//https://oj.uz/problem/view/APIO15_skyscraper
#include <bits/stdc++.h>
using namespace std;
#define rep(i, a, b) for (int i = (a); i < (b); i++)
#define mp make_pair
#define fi first
#define se second
typedef pair<int, int> pii;
const int k = 200;
const int oo = 1e9 + 5;
const int maxn = 3e4 + 5;
int n, m, d[maxn], vs[maxn], ss, ee;
set<int> st[2][maxn];
int dij() {
priority_queue<pii> heap;
rep(i, 0, n) d[i] = oo;
d[ss] = 0;
heap.push(mp(0, ss));
while (!heap.empty()) {
pii cur = heap.top();
cur.fi *= -1;
if (cur.se == ee) return d[cur.se];
// cout << "here " << cur.se << endl;
heap.pop();
for (auto it = st[1][cur.se].begin(); it != st[1][cur.se].end(); it++) {
int jump = *it;
int pos = cur.se % jump;
for (int i = pos; i < n; i += jump) {
if (d[i] > cur.fi + abs(cur.se - i) / jump) {
d[i] = cur.fi + abs(cur.se - i) / jump;
heap.push(mp(-d[i], i));
}
}
}
for (auto it = st[0][cur.se].begin(); it != st[0][cur.se].end(); it++) {
int jump = *it;
int nxt = cur.se + jump;
if (nxt < n && d[nxt] > cur.fi + 1) {
d[nxt] = cur.fi + 1;
heap.push(mp(-d[nxt], nxt));
st[0][nxt].insert(jump);
}
else {
if (nxt < n && st[0][nxt].find(jump) == st[0][nxt].end()) {
st[0][nxt].insert(jump);
heap.push(mp(-(cur.fi + 1), nxt));
}
}
int pre = cur.se - jump;
if (pre >= 0 && d[pre] > cur.fi + 1) {
d[pre] = cur.fi + 1;
heap.push(mp(-d[pre], pre));
st[0][pre].insert(jump);
}
else {
if (pre >= 0 && st[0][pre].find(jump) == st[0][pre].end()) {
st[0][pre].insert(jump);
heap.push(mp(-(cur.fi + 1), pre));
}
}
}
}
return -1;
}
int main() {
// freopen("inp.txt", "r", stdin);
cin >> n >> m;
rep(i, 0, m) {
int x, y;
cin >> x >> y;
if (i == 0) ss = x;
if (i == 1) ee = x;
if (y <= k) st[0][x].insert(y);
else st[1][x].insert(y);
}
cout << dij();
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
3192 KB |
Output is correct |
2 |
Correct |
4 ms |
3304 KB |
Output is correct |
3 |
Correct |
4 ms |
3304 KB |
Output is correct |
4 |
Correct |
4 ms |
3304 KB |
Output is correct |
5 |
Correct |
4 ms |
3304 KB |
Output is correct |
6 |
Correct |
4 ms |
3468 KB |
Output is correct |
7 |
Correct |
4 ms |
3468 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
3468 KB |
Output is correct |
2 |
Correct |
4 ms |
3468 KB |
Output is correct |
3 |
Correct |
4 ms |
3468 KB |
Output is correct |
4 |
Correct |
4 ms |
3468 KB |
Output is correct |
5 |
Correct |
4 ms |
3468 KB |
Output is correct |
6 |
Correct |
4 ms |
3468 KB |
Output is correct |
7 |
Correct |
4 ms |
3468 KB |
Output is correct |
8 |
Correct |
4 ms |
3468 KB |
Output is correct |
9 |
Correct |
4 ms |
3540 KB |
Output is correct |
10 |
Correct |
4 ms |
3540 KB |
Output is correct |
11 |
Correct |
5 ms |
3540 KB |
Output is correct |
12 |
Correct |
5 ms |
3540 KB |
Output is correct |
13 |
Correct |
5 ms |
3540 KB |
Output is correct |
14 |
Correct |
16 ms |
3684 KB |
Output is correct |
15 |
Correct |
6 ms |
3684 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
3684 KB |
Output is correct |
2 |
Correct |
4 ms |
3684 KB |
Output is correct |
3 |
Correct |
4 ms |
3684 KB |
Output is correct |
4 |
Correct |
4 ms |
3684 KB |
Output is correct |
5 |
Correct |
4 ms |
3684 KB |
Output is correct |
6 |
Correct |
4 ms |
3684 KB |
Output is correct |
7 |
Correct |
4 ms |
3684 KB |
Output is correct |
8 |
Correct |
4 ms |
3684 KB |
