QOJ.ac
QOJ
| ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
|---|---|---|---|---|---|---|---|---|---|
| #481605 | #5141. Identical Parity | 333zhan | WA | 5ms | 3736kb | C++20 | 1.4kb | 2024-07-17 11:14:53 | 2024-07-17 11:14:53 |
Judging History
answer
#include <bits/stdc++.h>
#define int long long
using namespace std;
inline int read () {
int w = 1, s = 0; char ch = getchar ();
for (; ! isdigit (ch); ch = getchar ()) if (ch == '-') w = -1;
for (; isdigit (ch); ch = getchar ()) s = (s << 1) + (s << 3) + (ch ^ 48);
return s * w;
}
void solve () {
int n = read (), k = read ();
if (n == 1) {
printf ("Yes\n");
return;
}
if (k == 1) {
printf ("No\n");
return;
}
if (k & 1 ^ 1) {
printf ("Yes\n");
return;
}
int t = n / k;
int sum1 = (n + 1) / 2, sum2 = n - sum1;
int a = t * (k / 2), b = t * ((k + 1) / 2);
int w = n % k;
if (b + min (w, (k + 1) / 2) == sum1 && a + max (0LL, w - (k + 1) / 2) == sum2) {
printf ("Yes\n");
return;
}
if (b + max (0LL, w - k / 2) == sum1 && a + min (w, k / 2) == sum2) {
printf ("Yes\n");
return;
}
printf ("No\n");
}
signed main () {
// ios::sync_with_stdio (false);
// cin.tie (nullptr);
int T = 1;
// cin >> T;
T = read ();
while (T --) {
solve ();
}
return 0;
}
/*
4 3
1 2 3 4
2 1 3 4
6 3
2 1 3 4 5 6
x
y
n / k
9 3
1 1 0 1 1 0 1 1 0
0 1 1 0 1 1 0 1 1
0 0 1 0 1 0 1 0 1
9 5
0 0 1 1 1 0 0 1 1
7 3
2 1 3 4 5 7 6
0 1 1 0 1 1 0
8 5
0 0 1 1 1 0 0 1
*/
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 3724kb
input:
3 3 1 4 2 5 3
output:
No Yes Yes
result:
ok 3 token(s): yes count is 2, no count is 1
Test #2:
score: -100
Wrong Answer
time: 5ms
memory: 3736kb
input:
100000 1 1 2 1 2 2 3 1 3 2 3 3 4 1 4 2 4 3 4 4 5 1 5 2 5 3 5 4 5 5 6 1 6 2 6 3 6 4 6 5 6 6 7 1 7 2 7 3 7 4 7 5 7 6 7 7 8 1 8 2 8 3 8 4 8 5 8 6 8 7 8 8 9 1 9 2 9 3 9 4 9 5 9 6 9 7 9 8 9 9 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 10 10 11 1 11 2 11 3 11 4 11 5 11 6 11 7 11 8 11 9 11 10 11 11 12 1 ...
output:
Yes No Yes No Yes Yes No Yes Yes Yes No Yes Yes Yes Yes No Yes No Yes Yes Yes No Yes Yes Yes No Yes Yes No Yes No Yes Yes Yes Yes Yes No Yes No Yes Yes Yes No Yes Yes No Yes No Yes No Yes No Yes Yes Yes No Yes No Yes Yes Yes No Yes No Yes Yes No Yes No Yes Yes Yes Yes Yes No Yes Yes Yes No Yes No Ye...
result:
wrong answer expected YES, found NO [26th token]