#include <iostream>
#include <vector>
#include <queue>
#include <tuple>
using namespace std;
const int INF = 1e9;
const int BLK = 700;
int n, m;
vector<int> b, p;
vector<vector<int>> v;
int f(int x, int c, int y) {
return x + c * y;
}
void addDoge(int i, int pos, int d, vector<vector<int>> &dist, priority_queue<tuple<int, int, int>> &q) {
if (p[i] < BLK) {
dist[pos][p[i]] = min(dist[pos][p[i]], -d);
q.push(make_tuple(d, pos, p[i]));
} else {
int l = b[i] - p[i], r = b[i] + p[i], x = 1;
while (l >= 0 or r < n) {
if (l >= 0) {
dist[l][0] = min(dist[l][0], -d + x);
q.push(make_tuple(d - x, l, 0));
}
if (r < n) {
dist[r][0] = min(dist[r][0], -d + x);
q.push(make_tuple(d - x, r, 0));
}
l -= p[i];
r += p[i];
x++;
}
}
}
int solve() {
vector<vector<int>> dist(n, vector<int>(BLK, INF));
priority_queue<tuple<int, int, int>> q;
dist[b[0]][p[0]] = 0;
q.push(make_tuple(0, b[0], p[0]));
while (not q.empty()) {
auto [d, pos, power] = q.top();
q.pop();
if (dist[pos][power] != -d) continue;
while (not v[pos].empty()) {
addDoge(v[pos].back(), pos, d, dist, q);
v[pos].pop_back();
}
if (pos + power < n) {
dist[pos + power][power] = min(dist[pos + power][power], -d + 1);
q.push(make_tuple(d - 1, pos + power, power));
}
if (pos - power >= 0) {
dist[pos - power][power] = min(dist[pos - power][power], -d + 1);
q.push(make_tuple(d - 1, pos - power, power));
}
}
int ret = INF;
for (int i = 0; i < BLK; i++) {
ret = min(ret, dist[b[1]][i]);
}
return ret == INF ? -1 : ret;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cin >> n >> m;
v.resize(n), b.resize(m), p.resize(m);
cin >> b[0] >> p[0];
for (int i = 1; i < m; i++) {
cin >> b[i] >> p[i];
v[b[i]].push_back(i);
}
cout << solve() << '\n';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
344 KB |
Output is correct |
4 |
Correct |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
1 ms |
348 KB |
Output is correct |
4 |
Correct |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
604 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
2 ms |
600 KB |
Output is correct |
12 |
Correct |
29 ms |
860 KB |
Output is correct |
13 |
Correct |
2 ms |
604 KB |
Output is correct |
14 |
Correct |
2 ms |
604 KB |
Output is correct |
15 |
Correct |
2 ms |
604 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
1 ms |
604 KB |
Output is correct |
10 |
Correct |
1 ms |
600 KB |
Output is correct |
11 |
Correct |
2 ms |
604 KB |
Output is correct |
12 |
Correct |
29 ms |
860 KB |
Output is correct |
13 |
Correct |
2 ms |
608 KB |
Output is correct |
14 |
Correct |
2 ms |
604 KB |
Output is correct |
15 |
Correct |
2 ms |
604 KB |
Output is correct |
16 |
Correct |
1 ms |
860 KB |
Output is correct |
17 |
Correct |
4 ms |
2528 KB |
Output is correct |
18 |
Correct |
2 ms |
5212 KB |
Output is correct |
19 |
Correct |
2 ms |
5980 KB |
Output is correct |
20 |
Correct |
298 ms |
6184 KB |
Output is correct |
21 |
Correct |
1 ms |
1372 KB |
Output is correct |
22 |
Correct |
2 ms |
5468 KB |
Output is correct |
23 |
Correct |
3 ms |
4956 KB |
Output is correct |
24 |
Correct |
5 ms |
5724 KB |
Output is correct |
25 |
Correct |
3 ms |
5976 KB |
Output is correct |
26 |
Correct |
471 ms |
6164 KB |
Output is correct |
27 |
Correct |
493 ms |
6232 KB |
Output is correct |
28 |
Correct |
4 ms |
5976 KB |
Output is correct |
29 |
Correct |
15 ms |
5980 KB |
Output is correct |
30 |
Correct |
5 ms |
6072 KB |
Output is correct |
31 |
Correct |
9 ms |
5976 KB |
Output is correct |
32 |
Correct |
7 ms |
5976 KB |
Output is correct |
33 |
Correct |
28 ms |
6236 KB |
Output is correct |
34 |
Correct |
28 ms |
6236 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
0 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
1 ms |
348 KB |
Output is correct |
5 |
Correct |
0 ms |
348 KB |
Output is correct |
6 |
Correct |
1 ms |
344 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
0 ms |
348 KB |
Output is correct |
9 |
Correct |
1 ms |
