// trying c8kism be like
#include <bits/stdc++.h>
#define ef else if
#define pb push_back
#define leave exit(0);
using namespace std;
typedef int _;
typedef pair<_, _> _p;
typedef vector<_> v_;
typedef const long long constant;
constant maxn = 3E4 + 5;
_ n, m, c, b[maxn], p[maxn], dist[maxn];
set<_> dg[maxn];
void dijk(_ s);
int main() {
scanf("%d %d", &n, &m);
for (_ i = 0; i < m; ++i) scanf("%d %d", &b[i], &p[i]), dg[b[i]].insert(p[i]);
if (b[0] == b[1]) puts("0"), leave
dijk(b[0]);
if (dist[b[1]] == 1E9) cout << "-1\n";
else cout << dist[b[1]] << "\n";
return 0;
}
void dijk(_ s) {
priority_queue<_p, vector<_p>, greater<_p> > q;
fill(dist, dist + maxn, 1E9);
dist[s] = 0;
q.push({0, s});
while (!q.empty()) {
_ d = q.top().first, u = q.top().second;
q.pop();
if (d != dist[u]) continue;
for (_ jump : dg[u]) {
c = 1;
for (_ i = u + jump; i < n; i += jump, c++) {
if (dist[i] > dist[u] + c) dist[i] = dist[u] + c, q.push({dist[i], i});
}
c = 1;
for (_ i = u - jump; i >= 0; i -= jump, c++) {
if (dist[i] > dist[u] + c) dist[i] = dist[u] + c, q.push({dist[i], i});
}
}
}
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
20 | scanf("%d %d", &n, &m);
| ~~~~~^~~~~~~~~~~~~~~~~
skyscraper.cpp:21:36: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
21 | for (_ i = 0; i < m; ++i) scanf("%d %d", &b[i], &p[i]), dg[b[i]].insert(p[i]);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1620 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1620 KB |
Output is correct |
| 4 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 7 |
Correct |
2 ms |
1748 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1620 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1620 KB |
Output is correct |
| 4 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1840 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1836 KB |
Output is correct |
| 8 |
Correct |
2 ms |
1840 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1836 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 11 |
Correct |
3 ms |
1852 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1964 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1876 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1620 KB |
Output is correct |
| 3 |
Correct |
2 ms |
1620 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1840 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1792 KB |
Output is correct |
| 6 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1836 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1836 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1816 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1840 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1852 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1940 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1852 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 18 |
Correct |
1 ms |
1876 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1844 KB |
Output is correct |
| 20 |
Correct |
7 ms |
1876 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 25 |
Correct |
3 ms |
2004 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1852 KB |
Output is correct |
| 29 |
Correct |
4 ms |
2004 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 31 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1964 KB |
Output is correct |
| 33 |
Correct |
5 ms |
2260 KB |
Output is correct |
| 34 |
Correct |
6 ms |
2232 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1620 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1712 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1840 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1784 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1840 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1848 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1848 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 14 |
Correct |
3 ms |
1876 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1844 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1840 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1976 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 19 |
Correct |
1 ms |
1876 KB |
Output is correct |
| 20 |
Correct |
5 ms |
