#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define ff first
#define ss second
#define pii pair<int, int>
int main() {
ios::sync_with_stdio(false); cin.tie(nullptr);
int n, m;
cin >> n >> m;
int tx;
vector<int> dis(n, INT_MAX);
vector<set<int>> p(n);
priority_queue<pii> q;
for (int i = 0; i < m; i++) {
int x, y;
cin >> x >> y;
p[x].insert(y);
if (!i) {
dis[x] = 0;
q.push({0, x});
}
else if (i == 1) tx = x;
}
while (!q.empty()) {
auto [d, x] = q.top(); d = -d; q.pop();
if (d != dis[x]) continue;
for (auto j : p[x]) {
for (int i = x + j; i < n; i += j) {
if (!p[i].empty() && d + abs(i - x) / j < dis[i]) {
dis[i] = d + abs(i - x) / j;
q.push({-dis[i], i});
}
if (p[i].find(j) != p[i].end()) break;
}
for (int i = x - j; i >= 0; i -= j) {
if (!p[i].empty() && d + abs(i - x) / j < dis[i]) {
dis[i] = d + abs(i - x) / j;
q.push({-dis[i], i});
}
if (p[i].find(j) != p[i].end()) break;
}
}
}
cout << (dis[tx] == INT_MAX ? -1 : dis[tx]);
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:58:20: warning: 'tx' may be used uninitialized in this function [-Wmaybe-uninitialized]
58 | cout << (dis[tx] == INT_MAX ? -1 : dis[tx]);
| ^
| # |
Verdict |
Execution time |
Memory |
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 |
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 |
| # |
Verdict |
Execution time |
Memory |
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 |
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 |
344 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
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 |
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 |
0 ms |
600 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
1 ms |
348 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
1 ms |
604 KB |
Output is correct |
| 21 |
Correct |
0 ms |
348 KB |
Output is correct |
| 22 |
Correct |
0 ms |
348 KB |
Output is correct |
| 23 |
Correct |
0 ms |
348 KB |
Output is correct |
| 24 |
Correct |
1 ms |
604 KB |
Output is correct |
| 25 |
Correct |
1 ms |
600 KB |
Output is correct |
| 26 |
Correct |
1 ms |
344 KB |
Output is correct |
| 27 |
Correct |
0 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
0 ms |
348 KB |
Output is correct |
| 30 |
Correct |
0 ms |
348 KB |
Output is correct |
| 31 |
Correct |
1 ms |
348 KB |
Output is correct |
| 32 |
Correct |
0 ms |
348 KB |
Output is correct |
| 33 |
Correct |
1 ms |
604 KB |
Output is correct |
| 34 |
Correct |
1 ms |
856 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
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 |
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 |
1 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
344 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
0 ms |
348 KB |
Output is correct |
| 13 |
Correct |
0 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
1 ms |
604 KB |
Output is correct |
| 18 |
Correct |
0 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
1 ms |
604 KB |
Output is correct |
| 21 |
Correct |
0 ms |
348 KB |
Output is correct |
| 22 |
Correct |
0 ms |
348 KB |
Output is correct |
| 23 |
Correct |
1 ms |
348 KB |
Output is correct |
| 24 |
Correct |
1 ms |
604 KB |
Output is correct |
| 25 |
Correct |
2 ms |
604 KB |
Output is correct |
| 26 |
Correct |
1 ms |
348 KB |
Output is correct |
| 27 |
Correct |
0 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
1 ms |
348 KB |
Output is correct |
| 30 |
Correct |
0 ms |
348 KB |
Output is correct |
| 31 |
Correct |
0 ms |
348 KB |
Output is correct |
| 32 |
Correct |
0 ms |
348 KB |
Output is correct |
| 33 |
Correct |
1 ms |
600 KB |
Output is correct |
| 34 |
Correct |
1 ms |
600 KB |
Output is correct |
| 35 |
