%{ 
#include <stdio.h>
int valid_int=0, valid_float=0; 
%} 
 
%% 
^[-+]?[0-9]+(\.[0-9]+)?$ { 
    if(strchr(yytext, '.')) 
        valid_float++; 
    else 
        valid_int++; 
} 
.* { /* Ignore other inputs */ }
%% 
 
int main() 
{ 
    yylex(); 
    if(valid_float) 
        printf("Valid Float number\n"); 
    else if(valid_int) 
        printf("Valid Integer number\n"); 
    else 
        printf("Not valid Integer/Float number\n"); 
 
    return 0; 
} 
 
int yywrap() { return 1; }
 

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