#include <stdio.h>
#include <string.h>
#include <math.h>
void len( char a[ 100 ] ) {
int chu, so, kytudb;
int i;
for ( i = 0 ; i < n; i++ ) {
if ( a[ i] >= 65 && a[ i] <= 90 || a[ i] >= 97 && a[ i] <= 122 ) {
chu++;
}
else if ( a[ i] >= 48 && a[ i] <= 57 ) {
so++;
}
else {
kytudb++;
}
}
if ( chu >= 4 && so >= 1 && kytudb >= 1 ) {
} else {
}
}
main( ) {
char chuoi[ 50 ] ;
len( chuoi) ;
}
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