#include <bits/stdc++.h>
#pragma GCC optimize("O3", "unroll-loops")
using namespace std;
// #define int long long
typedef pair<int, int> T;
const int oo = 1e9 + 7, K = 30;
const int mod = 998244353;
void solve() {
int n, m;
cin >> n >> m;
vector<vector<T>> g(n + 2);
vector<vector<int>> doge(n + 1);
int start, kon;
for (int i = 0; i < m; i++) {
int v, j;
cin >> v >> j;
if (i == 0) start = v;
if (i == 1) kon = v;
doge[v].emplace_back(j);
}
vector<int> dist(n + 2, oo);
set<T> s;
s.insert({0, start});
dist[start] = 0;
while ((int) s.size()) {
auto [d, v] = *s.begin();
s.erase(s.begin());
if (dist[v] < d) continue;
auto popraw = [&](int what, int from, int c) {
if (dist[what] > dist[from] + c) {
dist[what] = dist[from] + c;
s.insert({dist[what], what});
}
};
for (auto j : doge[v]) {
for (int u = v - j, k = 1; u >= 0; u -= j, k++) {
popraw(u, v, k);
}
for (int u = v + j, k = 1; u < n; u += j, k++) {
popraw(u, v, k);
}
}
}
int ans = dist[kon];
if (ans == oo) ans = -1;
cout << ans << "\n";
}
int32_t main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int t = 1;
//cin >> t;
while (t--) solve();
return 0;
}
Compilation message
skyscraper.cpp: In function 'void solve()':
skyscraper.cpp:26:15: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized]
26 | dist[start] = 0;
| ^
skyscraper.cpp:46:23: warning: 'kon' may be used uninitialized in this function [-Wmaybe-uninitialized]
46 | int ans = dist[kon];
| ^
| # |
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 |
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 |
| # |
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 |
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 |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
360 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 |
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 |
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 |
756 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 |
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 |
344 KB |
Output is correct |
| 16 |
Correct |
0 ms |
420 KB |
Output is correct |
| 17 |
Correct |
1 ms |
344 KB |
Output is correct |
| 18 |
Correct |
0 ms |
344 KB |
Output is correct |
| 19 |
Correct |
0 ms |
344 KB |
Output is correct |
| 20 |
Correct |
3 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 |
604 KB |
Output is correct |
| 24 |
Correct |
1 ms |
600 KB |
Output is correct |
| 25 |
Correct |
1 ms |
604 KB |
Output is correct |
| 26 |
Correct |
3 ms |
604 KB |
Output is correct |
| 27 |
Correct |
3 ms |
604 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
2 ms |
856 KB |
Output is correct |
| 30 |
Correct |
1 ms |
604 KB |
Output is correct |
| 31 |
Correct |
1 ms |
860 KB |
Output is correct |
| 32 |
Correct |
1 ms |
604 KB |
Output is correct |
| 33 |
Correct |
2 ms |
1116 KB |
Output is correct |
| 34 |
Correct |
2 ms |
1116 KB |
Output is correct |
| # |
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 |
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 |
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 |
1 ms |
504 KB |
Output is correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
0 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
600 KB |
Output is correct |
| 16 |
Correct |
0 ms |
348 KB |
Output is correct |
| 17 |
Correct |
1 ms |
348 KB |
Output is correct |
| 18 |
Correct |
1 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
3 ms |
604 KB |
Output is correct |
| 21 |
Correct |
1 ms |
348 KB |
Output is correct |
| 22 |
Correct |
0 ms |
348 KB |
Output is correct |
| 23 |
Correct |
2 ms |
344 KB |
Output is correct |
| 24 |
Correct |
1 ms |
600 KB |
Output is correct |
| 25 |
Correct |
1 ms |
648 KB |
Output is correct |
| 26 |
Correct |
3 ms |
604 KB |
Output is correct |
| 27 |
Correct |
3 ms |
