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-rw-r--r--Semestr 4/ask/lista11/gen.py65
-rw-r--r--Semestr 4/ask/lista11/zad8.c23
2 files changed, 88 insertions, 0 deletions
diff --git a/Semestr 4/ask/lista11/gen.py b/Semestr 4/ask/lista11/gen.py
new file mode 100644
index 0000000..d4de762
--- /dev/null
+++ b/Semestr 4/ask/lista11/gen.py
@@ -0,0 +1,65 @@
+def next_permutation(a):
+ """Generate the lexicographically next permutation inplace.
+
+ https://en.wikipedia.org/wiki/Permutation#Generation_in_lexicographic_order
+ Return false if there is no next permutation.
+ """
+ # Find the largest index i such that a[i] < a[i + 1]. If no such
+ # index exists, the permutation is the last permutation
+ for i in reversed(range(len(a) - 1)):
+ if a[i] < a[i + 1]:
+ break # found
+ else: # no break: not found
+ return False # no next permutation
+
+ # Find the largest index j greater than i such that a[i] < a[j]
+ j = next(j for j in reversed(range(i + 1, len(a))) if a[i] < a[j])
+
+ # Swap the value of a[i] with that of a[j]
+ a[i], a[j] = a[j], a[i]
+
+ # Reverse sequence from a[i + 1] up to and including the final element a[n]
+ a[i + 1:] = reversed(a[i + 1:])
+ return True
+
+def perm_to_str(a):
+ return ''.join(map(str, a))
+
+def str_to_perm(s):
+ return [int(c) for c in s]
+
+t = [0,1,2,3]
+perm_to_idx = dict()
+
+def bbin(x):
+ return bin(x)[2:]
+
+cnt = 23
+while True:
+ perm_to_idx[perm_to_str(t)] = cnt
+ cnt -= 1
+ if not next_permutation(t):
+ break
+
+for p in perm_to_idx.keys():
+ for i in range(4):
+ t = str_to_perm(p)
+ for j in range(4):
+ if t[j] > t[i]:
+ t[j] -= 1
+ t[i] = 3
+ print(p, 'x', i, '->', perm_to_str(t), ':\t', bbin(perm_to_idx[p]), '\t', bbin(i), '\t', bbin(perm_to_idx[perm_to_str(t)]), end='\t')
+ print(perm_to_idx[p], '\t', i, '\t', perm_to_idx[perm_to_str(t)])
+
+print('\n-----\n')
+
+
+for p in perm_to_idx.keys():
+ for i in range(4):
+ t = str_to_perm(p)
+ for j in range(4):
+ if t[j] > t[i]:
+ t[j] -= 1
+ t[i] = 3
+ print(p, 'x', i, '->', perm_to_str(t), ':\t', bbin(perm_to_idx[p]), '\t', bbin(i), '\t', bbin(perm_to_idx[perm_to_str(t)]), end='\t')
+ print(perm_to_idx[p], '\t', i, '\t', perm_to_idx[perm_to_str(t)])
diff --git a/Semestr 4/ask/lista11/zad8.c b/Semestr 4/ask/lista11/zad8.c
new file mode 100644
index 0000000..cd8c2bf
--- /dev/null
+++ b/Semestr 4/ask/lista11/zad8.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <stdint.h>
+
+uint8_t victim(uint8_t s) {
+ s |= ((s & 0x55) << 1) | (s & 0xaa >> 1);
+ return ((s >> 2) && 1) | ((s >> 4) && 2) | ((s >> 6) && 3);
+}
+
+uint8_t update(uint8_t s, uint8_t v) {
+ int8_t p0 = victim(s);
+ int8_t p1 = victim(s ^ 0b01010101);
+ int8_t p2 = victim(s ^ 0b10101010);
+ int8_t p3 = victim(s ^ 0b11111111);
+ uint8_t age = (3 << (v << 1)) & s;
+
+ s -= (~((char)(age - 1) >> 7)) & (1 << (p1 << 1));
+ s -= (~((char)(age - 2) >> 7)) & (1 << (p2 << 1));
+ s -= (~((char)(age - 3) >> 7)) & (1 << (p3 << 1));
+ s |= (3 << (v << 1));
+ return s;
+}
+
+int main() {} \ No newline at end of file