#include <stdio.h>
#include <vector>
#include <queue>
#define N 30001
#define minus(x,y) (y?-(x):x)
#define Abs(x) (x>0?x:-(x))
#define LIMIT 1000
using namespace std;
typedef pair<int, pair<int, int> > pip;
int n, m, sw, ew, d[N];
bool check[N];
bool check2[N][LIMIT + 1];
vector<int> V[N];
queue<pip> Q;
int main() {
int x, y;
int w, p, c;
scanf("%d %d", &m, &n);
for (int i = 1; i <= n; i++) {
scanf("%d %d", &x, &y);
V[++x].push_back(y);
if (i == 1) sw = x;
if (i == 2) ew = x;
}
Q.push({ 0,{ sw,m + 1 } });
while (!Q.empty()) {
c = Q.front().first;
w = Q.front().second.first;
p = Q.front().second.second;
Q.pop();
if (check[ew]) break;
if (Abs(p) <= LIMIT) {
if(check2[w][Abs(p)]) continue;
check2[w][Abs(p)] = true;
}
if (1 <= w + p && w + p <= m) Q.push({ c + 1,{ w + p,p } });
if (!check[w]) {
check[w] = true, d[w] = c;
for (auto i : V[w]) {
if (1 <= w + i && w + i <= m) Q.push({ c + 1,{ w + i,i } });
if (1 <= w - i && w - i <= m) Q.push({ c + 1,{ w - i,-i } });
}
}
} printf("%d", check[ew] ? d[ew] : -1);
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:21:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &m, &n);
^
skyscraper.cpp:23:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d", &x, &y);
^
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 2 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 3 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 4 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 5 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 6 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 7 |
Correct |
0 ms |
32112 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 2 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 3 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 4 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 5 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 6 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 7 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 8 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 9 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 10 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 11 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 12 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 13 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 14 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 15 |
Correct |
0 ms |
32112 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 2 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 3 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 4 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 5 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 6 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 7 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 8 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 9 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 10 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 11 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 12 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 13 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 14 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 15 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 16 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 17 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 18 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 19 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 20 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 21 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 22 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 23 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 24 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 25 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 26 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 27 |
Correct |
3 ms |
32244 KB |
Output is correct |
| 28 |
Correct |
3 ms |
32244 KB |
Output is correct |
| 29 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 30 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 31 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 32 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 33 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 34 |
Correct |
0 ms |
32112 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 2 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 3 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 4 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 5 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 6 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 7 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 8 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 9 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 10 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 11 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 12 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 13 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 14 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 15 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 16 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 17 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 18 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 19 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 20 |
Correct |
3 ms |
32244 KB |
Output is correct |
| 21 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 22 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 23 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 24 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 25 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 26 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 27 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 28 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 29 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 30 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 31 |
Correct |
3 ms |
32112 KB |
Output is correct |
| 32 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 33 |
Correct |
3 ms |
32112 KB |
Output is correct |
| 34 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 35 |
Correct |
6 ms |
32508 KB |
Output is correct |
| 36 |
Correct |
3 ms |
32244 KB |
Output is correct |
| 37 |
Correct |
6 ms |
32508 KB |
Output is correct |
| 38 |
Correct |
9 ms |
32648 KB |
Output is correct |
| 39 |
Correct |
6 ms |
32376 KB |
Output is correct |
| 40 |
Correct |
9 ms |
32376 KB |
Output is correct |
| 41 |
Correct |
9 ms |
32376 KB |
Output is correct |
| 42 |
Correct |
3 ms |
32388 KB |
Output is correct |
| 43 |
Correct |
6 ms |
32984 KB |
Output is correct |
| 44 |
Correct |
9 ms |
33016 KB |
Output is correct |
| 45 |
Correct |
13 ms |
32640 KB |
Output is correct |
| 46 |
Correct |
9 ms |
32640 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 2 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 3 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 4 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 5 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 6 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 7 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 8 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 9 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 10 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 11 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 12 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 13 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 14 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 15 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 16 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 17 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 18 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 19 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 20 |
Correct |
3 ms |
32244 KB |
Output is correct |
| 21 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 22 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 23 |
Correct |
3 ms |
32112 KB |
Output is correct |
| 24 |
Correct |
3 ms |
32112 KB |
Output is correct |
| 25 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 26 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 27 |
Correct |
3 ms |
32244 KB |
Output is correct |
| 28 |
Correct |
3 ms |
32244 KB |
Output is correct |
| 29 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 30 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 31 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 32 |
Correct |
0 ms |
32112 KB |
Output is correct |
| 33 |
Correct |
3 ms |
32112 KB |
Output is correct |
| 34 |
Correct |
3 ms |
32112 KB |
Output is correct |
| 35 |
Correct |
9 ms |
32508 KB |
Output is correct |
| 36 |
Correct |
3 ms |
32244 KB |
Output is correct |
| 37 |
Correct |
3 ms |
32508 KB |
Output is correct |
| 38 |
Correct |
6 ms |
32648 KB |
Output is correct |
| 39 |
Correct |
6 ms |
32376 KB |
Output is correct |
| 40 |
Correct |
9 ms |
32376 KB |
Output is correct |
| 41 |
Correct |
9 ms |
32376 KB |
Output is correct |
| 42 |
Correct |
6 ms |
32388 KB |
Output is correct |
| 43 |
Correct |
9 ms |
32984 KB |
Output is correct |
| 44 |
Correct |
3 ms |
33016 KB |
Output is correct |
| 45 |
Correct |
16 ms |
32640 KB |
Output is correct |
| 46 |
Correct |
9 ms |
32640 KB |
Output is correct |
| 47 |
Correct |
9 ms |
32508 KB |
Output is correct |
| 48 |
Correct |
6 ms |
32640 KB |
Output is correct |
| 49 |
Correct |
6 ms |
32640 KB |
Output is correct |
| 50 |
Correct |
3 ms |
32508 KB |
Output is correct |
| 51 |
Correct |
19 ms |
32772 KB |
Output is correct |
| 52 |
Correct |
13 ms |
32772 KB |
Output is correct |
| 53 |
Correct |
9 ms |
32772 KB |
Output is correct |
| 54 |
Correct |
6 ms |
32112 KB |
Output is correct |
| 55 |
Correct |
3 ms |
32112 KB |
Output is correct |
| 56 |
Correct |
13 ms |
33036 KB |
Output is correct |
| 57 |
Correct |
0 ms |
32244 KB |
Output is correct |
| 58 |
Correct |
13 ms |
32980 KB |
Output is correct |
| 59 |
Correct |
13 ms |
32384 KB |
Output is correct |
| 60 |
Correct |
16 ms |
32392 KB |
Output is correct |
| 61 |
Correct |
23 ms |
32996 KB |
Output is correct |
| 62 |
Correct |
56 ms |
33036 KB |
Output is correct |
| 63 |
Correct |
113 ms |
32644 KB |
Output is correct |
| 64 |
Correct |
119 ms |
32508 KB |
Output is correct |
| 65 |
Correct |
99 ms |
32640 KB |
Output is correct |
| 66 |
Correct |
153 ms |
32640 KB |
Output is correct |
| 67 |
Correct |
79 ms |
32640 KB |
Output is correct |