1876 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1840 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 24 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 25 |
Correct |
3 ms |
1980 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1852 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 29 |
Correct |
3 ms |
2096 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1836 KB |
Output is correct |
| 31 |
Correct |
3 ms |
1876 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 33 |
Correct |
5 ms |
2260 KB |
Output is correct |
| 34 |
Correct |
5 ms |
2236 KB |
Output is correct |
| 35 |
Correct |
13 ms |
3404 KB |
Output is correct |
| 36 |
Correct |
3 ms |
2112 KB |
Output is correct |
| 37 |
Correct |
10 ms |
3156 KB |
Output is correct |
| 38 |
Correct |
14 ms |
3812 KB |
Output is correct |
| 39 |
Correct |
13 ms |
3720 KB |
Output is correct |
| 40 |
Correct |
13 ms |
3840 KB |
Output is correct |
| 41 |
Correct |
13 ms |
3776 KB |
Output is correct |
| 42 |
Correct |
6 ms |
2164 KB |
Output is correct |
| 43 |
Correct |
8 ms |
2260 KB |
Output is correct |
| 44 |
Correct |
10 ms |
2388 KB |
Output is correct |
| 45 |
Correct |
17 ms |
4024 KB |
Output is correct |
| 46 |
Correct |
18 ms |
4052 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 2 |
Correct |
2 ms |
1748 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1708 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1844 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1748 KB |
Output is correct |
| 10 |
Correct |
2 ms |
1792 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1876 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1848 KB |
Output is correct |
| 20 |
Correct |
6 ms |
1968 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 22 |
Correct |
1 ms |
1876 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1848 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1944 KB |
Output is correct |
| 25 |
Correct |
3 ms |
2004 KB |
Output is correct |
| 26 |
Correct |
3 ms |
1876 KB |
Output is correct |
| 27 |
Correct |
3 ms |
1848 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 29 |
Correct |
3 ms |
2028 KB |
Output is correct |
| 30 |
Correct |
3 ms |
1876 KB |
Output is correct |
| 31 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1876 KB |
Output is correct |
| 33 |
Correct |
4 ms |
2260 KB |
Output is correct |
| 34 |
Correct |
5 ms |
2260 KB |
Output is correct |
| 35 |
Correct |
13 ms |
3416 KB |
Output is correct |
| 36 |
Correct |
3 ms |
2108 KB |
Output is correct |
| 37 |
Correct |
9 ms |
3156 KB |
Output is correct |
| 38 |
Correct |
15 ms |
3768 KB |
Output is correct |
| 39 |
Correct |
15 ms |
3828 KB |
Output is correct |
| 40 |
Correct |
15 ms |
3788 KB |
Output is correct |
| 41 |
Correct |
14 ms |
3796 KB |
Output is correct |
| 42 |
Correct |
7 ms |
2260 KB |
Output is correct |
| 43 |
Correct |
7 ms |
2260 KB |
Output is correct |
| 44 |
Correct |
10 ms |
2392 KB |
Output is correct |
| 45 |
Correct |
15 ms |
4052 KB |
Output is correct |
| 46 |
Correct |
16 ms |
4052 KB |
Output is correct |
| 47 |
Correct |
19 ms |
4060 KB |
Output is correct |
| 48 |
Correct |
10 ms |
3272 KB |
Output is correct |
| 49 |
Correct |
9 ms |
3172 KB |
Output is correct |
| 50 |
Correct |
6 ms |
2744 KB |
Output is correct |
| 51 |
Correct |
32 ms |
4944 KB |
Output is correct |
| 52 |
Correct |
25 ms |
4436 KB |
Output is correct |
| 53 |
Correct |
18 ms |
4476 KB |
Output is correct |
| 54 |
Correct |
3 ms |
2004 KB |
Output is correct |
| 55 |
Correct |
3 ms |
2004 KB |
Output is correct |
| 56 |
Correct |
770 ms |
4052 KB |
Output is correct |
| 57 |
Correct |
41 ms |
4084 KB |
Output is correct |
| 58 |
Correct |
10 ms |
2388 KB |
Output is correct |
| 59 |
Correct |
9 ms |
2460 KB |
Output is correct |
| 60 |
Correct |
14 ms |
2524 KB |
Output is correct |
| 61 |
Correct |
10 ms |
2652 KB |
Output is correct |
| 62 |
Correct |
13 ms |
3692 KB |
Output is correct |
| 63 |
Correct |
40 ms |
5836 KB |
Output is correct |
| 64 |
Correct |
45 ms |
5836 KB |
Output is correct |
| 65 |
Correct |
46 ms |
5792 KB |
Output is correct |
| 66 |
Correct |
99 ms |
7852 KB |
Output is correct |
| 67 |
Correct |
113 ms |
7928 KB |
Output is correct |
