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hsg/12/QG-2017/virus.c: Improve performance (still shitty though)

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Nguyễn Gia Phong 2017-06-28 14:53:04 +07:00
parent 6f155876ee
commit 1f60c2ea7b
2 changed files with 50 additions and 36 deletions
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77
12/QG-2017/virus.c
View file

@ -1,22 +1,31 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char difflim(char lim, char *s, short len)
{
char i, count = 0;
char T[3001], **mem;
char difflim(char lim, short len, short beg)
{
char count = 0, *s, *z;
short i;
if (mem[len - 1][beg] >= 0)
return mem[len - 1][beg] <= lim;
s = T + beg;
z = s + len;
for (i = 0; i < len; i++)
if (s[i] != s[len + i] && ++count > lim)
return 0;
return 1;
if ((count += s[i] != z[i]) > 10)
break;
return (mem[len - 1][beg] = count) <= lim;
}
int main() {
FILE *f = fopen("VIRUS.INP", "r");
char i, n, level, T[3001], levels[10];
char i, n, level, *levels;
short m, j, k, len, lenpos, pos[3000], res[11] = {};
fscanf(f, "%hhd\n%s\n", &n, T);
levels = malloc(n);
for (i = 0; i < n; i++)
fscanf(f, "%hhd\n", levels + i);
fclose(f);
@ -45,27 +54,41 @@ int main() {
}
}
f = fopen("VIRUS.OUT", "w");
for (i = 0; i < n; i++) {
level = levels[i];
if (level && !res[level]) {
if (level * 2 > m)
res[level] = m / 2;
else
res[level] = level;
for (j = 0; j < level; j++)
if (res[j] > res[level])
res[level] = res[j];
for (len = m / 2; len > res[level]; len--)
for (j = 0; j <= m - len * 2; j++)
if (difflim(level, T + j, len)) {
res[level] = len;
break;
}
}
fprintf(f, "%hd\n", res[level]);
mem = malloc(m * sizeof(char *) / 2);
for (len = 0; len < m / 2; len++) {
mem[len] = malloc(m - len * 2);
for (j = 0; j < m - len * 2; j++)
mem[len][j] = -1;
}
for (level = 1; level <= 10; level++) {
for (i = j = 0; i < n; i++)
if (levels[i] == level)
j++;
if (!j)
continue;
if (level * 2 > m) {
res[level] = m / 2;
continue;
}
res[level] = level;
for (j = 0; j < level; j++)
if (res[j] > res[level])
res[level] = res[j];
for (len = m / 2; len > res[level]; len--)
for (j = 0; j <= m - len * 2; j++)
if (difflim(level, len, j)) {
res[level] = len;
break;
}
}
f = fopen("VIRUS.OUT", "w");
for (i = 0; i < n; i++)
fprintf(f, "%hd\n", res[levels[i]]);
fclose(f);
return 0;
}

9
12/QG-2017/virus_randinp.py
View file

@ -1,9 +0,0 @@
#!/usr/bin/env python3
import random
import string
with open('VIRUS.INP', 'w') as f:
f.write('10\n')
for _ in range(3000):
f.write(random.choice(string.ascii_lowercase))
f.write('\n0\n1\n2\n3\n5\n6\n7\n8\n9\n10\n')