Output is correct |
9 |
Correct |
4 ms |
3684 KB |
Output is correct |
10 |
Correct |
4 ms |
3684 KB |
Output is correct |
11 |
Correct |
5 ms |
3684 KB |
Output is correct |
12 |
Correct |
5 ms |
3684 KB |
Output is correct |
13 |
Correct |
5 ms |
3684 KB |
Output is correct |
14 |
Correct |
17 ms |
3800 KB |
Output is correct |
15 |
Correct |
5 ms |
3800 KB |
Output is correct |
16 |
Correct |
5 ms |
3800 KB |
Output is correct |
17 |
Correct |
6 ms |
3800 KB |
Output is correct |
18 |
Correct |
5 ms |
3800 KB |
Output is correct |
19 |
Correct |
4 ms |
3800 KB |
Output is correct |
20 |
Correct |
5 ms |
3800 KB |
Output is correct |
21 |
Correct |
4 ms |
3800 KB |
Output is correct |
22 |
Correct |
4 ms |
3800 KB |
Output is correct |
23 |
Incorrect |
6 ms |
3800 KB |
Output isn't correct |
24 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
3800 KB |
Output is correct |
2 |
Correct |
4 ms |
3800 KB |
Output is correct |
3 |
Correct |
4 ms |
3800 KB |
Output is correct |
4 |
Correct |
4 ms |
3800 KB |
Output is correct |
5 |
Correct |
4 ms |
3800 KB |
Output is correct |
6 |
Correct |
4 ms |
3800 KB |
Output is correct |
7 |
Correct |
4 ms |
3800 KB |
Output is correct |
8 |
Correct |
4 ms |
3800 KB |
Output is correct |
9 |
Correct |
4 ms |
3800 KB |
Output is correct |
10 |
Correct |
4 ms |
3800 KB |
Output is correct |
11 |
Correct |
5 ms |
3800 KB |
Output is correct |
12 |
Correct |
5 ms |
3800 KB |
Output is correct |
13 |
Correct |
4 ms |
3800 KB |
Output is correct |
14 |
Correct |
16 ms |
3800 KB |
Output is correct |
15 |
Correct |
6 ms |
3800 KB |
Output is correct |
16 |
Correct |
4 ms |
3800 KB |
Output is correct |
17 |
Correct |
6 ms |
3800 KB |
Output is correct |
18 |
Correct |
4 ms |
3800 KB |
Output is correct |
19 |
Correct |
4 ms |
3800 KB |
Output is correct |
20 |
Correct |
5 ms |
3800 KB |
Output is correct |
21 |
Correct |
4 ms |
3800 KB |
Output is correct |
22 |
Correct |
4 ms |
3800 KB |
Output is correct |
23 |
Incorrect |
6 ms |
3800 KB |
Output isn't correct |
24 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
3800 KB |
Output is correct |
2 |
Correct |
4 ms |
3800 KB |
Output is correct |
3 |
Correct |
4 ms |
3800 KB |
Output is correct |
4 |
Correct |
4 ms |
3800 KB |
Output is correct |
5 |
Correct |
4 ms |
3800 KB |
Output is correct |
6 |
Correct |
4 ms |
3800 KB |
Output is correct |
7 |
Correct |
4 ms |
3800 KB |
Output is correct |
8 |
Correct |
4 ms |
3800 KB |
Output is correct |
9 |
Correct |
5 ms |
3800 KB |
Output is correct |
10 |
Correct |
4 ms |
3800 KB |
Output is correct |
11 |
Correct |
5 ms |
3800 KB |
Output is correct |
12 |
Correct |
4 ms |
3800 KB |
Output is correct |
13 |
Correct |
5 ms |
3800 KB |
Output is correct |
14 |
Correct |
16 ms |
3800 KB |
Output is correct |
15 |
Correct |
6 ms |
3800 KB |
Output is correct |
16 |
Correct |
5 ms |
3800 KB |
Output is correct |
17 |
Correct |
6 ms |
3800 KB |
Output is correct |
18 |
Correct |
5 ms |
3800 KB |
Output is correct |
19 |
Correct |
4 ms |
3800 KB |
Output is correct |
20 |
Correct |
5 ms |
3800 KB |
Output is correct |
21 |
Correct |
4 ms |
3800 KB |
Output is correct |
22 |
Correct |
5 ms |
3800 KB |
Output is correct |
23 |
Incorrect |
6 ms |
3800 KB |
Output isn't correct |
24 |
Halted |
0 ms |
0 KB |
- |