#include<bits/stdc++.h>
using namespace std;
const int nax = 3e4 + 3;
const int INF = 1e9;
int b[nax], p[nax];
vector<int>doges[nax];
map<pair<int,int>,int>dist;
int get(int x, int y) {
if(dist.count(make_pair(x, y))) return dist[{x, y}];
return INF;
}
void PlayGround() {
int n, m;
cin>>n>>m;
for(int i=0; i<m; ++i) {
cin>>b[i]>>p[i];
doges[b[i]].push_back(p[i]);
}
dist[{b[0], 0}] = 0;
queue<tuple<int,int,int>>q;
q.push({b[0], 0, 0});
while(!q.empty()) {
auto x = q.front();
q.pop();
int ss = get<0>(x);
int j = get<1>(x);
int d = get<2>(x);
if(d!=get(ss, j)) continue;
if(j==0) {
for(int z : doges[ss]) {
if(get(ss, z)>d) {
dist[{ss, z}] = d;
q.emplace(ss, z, d);
}
}
} else {
if(ss+j<n) {
if(get(ss+j, j)>d+1) {
dist[{ss+j, j}] = d+1;
q.emplace(ss+j, j, d+1);
}
if(get(ss+j, 0)>d+1) {
dist[{ss+j, 0}] = d+1;
q.emplace(ss+j, 0, d+1);
}
}
if(ss-j>=0) {
if(get(ss-j, j)>d+1) {
dist[{ss-j, j}] = d+1;
q.emplace(ss-j, j, d+1);
}
if(get(ss-j, 0)>d+1) {
dist[{ss-j, 0}] = d+1;
q.emplace(ss-j, 0, d+1);
}
}
}
}
int ans = get(b[1], 0);
if(ans==INF) ans = -1;
cout<<ans<<'\n';
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
PlayGround();
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
1032 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
8 |
Correct |
1 ms |
1032 KB |
Output is correct |
9 |
Correct |
2 ms |
980 KB |
Output is correct |
10 |
Correct |
2 ms |
1108 KB |
Output is correct |
11 |
Correct |
5 ms |
1364 KB |
Output is correct |
12 |
Correct |
1 ms |
1108 KB |
Output is correct |
13 |
Correct |
1 ms |
1060 KB |
Output is correct |
14 |
Correct |
5 ms |
1424 KB |
Output is correct |
15 |
Correct |
5 ms |
1424 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
1004 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
1032 KB |
Output is correct |
6 |
Correct |
1 ms |
1040 KB |
Output is correct |
7 |
Correct |
1 ms |
1028 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
980 KB |
Output is correct |
10 |
Correct |
2 ms |
1108 KB |
Output is correct |
11 |
Correct |
4 ms |
1236 KB |
Output is correct |
12 |
Correct |
1 ms |
980 KB |
Output is correct |
13 |
Correct |
1 ms |
980 KB |
Output is correct |
14 |
Correct |
6 ms |
1428 KB |
Output is correct |
15 |
Correct |
5 ms |
1364 KB |
Output is correct |
16 |
Correct |
1 ms |
980 KB |
Output is correct |
17 |
Correct |
17 ms |
2048 KB |
Output is correct |
18 |
Correct |
1 ms |
980 KB |
Output is correct |
19 |
Correct |
1 ms |
980 KB |
Output is correct |
20 |
Correct |
2 ms |
1364 KB |
Output is correct |
21 |
Correct |
1 ms |
980 KB |
Output is correct |
22 |
Correct |
1 ms |
980 KB |
Output is correct |
23 |
Correct |
7 ms |
1556 KB |
Output is correct |
24 |
Correct |
17 ms |
1888 KB |
Output is correct |
25 |
Correct |
8 ms |
1704 KB |
Output is correct |
26 |
Correct |
8 ms |
1692 KB |
Output is correct |
27 |
Correct |
6 ms |
1620 KB |
Output is correct |
28 |
Correct |
22 ms |
2608 KB |
Output is correct |
29 |
Correct |
74 ms |
4984 KB |
Output is correct |
30 |
Correct |
17 ms |
2132 KB |
Output is correct |
31 |
Correct |
39 ms |
3144 KB |
Output is correct |
32 |
Correct |
24 ms |
2652 KB |
Output is correct |
33 |
Correct |
184 ms |
8688 KB |
Output is correct |
34 |
Correct |
179 ms |
8592 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
1040 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
980 KB |
Output is correct |
10 |
Correct |
2 ms |
1108 KB |
Output is correct |
11 |
Correct |
5 ms |
1320 KB |
Output is correct |
12 |
Correct |
1 ms |
980 KB |
Output is correct |
13 |
Correct |
1 ms |
1040 KB |
Output is correct |
14 |
Correct |
5 ms |
1364 KB |
Output is correct |
15 |
Correct |
5 ms |
1364 KB |
Output is correct |
16 |
Correct |
1 ms |
980 KB |
Output is correct |
17 |
Correct |
20 ms |
2032 KB |
Output is correct |
18 |
Correct |
1 ms |
980 KB |
Output is correct |
19 |
Correct |
1 ms |
