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#include <stdio.h> int main() { int a,b,c[100],d[100],k=0,p=0,i,j,s=0; scanf("%d\n",&a); while(a--) { scanf("%d",&b); for(i=0;i<b;i++) scanf("%d",&c[i]); for(i=0;i<b;i++) scanf("%d",&d[i]); for (i = 0; i < b; i++) { for (j = i + 1; j < b; j++) { if (c[i] > c[j]) { p = c[i]; c[i] = c[j]; c[j] = p; } if (d[i] > d[j]) { k = d[i]; d[i] = d[j]; d[j] = k; } } } i=0; do { for(j=0;j<b;j++) { if(d[i]>=c[j] && i<b) { s++; i++; } } i++; }while(i<b); printf("%d\n",s); s=0; } return 0; }
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