29 lines
339 B
C
29 lines
339 B
C
#include <stdio.h>
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int main()
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{
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short m, n, i, j, v = 0;
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long a[10000], b;
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scanf("%hd %hd", &n, &m);
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for (i = 0; i < n; i++)
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scanf("%ld", &a[i]);
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i = 0;
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for (j = 0; j < m; j++) {
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if (i >= n)
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break;
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scanf("%ld", &b);
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while (b > a[i])
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i++;
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if (b == a[i]) {
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v++;
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i++;
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}
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}
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printf("%hd\n", v);
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return 0;
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}
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