#include "bits/stdc++.h"
using namespace std;
using ll = long long;
const int maxn=3e4+5;
const int B = 180;
int n,m;
int b[maxn],p[maxn];
int ver[maxn][B];
int dis[maxn * B];
bool vis[maxn * B];
vector<pair<int,int>>E[maxn * B];
int main(){
ios::sync_with_stdio(false);
cin.tie(0);
cin >> n >> m;
int sq = sqrt(n) + 2;
int sz = n - 1;
for(int i = 0;i < n;i++) for(int j = 1;j <= sq;j++) ver[i][j] = ++sz;
for(int i = 0;i < n;i++){
for(int j = 1;j <= sq;j++){
E[ver[i][j]].push_back({i,0});
// E[i].push_back({ver[i][j],0});
if(i - j >= 0) E[ver[i][j]].push_back({ver[i-j][j],1});
if(i + j < n) E[ver[i][j]].push_back({ver[i+j][j],1});
}
}
for(int i = 0;i < m;i++){
cin >> b[i] >> p[i];
if(p[i] <= sq){
E[b[i]].push_back({ver[b[i]][p[i]],0});
E[ver[b[i]][p[i]]].push_back({b[i],0});
}
else {
for(int j = 1;b[i] - j * p[i] >= 0;j++) E[b[i]].push_back({b[i] - j * p[i],j});
for(int j = 1;b[i] + j * p[i] < n;j++) E[b[i]].push_back({b[i] + j * p[i],j});
}
}
// cout<<E[22][0].first<<' '<<E[22][0].second<<'\n';
for(int i = 0;i <= sz;i++) dis[i] = 1e9;
dis[b[0]] = 0;
priority_queue<pair<int,int>>q;
q.push({0,b[0]});
while(!q.empty()){
int x = q.top().second;
q.pop();
if(vis[x]) continue;
vis[x] = 1;
// cout<<x<<'\n';
for(auto i : E[x]){
if(dis[i.first] > dis[x] + i.second){
dis[i.first] = dis[x] + i.second;
q.push({-dis[i.first],i.first});
}
}
}
if(dis[b[1]] == 1e9) cout<<-1;
else cout<<dis[b[1]];
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
64 ms |
127196 KB |
Output is correct |
2 |
Correct |
61 ms |
127052 KB |
Output is correct |
3 |
Correct |
62 ms |
127076 KB |
Output is correct |
4 |
Correct |
69 ms |
127052 KB |
Output is correct |
5 |
Correct |
67 ms |
127052 KB |
Output is correct |
6 |
Correct |
63 ms |
127116 KB |
Output is correct |
7 |
Correct |
66 ms |
127160 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
64 ms |
127052 KB |
Output is correct |
2 |
Correct |
63 ms |
127088 KB |
Output is correct |
3 |
Correct |
63 ms |
127048 KB |
Output is correct |
4 |
Correct |
61 ms |
127124 KB |
Output is correct |
5 |
Correct |
64 ms |
127112 KB |
Output is correct |
6 |
Correct |
61 ms |
127172 KB |
Output is correct |
7 |
Correct |
66 ms |
127148 KB |
Output is correct |
8 |
Correct |
62 ms |
127128 KB |
Output is correct |
9 |
Correct |
64 ms |
127176 KB |
Output is correct |
10 |
Correct |
65 ms |
127288 KB |
Output is correct |
11 |
Correct |
72 ms |
127348 KB |
Output is correct |
12 |
Correct |
63 ms |
127332 KB |
Output is correct |
13 |
Correct |
63 ms |
127272 KB |
Output is correct |
14 |
Correct |
68 ms |
127336 KB |
Output is correct |
15 |
Correct |
63 ms |
127308 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
62 ms |
127052 KB |
Output is correct |
2 |
Correct |
64 ms |
127056 KB |
Output is correct |
3 |
Correct |
63 ms |
127100 KB |
Output is correct |
4 |
Correct |
63 ms |
127080 KB |
Output is correct |
5 |
Correct |
62 ms |
127152 KB |
Output is correct |
6 |
Correct |
62 ms |
127120 KB |
Output is correct |
7 |
Correct |
66 ms |
127104 KB |
Output is correct |
8 |
Correct |
64 ms |
127212 KB |
Output is correct |
9 |
Correct |
63 ms |
127192 KB |
Output is correct |
10 |
Correct |
64 ms |
127400 KB |
Output is correct |
11 |
Correct |
62 ms |
127404 KB |
Output is correct |
