%{
    int k = 0;
    int o = 0;
    int i = 0;
%}

%%
int|main|printf|scanf|char|if|else|for|switch|case k++;
[+*/%&=] o++;
[a-zA-Z_][a-zA-Z0-9_]* i++;
. ;
\n ;
%%

int main(void) {
    yylex();
    printf("%d keywords\n", k);
    printf("%d operators\n", o);
    printf("%d identifiers\n", i);
}

int yywrap() {
    return 1;
}