600 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
2 ms |
604 KB |
Output is correct |
12 |
Correct |
29 ms |
860 KB |
Output is correct |
13 |
Correct |
2 ms |
600 KB |
Output is correct |
14 |
Correct |
2 ms |
604 KB |
Output is correct |
15 |
Correct |
2 ms |
852 KB |
Output is correct |
16 |
Correct |
1 ms |
860 KB |
Output is correct |
17 |
Correct |
4 ms |
2652 KB |
Output is correct |
18 |
Correct |
2 ms |
5212 KB |
Output is correct |
19 |
Correct |
2 ms |
5980 KB |
Output is correct |
20 |
Correct |
296 ms |
6208 KB |
Output is correct |
21 |
Correct |
1 ms |
1372 KB |
Output is correct |
22 |
Correct |
2 ms |
5284 KB |
Output is correct |
23 |
Correct |
3 ms |
4956 KB |
Output is correct |
24 |
Correct |
4 ms |
5724 KB |
Output is correct |
25 |
Correct |
3 ms |
6008 KB |
Output is correct |
26 |
Correct |
466 ms |
6160 KB |
Output is correct |
27 |
Correct |
505 ms |
6232 KB |
Output is correct |
28 |
Correct |
4 ms |
5976 KB |
Output is correct |
29 |
Correct |
14 ms |
6116 KB |
Output is correct |
30 |
Correct |
5 ms |
6068 KB |
Output is correct |
31 |
Correct |
9 ms |
5980 KB |
Output is correct |
32 |
Correct |
7 ms |
6088 KB |
Output is correct |
33 |
Correct |
28 ms |
6236 KB |
Output is correct |
34 |
Correct |
28 ms |
6236 KB |
Output is correct |
35 |
Correct |
27 ms |
5400 KB |
Output is correct |
36 |
Correct |
6 ms |
3416 KB |
Output is correct |
37 |
Correct |
51 ms |
7004 KB |
Output is correct |
38 |
Correct |
43 ms |
7260 KB |
Output is correct |
39 |
Correct |
50 ms |
7304 KB |
Output is correct |
40 |
Correct |
43 ms |
7260 KB |
Output is correct |
41 |
Correct |
50 ms |
7256 KB |
Output is correct |
42 |
Execution timed out |
1064 ms |
7256 KB |
Time limit exceeded |
43 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
1 ms |
348 KB |
Output is correct |
3 |
Correct |
0 ms |
348 KB |
Output is correct |
4 |
Correct |
0 ms |
348 KB |
Output is correct |
5 |
Correct |
1 ms |
348 KB |
Output is correct |
6 |
Correct |
0 ms |
348 KB |
Output is correct |
7 |
Correct |
0 ms |
348 KB |
Output is correct |
8 |
Correct |
1 ms |
348 KB |
Output is correct |
9 |
Correct |
0 ms |
604 KB |
Output is correct |
10 |
Correct |
1 ms |
604 KB |
Output is correct |
11 |
Correct |
2 ms |
604 KB |
Output is correct |
12 |
Correct |
28 ms |
860 KB |
Output is correct |
13 |
Correct |
2 ms |
860 KB |
Output is correct |
14 |
Correct |
2 ms |
604 KB |
Output is correct |
15 |
Correct |
2 ms |
604 KB |
Output is correct |
16 |
Correct |
1 ms |
856 KB |
Output is correct |
17 |
Correct |
4 ms |
2528 KB |
Output is correct |
18 |
Correct |
2 ms |
5212 KB |
Output is correct |
19 |
Correct |
3 ms |
5980 KB |
Output is correct |
20 |
Correct |
298 ms |
6168 KB |
Output is correct |
21 |
Correct |
1 ms |
1372 KB |
Output is correct |
22 |
Correct |
3 ms |
5628 KB |
Output is correct |
23 |
Correct |
3 ms |
4924 KB |
Output is correct |
24 |
Correct |
5 ms |
5724 KB |
Output is correct |
25 |
Correct |
3 ms |
5980 KB |
Output is correct |
26 |
Correct |
473 ms |
5976 KB |
Output is correct |
27 |
Correct |
494 ms |
6236 KB |
Output is correct |
28 |
Correct |
4 ms |
5980 KB |
Output is correct |
29 |
Correct |
15 ms |
6124 KB |
Output is correct |
30 |
Correct |
5 ms |
5980 KB |
Output is correct |
31 |
Correct |
9 ms |
5980 KB |
Output is correct |
32 |
Correct |
7 ms |
5980 KB |
Output is correct |
33 |
Correct |
28 ms |
6236 KB |
Output is correct |
34 |
Correct |
28 ms |
6256 KB |
Output is correct |
35 |
Correct |
27 ms |
5404 KB |
Output is correct |
36 |
Correct |
5 ms |
3672 KB |
Output is correct |
37 |
Correct |
50 ms |
7004 KB |
Output is correct |
38 |
Correct |
44 ms |
7256 KB |
Output is correct |
39 |
Correct |
44 ms |
7260 KB |
Output is correct |
40 |
Correct |
51 ms |
7336 KB |
Output is correct |
41 |
Correct |
44 ms |
7260 KB |
Output is correct |
42 |
Execution timed out |
1048 ms |
7256 KB |
Time limit exceeded |
43 |
Halted |
0 ms |
0 KB |
- |