Correct |
10 ms |
1776 KB |
Output is correct |
| 36 |
Correct |
2 ms |
600 KB |
Output is correct |
| 37 |
Correct |
10 ms |
1564 KB |
Output is correct |
| 38 |
Correct |
13 ms |
1972 KB |
Output is correct |
| 39 |
Correct |
13 ms |
1884 KB |
Output is correct |
| 40 |
Correct |
13 ms |
1884 KB |
Output is correct |
| 41 |
Correct |
14 ms |
1884 KB |
Output is correct |
| 42 |
Correct |
4 ms |
564 KB |
Output is correct |
| 43 |
Correct |
3 ms |
348 KB |
Output is correct |
| 44 |
Correct |
3 ms |
604 KB |
Output is correct |
| 45 |
Correct |
10 ms |
1836 KB |
Output is correct |
| 46 |
Correct |
10 ms |
1860 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
1 ms |
348 KB |
Output is correct |
| 3 |
Correct |
1 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 |
364 KB |
Output is correct |
| 7 |
Correct |
0 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
344 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
344 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
1 ms |
604 KB |
Output is correct |
| 18 |
Correct |
1 ms |
348 KB |
Output is correct |
| 19 |
Correct |
1 ms |
344 KB |
Output is correct |
| 20 |
Correct |
1 ms |
604 KB |
Output is correct |
| 21 |
Correct |
1 ms |
348 KB |
Output is correct |
| 22 |
Correct |
1 ms |
348 KB |
Output is correct |
| 23 |
Correct |
1 ms |
344 KB |
Output is correct |
| 24 |
Correct |
1 ms |
604 KB |
Output is correct |
| 25 |
Correct |
1 ms |
604 KB |
Output is correct |
| 26 |
Correct |
0 ms |
348 KB |
Output is correct |
| 27 |
Correct |
1 ms |
348 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
1 ms |
348 KB |
Output is correct |
| 30 |
Correct |
0 ms |
348 KB |
Output is correct |
| 31 |
Correct |
0 ms |
348 KB |
Output is correct |
| 32 |
Correct |
0 ms |
348 KB |
Output is correct |
| 33 |
Correct |
1 ms |
604 KB |
Output is correct |
| 34 |
Correct |
2 ms |
604 KB |
Output is correct |
| 35 |
Correct |
10 ms |
1628 KB |
Output is correct |
| 36 |
Correct |
1 ms |
604 KB |
Output is correct |
| 37 |
Correct |
10 ms |
1368 KB |
Output is correct |
| 38 |
Correct |
15 ms |
1884 KB |
Output is correct |
| 39 |
Correct |
16 ms |
2236 KB |
Output is correct |
| 40 |
Correct |
12 ms |
2140 KB |
Output is correct |
| 41 |
Correct |
11 ms |
1880 KB |
Output is correct |
| 42 |
Correct |
2 ms |
348 KB |
Output is correct |
| 43 |
Correct |
2 ms |
348 KB |
Output is correct |
| 44 |
Correct |
3 ms |
604 KB |
Output is correct |
| 45 |
Correct |
10 ms |
1884 KB |
Output is correct |
| 46 |
Correct |
10 ms |
1880 KB |
Output is correct |
| 47 |
Correct |
22 ms |
2540 KB |
Output is correct |
| 48 |
Correct |
5 ms |
2652 KB |
Output is correct |
| 49 |
Correct |
5 ms |
2652 KB |
Output is correct |
| 50 |
Correct |
4 ms |
2396 KB |
Output is correct |
| 51 |
Correct |
18 ms |
3812 KB |
Output is correct |
| 52 |
Correct |
18 ms |
3800 KB |
Output is correct |
| 53 |
Correct |
14 ms |
3676 KB |
Output is correct |
| 54 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 55 |
Correct |
1 ms |
1884 KB |
Output is correct |
| 56 |
Correct |
6 ms |
3164 KB |
Output is correct |
| 57 |
Correct |
4 ms |
2140 KB |
Output is correct |
| 58 |
Correct |
3 ms |
1884 KB |
Output is correct |
| 59 |
Correct |
3 ms |
1880 KB |
Output is correct |
| 60 |
Correct |
4 ms |
1884 KB |
Output is correct |
| 61 |
Correct |
4 ms |
2140 KB |
Output is correct |
| 62 |
Correct |
10 ms |
3164 KB |
Output is correct |
| 63 |
Correct |
14 ms |
3420 KB |
Output is correct |
| 64 |
Correct |
16 ms |
3420 KB |
Output is correct |
| 65 |
Correct |
23 ms |
3672 KB |
Output is correct |
| 66 |
Correct |
27 ms |
3416 KB |
Output is correct |
| 67 |
Correct |
24 ms |
3416 KB |
Output is correct |
