hsg/12/QG-2017/virus.c: Improve performance (still shitty though)
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6f155876ee
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1f60c2ea7b
2 changed files with 50 additions and 36 deletions
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@ -1,22 +1,31 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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char difflim(char lim, char *s, short len)
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{
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char i, count = 0;
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char T[3001], **mem;
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char difflim(char lim, short len, short beg)
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{
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char count = 0, *s, *z;
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short i;
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if (mem[len - 1][beg] >= 0)
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return mem[len - 1][beg] <= lim;
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s = T + beg;
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z = s + len;
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for (i = 0; i < len; i++)
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if (s[i] != s[len + i] && ++count > lim)
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return 0;
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return 1;
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if ((count += s[i] != z[i]) > 10)
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break;
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return (mem[len - 1][beg] = count) <= lim;
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}
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int main() {
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FILE *f = fopen("VIRUS.INP", "r");
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char i, n, level, T[3001], levels[10];
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char i, n, level, *levels;
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short m, j, k, len, lenpos, pos[3000], res[11] = {};
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fscanf(f, "%hhd\n%s\n", &n, T);
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levels = malloc(n);
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for (i = 0; i < n; i++)
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fscanf(f, "%hhd\n", levels + i);
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fclose(f);
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@ -45,27 +54,41 @@ int main() {
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}
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}
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f = fopen("VIRUS.OUT", "w");
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for (i = 0; i < n; i++) {
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level = levels[i];
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if (level && !res[level]) {
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if (level * 2 > m)
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res[level] = m / 2;
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else
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res[level] = level;
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for (j = 0; j < level; j++)
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if (res[j] > res[level])
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res[level] = res[j];
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for (len = m / 2; len > res[level]; len--)
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for (j = 0; j <= m - len * 2; j++)
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if (difflim(level, T + j, len)) {
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res[level] = len;
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break;
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}
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}
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fprintf(f, "%hd\n", res[level]);
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mem = malloc(m * sizeof(char *) / 2);
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for (len = 0; len < m / 2; len++) {
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mem[len] = malloc(m - len * 2);
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for (j = 0; j < m - len * 2; j++)
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mem[len][j] = -1;
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}
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for (level = 1; level <= 10; level++) {
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for (i = j = 0; i < n; i++)
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if (levels[i] == level)
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j++;
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if (!j)
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continue;
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if (level * 2 > m) {
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res[level] = m / 2;
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continue;
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}
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res[level] = level;
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for (j = 0; j < level; j++)
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if (res[j] > res[level])
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res[level] = res[j];
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for (len = m / 2; len > res[level]; len--)
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for (j = 0; j <= m - len * 2; j++)
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if (difflim(level, len, j)) {
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res[level] = len;
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break;
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}
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}
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f = fopen("VIRUS.OUT", "w");
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for (i = 0; i < n; i++)
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fprintf(f, "%hd\n", res[levels[i]]);
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fclose(f);
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return 0;
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}
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@ -1,9 +0,0 @@
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#!/usr/bin/env python3
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import random
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import string
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with open('VIRUS.INP', 'w') as f:
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f.write('10\n')
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for _ in range(3000):
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f.write(random.choice(string.ascii_lowercase))
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f.write('\n0\n1\n2\n3\n5\n6\n7\n8\n9\n10\n')
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