#include <bits/stdc++.h>
using namespace std;
#define N 30000
#define INF 0x3f3f3f3f
vector<int> ed[N];
vector<pair<int, int>> ej[N];
bool find(int j, int d) {
auto it = lower_bound(ed[j].begin(), ed[j].end(), d);
return it != ed[j].end() && *it == d;
}
int main() {
static int dd[N];
int n, m, i, j, d, s, t;
priority_queue<pair<int, int>, vector<pair<int, int>>, greater<pair<int,int>>> pq;
scanf("%d%d", &n, &m);
s = t = -1;
for (i = 0; i < m; i++) {
scanf("%d%d", &j, &d);
if (i == 0)
s = j;
else if (i == 1)
t = j;
ed[j].push_back(d);
}
for (i = 0; i < n; i++) {
sort(ed[i].begin(), ed[i].end());
ed[i].erase(unique(ed[i].begin(), ed[i].end()), ed[i].end());
}
for (i = 0; i < n; i++)
for (int d : ed[i]) {
for (j = i + d; j < n; j += d) {
ej[i].push_back({j, (j - i) / d});
if (find(j, d))
break;
}
for (j = i - d; j >= 0; j -= d) {
ej[i].push_back({j, (i - j) / d});
if (find(j, d))
break;
}
}
memset(dd, 0x3f, n * sizeof *dd);
dd[s] = 0;
pq.push({0, s});
while (!pq.empty()) {
i = pq.top().second;
pq.pop();
for (auto [j, w] : ej[i]) {
d = dd[i] + w;
if (d < dd[j]) {
dd[j] = d;
pq.push({d, j});
}
}
}
printf("%d\n", dd[t] == INF ? -1 : dd[t]);
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:21:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
21 | scanf("%d%d", &n, &m);
| ~~~~~^~~~~~~~~~~~~~~~
skyscraper.cpp:24:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
24 | scanf("%d%d", &j, &d);
| ~~~~~^~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1704 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1612 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1612 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1696 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 5 |
Correct |
2 ms |
1612 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1712 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1612 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 14 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1712 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1716 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1612 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1712 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1840 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1868 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1972 KB |
Output is correct |
| 29 |
Correct |
4 ms |
2508 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 31 |
Correct |
3 ms |
2124 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 33 |
Correct |
6 ms |
3148 KB |
Output is correct |
| 34 |
Correct |
6 ms |
3148 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1708 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1700 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 7 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 9 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 12 |
Correct |
2 ms |
1612 KB |
Output is correct |
| 13 |
Correct |
2 ms |
1612 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 15 |
Correct |
3 ms |
1740 KB |
Output is correct |
| 16 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1712 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1708 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1848 KB |
Output is correct |
| 25 |
Correct |
3 ms |
1868 KB |
Output is correct |
| 26 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 29 |
Correct |
5 ms |
2392 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 31 |
Correct |
3 ms |
2124 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 33 |
Correct |
6 ms |
3148 KB |
Output is correct |
| 34 |
Correct |
6 ms |
3148 KB |
Output is correct |
| 35 |
Correct |
10 ms |
3132 KB |
Output is correct |
| 36 |
Correct |
3 ms |
1984 KB |
Output is correct |
| 37 |
Correct |
12 ms |
3964 KB |
Output is correct |
| 38 |
Correct |
20 ms |
3884 KB |
Output is correct |
| 39 |
Correct |
15 ms |
3900 KB |
Output is correct |
| 40 |
Correct |
15 ms |
3892 KB |
Output is correct |
| 41 |
Correct |
14 ms |
3916 KB |
Output is correct |
| 42 |
Correct |
6 ms |
2124 KB |
Output is correct |
| 43 |
Correct |
8 ms |
2088 KB |
Output is correct |
| 44 |
Correct |
6 ms |
2124 KB |
Output is correct |
| 45 |
Correct |
19 ms |
6604 KB |
Output is correct |
| 46 |
Correct |
18 ms |
6692 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1700 KB |
Output is correct |
| 2 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 3 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 4 |
Correct |
1 ms |
1704 KB |
Output is correct |
| 5 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 6 |
Correct |
1 ms |
1700 KB |
Output is correct |
| 7 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 8 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 9 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 10 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 11 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 12 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 13 |
Correct |
1 ms |
1612 KB |
Output is correct |
| 14 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 15 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 16 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 17 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 18 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 19 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 20 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 21 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 22 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 23 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 24 |
Correct |
3 ms |
1844 KB |
Output is correct |
| 25 |
Correct |
2 ms |
1868 KB |
Output is correct |
| 26 |
Correct |
1 ms |
1740 KB |
Output is correct |
| 27 |
Correct |
2 ms |
1740 KB |
Output is correct |
| 28 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 29 |
Correct |
4 ms |
2508 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 31 |
Correct |
2 ms |
2124 KB |
Output is correct |
| 32 |
Correct |
2 ms |
1996 KB |
Output is correct |
| 33 |
Correct |
6 ms |
3148 KB |
Output is correct |
| 34 |
Correct |
6 ms |
3260 KB |
Output is correct |
| 35 |
Correct |
10 ms |
3104 KB |
Output is correct |
| 36 |
Correct |
3 ms |
1868 KB |
Output is correct |
| 37 |
Correct |
12 ms |
4044 KB |
Output is correct |
| 38 |
Correct |
14 ms |
3932 KB |
Output is correct |
| 39 |
Correct |
14 ms |
3924 KB |
Output is correct |
| 40 |
Correct |
13 ms |
3916 KB |
Output is correct |
| 41 |
Correct |
15 ms |
3916 KB |
Output is correct |
| 42 |
Correct |
6 ms |
2096 KB |
Output is correct |
| 43 |
Correct |
7 ms |
2124 KB |
Output is correct |
| 44 |
Correct |
6 ms |
2100 KB |
Output is correct |
| 45 |
Correct |
17 ms |
6604 KB |
Output is correct |
| 46 |
Correct |
17 ms |
6604 KB |
Output is correct |
| 47 |
Correct |
40 ms |
11344 KB |
Output is correct |
| 48 |
Correct |
17 ms |
4768 KB |
Output is correct |
| 49 |
Correct |
13 ms |
3892 KB |
Output is correct |
| 50 |
Correct |
10 ms |
3728 KB |
Output is correct |
| 51 |
Correct |
34 ms |
6732 KB |
Output is correct |
| 52 |
Correct |
35 ms |
7112 KB |
Output is correct |
| 53 |
Correct |
16 ms |
4332 KB |
Output is correct |
| 54 |
Correct |
3 ms |
2252 KB |
Output is correct |
| 55 |
Correct |
4 ms |
2724 KB |
Output is correct |
| 56 |
Correct |
12 ms |
3884 KB |
Output is correct |
| 57 |
Correct |
35 ms |
10824 KB |
Output is correct |
| 58 |
Correct |
9 ms |
2988 KB |
Output is correct |
| 59 |
Correct |
10 ms |
3580 KB |
Output is correct |
| 60 |
Correct |
11 ms |
4168 KB |
Output is correct |
| 61 |
Correct |
11 ms |
3396 KB |
Output is correct |
| 62 |
Correct |
22 ms |
8244 KB |
Output is correct |
| 63 |
Correct |
63 ms |
24720 KB |
Output is correct |
| 64 |
Correct |
70 ms |
27516 KB |
Output is correct |
| 65 |
Correct |
94 ms |
37624 KB |
Output is correct |
| 66 |
Correct |
208 ms |
65664 KB |
Output is correct |
| 67 |
Correct |
208 ms |
65936 KB |
Output is correct |
