#include <stdio.h>
#define N 100000
#define M 100000
#define N_ ((N + 1) * 2 + (M + 1) * 2)
int main() {
static int dd[N_], qu[N_];
int n, m, n_, cnt, h, a, a_, b, b_, u, v, d;
scanf("%d%d%d%d", &n, &m, &a_, &b_), n_ = (n + 1) * 2 + (m + 1) * 2;
for (u = 0; u < n_; u++)
dd[u] = n_;
cnt = 0;
dd[0] = 0, qu[cnt++] = 0;
for (h = 0; h < cnt; h++) {
u = qu[h], d = dd[u];
if (u <= n)
a = u, b = 0;
else if ((u -= n + 1) <= n)
a = u, b = m;
else if ((u -= n + 1) <= m)
a = 0, b = u;
else {
u -= m + 1;
a = n, b = u;
}
if (a == a_ && b == b_) {
printf("%d\n", d);
return 0;
}
d++;
v = a;
if (dd[v] > d)
dd[v] = d, qu[cnt++] = v;
v = (n + 1) + a;
if (dd[v] > d)
dd[v] = d, qu[cnt++] = v;
v = (n + 1) * 2 + b;
if (dd[v] > d)
dd[v] = d, qu[cnt++] = v;
v = (n + 1) * 2 + (m + 1) + b;
if (dd[v] > d)
dd[v] = d, qu[cnt++] = v;
v = a + b <= m ? (n + 1) * 2 + a + b : (n + 1) + a + b - m;
if (dd[v] > d)
dd[v] = d, qu[cnt++] = v;
v = a + b <= n ? a + b : (n + 1) * 2 + (m + 1) + a + b - n;
if (dd[v] > d)
dd[v] = d, qu[cnt++] = v;
}
printf("-1\n");
return 0;
}
Compilation message
bucket.cpp: In function 'int main()':
bucket.cpp:11:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
11 | scanf("%d%d%d%d", &n, &m, &a_, &b_), n_ = (n + 1) * 2 + (m + 1) * 2;
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
1 ms |
344 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 |
1 ms |
604 KB |
Output is correct |
8 |
Correct |
1 ms |
1184 KB |
Output is correct |
9 |
Correct |
1 ms |
1116 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
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 |
1 ms |
344 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 |
1 ms |
604 KB |
Output is correct |
8 |
Correct |
1 ms |
1184 KB |
Output is correct |
9 |
Correct |
1 ms |
1116 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
0 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 |
0 ms |
344 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
0 ms |
348 KB |
Output is correct |
19 |
Correct |
1 ms |
1312 KB |
Output is correct |
20 |
Correct |
1 ms |
1372 KB |
Output is correct |
21 |
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 |
344 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 |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Output is correct |
2 |
Correct |
1 ms |
344 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 |
1 ms |
604 KB |
Output is correct |
8 |
Correct |
1 ms |
1184 KB |
Output is correct |
9 |
Correct |
1 ms |
1116 KB |
Output is correct |
10 |
Correct |
1 ms |
348 KB |
Output is correct |
11 |
Correct |
0 ms |
348 KB |
Output is correct |
12 |
Correct |
0 ms |
348 KB |
Output is correct |
13 |
Correct |
0 ms |
344 KB |
Output is correct |
14 |
Correct |
0 ms |
348 KB |
Output is correct |
15 |
Correct |
0 ms |
348 KB |
Output is correct |
16 |
Correct |
0 ms |
348 KB |
Output is correct |
17 |
Correct |
0 ms |
348 KB |
Output is correct |
18 |
Correct |
1 ms |
1312 KB |
Output is correct |
19 |
Correct |
1 ms |
1372 KB |
Output is correct |
20 |
Correct |
0 ms |
348 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 |
344 KB |
Output is correct |
24 |
Correct |
0 ms |
348 KB |
Output is correct |
25 |
Correct |
0 ms |
348 KB |
Output is correct |
26 |
Correct |
0 ms |
348 KB |
Output is correct |
27 |
Correct |
0 ms |
348 KB |
Output is correct |
28 |
Correct |
0 ms |
348 KB |
Output is correct |
29 |
Correct |
0 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 |
344 KB |
Output is correct |
33 |
Correct |
0 ms |
348 KB |
Output is correct |
34 |
Correct |
2 ms |
2652 KB |
Output is correct |
35 |
Correct |
0 ms |
348 KB |
Output is correct |
36 |
Correct |
0 ms |
348 KB |
Output is correct |
37 |
Correct |
1 ms |
348 KB |
Output is correct |
38 |
Correct |
0 ms |
348 KB |
Output is correct |
39 |
Correct |
0 ms |
348 KB |
Output is correct |
40 |
Correct |
0 ms |
604 KB |
Output is correct |
41 |
Correct |
1 ms |
604 KB |
Output is correct |
42 |
Correct |
1 ms |
856 KB |
Output is correct |
43 |
Correct |
1 ms |
1112 KB |
Output is correct |
44 |
Correct |
1 ms |
688 KB |
Output is correct |
45 |
Correct |
1 ms |
860 KB |
Output is correct |
46 |
Correct |
3 ms |
3420 KB |
Output is correct |