |
31 |
Correct |
38 ms |
72872 KB |
Output is correct |
32 |
Correct |
33 ms |
72540 KB |
Output is correct |
33 |
Correct |
47 ms |
74412 KB |
Output is correct |
34 |
Correct |
46 ms |
74584 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
16 ms |
66904 KB |
Output is correct |
2 |
Correct |
15 ms |
67068 KB |
Output is correct |
3 |
Correct |
15 ms |
66948 KB |
Output is correct |
4 |
Correct |
15 ms |
66908 KB |
Output is correct |
5 |
Correct |
15 ms |
66916 KB |
Output is correct |
6 |
Correct |
15 ms |
66904 KB |
Output is correct |
7 |
Correct |
15 ms |
66908 KB |
Output is correct |
8 |
Correct |
15 ms |
66936 KB |
Output is correct |
9 |
Correct |
16 ms |
67160 KB |
Output is correct |
10 |
Correct |
16 ms |
67856 KB |
Output is correct |
11 |
Correct |
21 ms |
69976 KB |
Output is correct |
12 |
Correct |
19 ms |
69188 KB |
Output is correct |
13 |
Correct |
18 ms |
69212 KB |
Output is correct |
14 |
Correct |
21 ms |
69724 KB |
Output is correct |
15 |
Correct |
23 ms |
69724 KB |
Output is correct |
16 |
Correct |
20 ms |
68760 KB |
Output is correct |
17 |
Correct |
25 ms |
71768 KB |
Output is correct |
18 |
Correct |
27 ms |
73128 KB |
Output is correct |
19 |
Correct |
27 ms |
73052 KB |
Output is correct |
20 |
Correct |
34 ms |
76636 KB |
Output is correct |
21 |
Correct |
20 ms |
69688 KB |
Output is correct |
22 |
Correct |
25 ms |
72796 KB |
Output is correct |
23 |
Correct |
26 ms |
72940 KB |
Output is correct |
24 |
Correct |
36 ms |
75096 KB |
Output is correct |
25 |
Correct |
34 ms |
75936 KB |
Output is correct |
26 |
Correct |
29 ms |
74076 KB |
Output is correct |
27 |
Correct |
29 ms |
74132 KB |
Output is correct |
28 |
Correct |
38 ms |
76868 KB |
Output is correct |
29 |
Correct |
36 ms |
72796 KB |
Output is correct |
30 |
Correct |
29 ms |
72256 KB |
Output is correct |
31 |
Correct |
38 ms |
72788 KB |
Output is correct |
32 |
Correct |
35 ms |
72644 KB |
Output is correct |
33 |
Correct |
46 ms |
74580 KB |
Output is correct |
34 |
Correct |
47 ms |
74428 KB |
Output is correct |
35 |
Correct |
103 ms |
108368 KB |
Output is correct |
36 |
Correct |
38 ms |
76752 KB |
Output is correct |
37 |
Correct |
131 ms |
100960 KB |
Output is correct |
38 |
Correct |
139 ms |
117420 KB |
Output is correct |
39 |
Correct |
138 ms |
117100 KB |
Output is correct |
40 |
Correct |
140 ms |
117584 KB |
Output is correct |
41 |
Correct |
143 ms |
117616 KB |
Output is correct |
42 |
Correct |
64 ms |
100868 KB |
Output is correct |
43 |
Correct |
64 ms |
100892 KB |
Output is correct |
44 |
Correct |
78 ms |
104304 KB |
Output is correct |
45 |
Correct |
124 ms |
114912 KB |
Output is correct |
46 |
Correct |
120 ms |
115100 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
15 ms |
67072 KB |
Output is correct |
2 |
Correct |
18 ms |
66908 KB |
Output is correct |
3 |
Correct |
17 ms |
66908 KB |
Output is correct |
4 |
Correct |
17 ms |
66908 KB |
Output is correct |
5 |
Correct |
16 ms |
66908 KB |
Output is correct |
6 |
Correct |
15 ms |
67076 KB |
Output is correct |
7 |
Correct |
16 ms |
67024 KB |
Output is correct |
8 |
Correct |
15 ms |
66908 KB |
Output is correct |
9 |
Correct |
15 ms |
66988 KB |