12 |
Correct |
64 ms |
127504 KB |
Output is correct |
13 |
Correct |
63 ms |
127276 KB |
Output is correct |
14 |
Correct |
63 ms |
127288 KB |
Output is correct |
15 |
Correct |
62 ms |
127252 KB |
Output is correct |
16 |
Correct |
63 ms |
127432 KB |
Output is correct |
17 |
Correct |
71 ms |
128872 KB |
Output is correct |
18 |
Correct |
73 ms |
132296 KB |
Output is correct |
19 |
Correct |
75 ms |
133160 KB |
Output is correct |
20 |
Correct |
76 ms |
133332 KB |
Output is correct |
21 |
Correct |
73 ms |
127872 KB |
Output is correct |
22 |
Correct |
81 ms |
132376 KB |
Output is correct |
23 |
Correct |
71 ms |
131640 KB |
Output is correct |
24 |
Correct |
76 ms |
133060 KB |
Output is correct |
25 |
Correct |
74 ms |
133324 KB |
Output is correct |
26 |
Correct |
86 ms |
133376 KB |
Output is correct |
27 |
Correct |
75 ms |
133312 KB |
Output is correct |
28 |
Correct |
79 ms |
133432 KB |
Output is correct |
29 |
Correct |
84 ms |
133372 KB |
Output is correct |
30 |
Correct |
77 ms |
133216 KB |
Output is correct |
31 |
Correct |
78 ms |
133284 KB |
Output is correct |
32 |
Correct |
85 ms |
133452 KB |
Output is correct |
33 |
Correct |
91 ms |
133984 KB |
Output is correct |
34 |
Correct |
86 ms |
133836 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
67 ms |
127148 KB |
Output is correct |
2 |
Correct |
62 ms |
127168 KB |
Output is correct |
3 |
Correct |
63 ms |
127164 KB |
Output is correct |
4 |
Correct |
62 ms |
127140 KB |
Output is correct |
5 |
Correct |
70 ms |
127084 KB |
Output is correct |
6 |
Correct |
64 ms |
127176 KB |
Output is correct |
7 |
Correct |
65 ms |
127228 KB |
Output is correct |
8 |
Correct |
63 ms |
127144 KB |
Output is correct |
9 |
Correct |
63 ms |
127232 KB |
Output is correct |
10 |
Correct |
64 ms |
127260 KB |
Output is correct |
11 |
Correct |
64 ms |
127308 KB |
Output is correct |
12 |
Correct |
63 ms |
127376 KB |
Output is correct |
13 |
Correct |
63 ms |
127308 KB |
Output is correct |
14 |
Correct |
63 ms |
127368 KB |
Output is correct |
15 |
Correct |
63 ms |
127356 KB |
Output is correct |
16 |
Correct |
65 ms |
127472 KB |
Output is correct |
17 |
Correct |
69 ms |
128896 KB |
Output is correct |
18 |
Correct |
71 ms |
132252 KB |
Output is correct |
19 |
Correct |
75 ms |
133232 KB |
Output is correct |
20 |
Correct |
72 ms |
133420 KB |
Output is correct |
21 |
Correct |
63 ms |
127892 KB |
Output is correct |
22 |
Correct |
74 ms |
132352 KB |
Output is correct |
23 |
Correct |
71 ms |
131700 KB |
Output is correct |
24 |
Correct |
83 ms |
133212 KB |
Output is correct |
25 |
Correct |
76 ms |
133388 KB |
Output is correct |
26 |
Correct |
77 ms |
133332 KB |
Output is correct |
27 |
Correct |
78 ms |
133412 KB |
Output is correct |
28 |
Correct |
75 ms |
133400 KB |
Output is correct |
29 |
Correct |
82 ms |
133320 KB |
Output is correct |
30 |
Correct |
77 ms |
133288 KB |
Output is correct |
31 |
Correct |
82 ms |
133384 KB |
Output is correct |
32 |
Correct |
79 ms |
133448 KB |
Output is correct |
33 |
Correct |
90 ms |
133912 KB |
Output is correct |
34 |
Correct |
86 ms |
133928 KB |
Output is correct |
35 |
Correct |
81 ms |
132172 KB |
Output is correct |
36 |
Correct |
67 ms |
129964 KB |
Output is correct |
