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04: C: Optimize 

sscanf is a bottleneck
This commit is contained in:
Mia Herkt 2022-12-06 21:32:16 +01:00
parent cbb0c57d81
commit f94c3eb3cb
Signed by: mia
GPG Key ID: 72E154B8622EC191
1 changed files with 7 additions and 1 deletions
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04/solution.c
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@ -1,9 +1,15 @@
#include <stdio.h> #include <stdio.h>
#include <ctype.h>
int main(void) { int main(void) {
int a, b, c, d, S = 0, G = 0; int a, b, c, d, S = 0, G = 0;
char l[64], *e;
while (scanf("%u-%u,%u-%u", &a, &b, &c, &d) == 4) { while (fgets(l, 64, stdin)) {
a = b = c = d = 0;
e = l;
#define rdec(V) { while (isdigit(*e)) V = 10 * V + (*e++ - '0'); e++; }
rdec(a) rdec(b) rdec(c) rdec(d)
S += (a >= c && b <= d) || (c >= a && d <= b); S += (a >= c && b <= d) || (c >= a && d <= b);
G += (a <= c && b >= c) || (c <= a && d >= a); G += (a <= c && b >= c) || (c <= a && d >= a);
} }