Output is correct |
10 |
Correct |
17 ms |
67676 KB |
Output is correct |
11 |
Correct |
21 ms |
70232 KB |
Output is correct |
12 |
Correct |
18 ms |
69064 KB |
Output is correct |
13 |
Correct |
18 ms |
69196 KB |
Output is correct |
14 |
Correct |
20 ms |
69724 KB |
Output is correct |
15 |
Correct |
20 ms |
69724 KB |
Output is correct |
16 |
Correct |
18 ms |
68700 KB |
Output is correct |
17 |
Correct |
27 ms |
71772 KB |
Output is correct |
18 |
Correct |
27 ms |
73300 KB |
Output is correct |
19 |
Correct |
26 ms |
73048 KB |
Output is correct |
20 |
Correct |
43 ms |
76624 KB |
Output is correct |
21 |
Correct |
22 ms |
69720 KB |
Output is correct |
22 |
Correct |
26 ms |
72784 KB |
Output is correct |
23 |
Correct |
27 ms |
72796 KB |
Output is correct |
24 |
Correct |
33 ms |
75092 KB |
Output is correct |
25 |
Correct |
34 ms |
75460 KB |
Output is correct |
26 |
Correct |
29 ms |
74288 KB |
Output is correct |
27 |
Correct |
29 ms |
74076 KB |
Output is correct |
28 |
Correct |
41 ms |
76704 KB |
Output is correct |
29 |
Correct |
42 ms |
72796 KB |
Output is correct |
30 |
Correct |
29 ms |
72280 KB |
Output is correct |
31 |
Correct |
32 ms |
72792 KB |
Output is correct |
32 |
Correct |
31 ms |
72540 KB |
Output is correct |
33 |
Correct |
47 ms |
74588 KB |
Output is correct |
34 |
Correct |
53 ms |
74588 KB |
Output is correct |
35 |
Correct |
106 ms |
108372 KB |
Output is correct |
36 |
Correct |
35 ms |
76892 KB |
Output is correct |
37 |
Correct |
118 ms |
100732 KB |
Output is correct |
38 |
Correct |
134 ms |
117240 KB |
Output is correct |
39 |
Correct |
146 ms |
117064 KB |
Output is correct |
40 |
Correct |
141 ms |
117588 KB |
Output is correct |
41 |
Correct |
144 ms |
117332 KB |
Output is correct |
42 |
Correct |
65 ms |
100868 KB |
Output is correct |
43 |
Correct |
70 ms |
101124 KB |
Output is correct |
44 |
Correct |
81 ms |
104408 KB |
Output is correct |
45 |
Correct |
116 ms |
114700 KB |
Output is correct |
46 |
Correct |
116 ms |
115016 KB |
Output is correct |
47 |
Correct |
344 ms |
146448 KB |
Output is correct |
48 |
Correct |
213 ms |
168244 KB |
Output is correct |
49 |
Correct |
230 ms |
172292 KB |
Output is correct |
50 |
Correct |
211 ms |
167508 KB |
Output is correct |
51 |
Correct |
351 ms |
200244 KB |
Output is correct |
52 |
Correct |
368 ms |
200916 KB |
Output is correct |
53 |
Correct |
299 ms |
197492 KB |
Output is correct |
54 |
Correct |
155 ms |
141136 KB |
Output is correct |
55 |
Correct |
160 ms |
141136 KB |
Output is correct |
56 |
Correct |
311 ms |
216660 KB |
Output is correct |
57 |
Correct |
348 ms |
146752 KB |
Output is correct |
58 |
Correct |
225 ms |
170136 KB |
Output is correct |
59 |
Correct |
218 ms |
170220 KB |
Output is correct |
60 |
Correct |
249 ms |
171488 KB |
Output is correct |
61 |
Correct |
237 ms |
172096 KB |
Output is correct |
62 |
Correct |
404 ms |
220236 KB |
Output is correct |
63 |
Correct |
335 ms |
216496 KB |
Output is correct |
64 |
Correct |
309 ms |
219736 KB |
Output is correct |
65 |
Correct |
353 ms |
238188 KB |
Output is correct |
66 |
Correct |
739 ms |
243780 KB |
Output is correct |
67 |
Correct |
739 ms |
242444 KB |
Output is correct |