37 |
Correct |
90 ms |
134976 KB |
Output is correct |
38 |
Correct |
92 ms |
134964 KB |
Output is correct |
39 |
Correct |
91 ms |
134880 KB |
Output is correct |
40 |
Correct |
93 ms |
134884 KB |
Output is correct |
41 |
Correct |
93 ms |
135000 KB |
Output is correct |
42 |
Correct |
80 ms |
134448 KB |
Output is correct |
43 |
Correct |
80 ms |
134412 KB |
Output is correct |
44 |
Correct |
80 ms |
134392 KB |
Output is correct |
45 |
Correct |
96 ms |
137648 KB |
Output is correct |
46 |
Correct |
98 ms |
137820 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
63 ms |
127248 KB |
Output is correct |
2 |
Correct |
62 ms |
127052 KB |
Output is correct |
3 |
Correct |
61 ms |
127076 KB |
Output is correct |
4 |
Correct |
62 ms |
127096 KB |
Output is correct |
5 |
Correct |
62 ms |
127108 KB |
Output is correct |
6 |
Correct |
68 ms |
127132 KB |
Output is correct |
7 |
Correct |
62 ms |
127140 KB |
Output is correct |
8 |
Correct |
64 ms |
127180 KB |
Output is correct |
9 |
Correct |
63 ms |
127180 KB |
Output is correct |
10 |
Correct |
62 ms |
127312 KB |
Output is correct |
11 |
Correct |
63 ms |
127308 KB |
Output is correct |
12 |
Correct |
62 ms |
127308 KB |
Output is correct |
13 |
Correct |
63 ms |
127348 KB |
Output is correct |
14 |
Correct |
66 ms |
127288 KB |
Output is correct |
15 |
Correct |
62 ms |
127376 KB |
Output is correct |
16 |
Correct |
64 ms |
127404 KB |
Output is correct |
17 |
Correct |
65 ms |
128860 KB |
Output is correct |
18 |
Correct |
75 ms |
132240 KB |
Output is correct |
19 |
Correct |
76 ms |
133208 KB |
Output is correct |
20 |
Correct |
79 ms |
133412 KB |
Output is correct |
21 |
Correct |
71 ms |
127820 KB |
Output is correct |
22 |
Correct |
73 ms |
132364 KB |
Output is correct |
23 |
Correct |
72 ms |
131620 KB |
Output is correct |
24 |
Correct |
76 ms |
132976 KB |
Output is correct |
25 |
Correct |
75 ms |
133332 KB |
Output is correct |
26 |
Correct |
80 ms |
133404 KB |
Output is correct |
27 |
Correct |
77 ms |
133424 KB |
Output is correct |
28 |
Correct |
87 ms |
133360 KB |
Output is correct |
29 |
Correct |
96 ms |
133296 KB |
Output is correct |
30 |
Correct |
79 ms |
133268 KB |
Output is correct |
31 |
Correct |
77 ms |
133384 KB |
Output is correct |
32 |
Correct |
84 ms |
133404 KB |
Output is correct |
33 |
Correct |
87 ms |
133916 KB |
Output is correct |
34 |
Correct |
86 ms |
133852 KB |
Output is correct |
35 |
Correct |
83 ms |
132044 KB |
Output is correct |
36 |
Correct |
82 ms |
130036 KB |
Output is correct |
37 |
Correct |
89 ms |
134776 KB |
Output is correct |
38 |
Correct |
94 ms |
134892 KB |
Output is correct |
39 |
Correct |
90 ms |
134976 KB |
Output is correct |
40 |
Correct |
90 ms |
134956 KB |
Output is correct |
41 |
Correct |
97 ms |
134988 KB |
Output is correct |
42 |
Correct |
84 ms |
134440 KB |
Output is correct |
43 |
Correct |
78 ms |
134316 KB |
Output is correct |
44 |
Correct |
79 ms |
134404 KB |
Output is correct |
45 |
Correct |
94 ms |
137632 KB |
Output is correct |
46 |
Correct |
99 ms |
137856 KB |
Output is correct |
47 |
Correct |
384 ms |
212960 KB |
Output is correct |
48 |
Runtime error |
325 ms |
262144 KB |
Execution killed with signal 9 |
49 |
Halted |
0 ms |
0 KB |
- |