980 KB |
Output is correct |
20 |
Correct |
3 ms |
1304 KB |
Output is correct |
21 |
Correct |
2 ms |
980 KB |
Output is correct |
22 |
Correct |
1 ms |
980 KB |
Output is correct |
23 |
Correct |
8 ms |
1552 KB |
Output is correct |
24 |
Correct |
16 ms |
2004 KB |
Output is correct |
25 |
Correct |
8 ms |
1620 KB |
Output is correct |
26 |
Correct |
8 ms |
1620 KB |
Output is correct |
27 |
Correct |
7 ms |
1620 KB |
Output is correct |
28 |
Correct |
23 ms |
2608 KB |
Output is correct |
29 |
Correct |
78 ms |
4896 KB |
Output is correct |
30 |
Correct |
18 ms |
2188 KB |
Output is correct |
31 |
Correct |
37 ms |
3196 KB |
Output is correct |
32 |
Correct |
24 ms |
2564 KB |
Output is correct |
33 |
Correct |
175 ms |
8692 KB |
Output is correct |
34 |
Correct |
177 ms |
8712 KB |
Output is correct |
35 |
Correct |
136 ms |
8140 KB |
Output is correct |
36 |
Correct |
20 ms |
2308 KB |
Output is correct |
37 |
Correct |
288 ms |
12288 KB |
Output is correct |
38 |
Correct |
264 ms |
11876 KB |
Output is correct |
39 |
Correct |
284 ms |
11876 KB |
Output is correct |
40 |
Correct |
256 ms |
11920 KB |
Output is correct |
41 |
Correct |
274 ms |
11968 KB |
Output is correct |
42 |
Correct |
12 ms |
2136 KB |
Output is correct |
43 |
Correct |
12 ms |
2016 KB |
Output is correct |
44 |
Correct |
9 ms |
1876 KB |
Output is correct |
45 |
Execution timed out |
1082 ms |
31812 KB |
Time limit exceeded |
46 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
980 KB |
Output is correct |
2 |
Correct |
1 ms |
980 KB |
Output is correct |
3 |
Correct |
1 ms |
980 KB |
Output is correct |
4 |
Correct |
1 ms |
980 KB |
Output is correct |
5 |
Correct |
1 ms |
980 KB |
Output is correct |
6 |
Correct |
1 ms |
980 KB |
Output is correct |
7 |
Correct |
1 ms |
980 KB |
Output is correct |
8 |
Correct |
1 ms |
980 KB |
Output is correct |
9 |
Correct |
1 ms |
980 KB |
Output is correct |
10 |
Correct |
2 ms |
1108 KB |
Output is correct |
11 |
Correct |
4 ms |
1236 KB |
Output is correct |
12 |
Correct |
1 ms |
980 KB |
Output is correct |
13 |
Correct |
1 ms |
1024 KB |
Output is correct |
14 |
Correct |
5 ms |
1364 KB |
Output is correct |
15 |
Correct |
5 ms |
1364 KB |
Output is correct |
16 |
Correct |
1 ms |
980 KB |
Output is correct |
17 |
Correct |
17 ms |
1976 KB |
Output is correct |
18 |
Correct |
1 ms |
980 KB |
Output is correct |
19 |
Correct |
1 ms |
980 KB |
Output is correct |
20 |
Correct |
4 ms |
1364 KB |
Output is correct |
21 |
Correct |
1 ms |
1040 KB |
Output is correct |
22 |
Correct |
1 ms |
980 KB |
Output is correct |
23 |
Correct |
9 ms |
1556 KB |
Output is correct |
24 |
Correct |
17 ms |
2004 KB |
Output is correct |
25 |
Correct |
8 ms |
1604 KB |
Output is correct |
26 |
Correct |
8 ms |
1620 KB |
Output is correct |
27 |
Correct |
6 ms |
1524 KB |
Output is correct |
28 |
Correct |
22 ms |
2632 KB |
Output is correct |
29 |
Correct |
76 ms |
4980 KB |
Output is correct |
30 |
Correct |
17 ms |
2184 KB |
Output is correct |
31 |
Correct |
35 ms |
3172 KB |
Output is correct |
32 |
Correct |
24 ms |
2616 KB |
Output is correct |
33 |
Correct |
181 ms |
8648 KB |
Output is correct |
34 |
Correct |
176 ms |
8708 KB |
Output is correct |
35 |
Correct |
139 ms |
8080 KB |
Output is correct |
36 |
Correct |
22 ms |
2260 KB |
Output is correct |
37 |
Correct |
359 ms |
12368 KB |
Output is correct |
38 |
Correct |
271 ms |
11916 KB |
Output is correct |
39 |
Correct |
296 ms |
11836 KB |
Output is correct |
40 |
Correct |
263 ms |
11904 KB |
Output is correct |
41 |
Correct |
275 ms |
11904 KB |
Output is correct |
42 |
Correct |
12 ms |
2164 KB |
Output is correct |
43 |
Correct |
11 ms |
2072 KB |
Output is correct |
44 |
Correct |
9 ms |
1816 KB |
Output is correct |
45 |
Execution timed out |
1034 ms |
31856 KB |
Time limit exceeded |
46 |
Halted |
0 ms |
0 KB |
- |