604 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
3 ms |
860 KB |
Output is correct |
| 30 |
Correct |
1 ms |
604 KB |
Output is correct |
| 31 |
Correct |
1 ms |
860 KB |
Output is correct |
| 32 |
Correct |
1 ms |
604 KB |
Output is correct |
| 33 |
Correct |
3 ms |
1116 KB |
Output is correct |
| 34 |
Correct |
3 ms |
1116 KB |
Output is correct |
| 35 |
Correct |
5 ms |
688 KB |
Output is correct |
| 36 |
Correct |
1 ms |
604 KB |
Output is correct |
| 37 |
Correct |
4 ms |
860 KB |
Output is correct |
| 38 |
Correct |
6 ms |
860 KB |
Output is correct |
| 39 |
Correct |
6 ms |
860 KB |
Output is correct |
| 40 |
Correct |
6 ms |
856 KB |
Output is correct |
| 41 |
Correct |
6 ms |
860 KB |
Output is correct |
| 42 |
Correct |
36 ms |
668 KB |
Output is correct |
| 43 |
Correct |
36 ms |
604 KB |
Output is correct |
| 44 |
Correct |
36 ms |
600 KB |
Output is correct |
| 45 |
Correct |
5 ms |
1116 KB |
Output is correct |
| 46 |
Correct |
5 ms |
1116 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 |
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 |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 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 |
344 KB |
Output is correct |
| 18 |
Correct |
1 ms |
348 KB |
Output is correct |
| 19 |
Correct |
0 ms |
348 KB |
Output is correct |
| 20 |
Correct |
5 ms |
712 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 |
348 KB |
Output is correct |
| 24 |
Correct |
1 ms |
604 KB |
Output is correct |
| 25 |
Correct |
1 ms |
604 KB |
Output is correct |
| 26 |
Correct |
3 ms |
604 KB |
Output is correct |
| 27 |
Correct |
3 ms |
604 KB |
Output is correct |
| 28 |
Correct |
1 ms |
604 KB |
Output is correct |
| 29 |
Correct |
2 ms |
860 KB |
Output is correct |
| 30 |
Correct |
1 ms |
600 KB |
Output is correct |
| 31 |
Correct |
1 ms |
860 KB |
Output is correct |
| 32 |
Correct |
1 ms |
604 KB |
Output is correct |
| 33 |
Correct |
3 ms |
1068 KB |
Output is correct |
| 34 |
Correct |
3 ms |
1112 KB |
Output is correct |
| 35 |
Correct |
4 ms |
856 KB |
Output is correct |
| 36 |
Correct |
2 ms |
600 KB |
Output is correct |
| 37 |
Correct |
4 ms |
860 KB |
Output is correct |
| 38 |
Correct |
6 ms |
860 KB |
Output is correct |
| 39 |
Correct |
6 ms |
860 KB |
Output is correct |
| 40 |
Correct |
6 ms |
860 KB |
Output is correct |
| 41 |
Correct |
6 ms |
860 KB |
Output is correct |
| 42 |
Correct |
36 ms |
604 KB |
Output is correct |
| 43 |
Correct |
36 ms |
604 KB |
Output is correct |
| 44 |
Correct |
39 ms |
600 KB |
Output is correct |
| 45 |
Correct |
5 ms |
1112 KB |
Output is correct |
| 46 |
Correct |
5 ms |
1120 KB |
Output is correct |
| 47 |
Correct |
15 ms |
3420 KB |
Output is correct |
| 48 |
Correct |
4 ms |
1880 KB |
Output is correct |
| 49 |
Correct |
4 ms |
2140 KB |
Output is correct |
| 50 |
Correct |
3 ms |
2140 KB |
Output is correct |
| 51 |
Correct |
25 ms |
5724 KB |
Output is correct |
| 52 |
Correct |
25 ms |
5424 KB |
Output is correct |
| 53 |
Correct |
11 ms |
4188 KB |
Output is correct |
| 54 |
Correct |
3 ms |
2652 KB |
Output is correct |
| 55 |
Correct |
3 ms |
2652 KB |
Output is correct |
| 56 |
Correct |
536 ms |
4316 KB |
Output is correct |
| 57 |
Correct |
47 ms |
9296 KB |
Output is correct |
| 58 |
Correct |
607 ms |
2648 KB |
Output is correct |
| 59 |
Correct |
484 ms |
2648 KB |
Output is correct |
| 60 |
Correct |
542 ms |
2804 KB |
Output is correct |
| 61 |
Correct |
453 ms |
2808 KB |
Output is correct |
| 62 |
Correct |
7 ms |
2908 KB |
Output is correct |
| 63 |
Correct |
36 ms |
8272 KB |
Output is correct |
| 64 |
Correct |
36 ms |
8300 KB |
Output is correct |
| 65 |
Correct |
42 ms |
9564 KB |
Output is correct |
| 66 |
Correct |
56 ms |
13008 KB |
Output is correct |
| 67 |
Correct |
56 ms |
12884 KB |
Output is correct |
