Could you please tell me what is wrong with my code because the results i take after i compile it are wrong

ps.This is my first programm in C

Code:
#include <stdio.h>
#include <stdlib.h>

int main(){
   float V, Imax, Imin;
    int n, i;
    printf("Dwste ton arithmo twn antistasewn\n");
    scanf("%d", &n);
    printf("Dwste thn timh ths tashs V\n");
    scanf("%f", &V);
    printf("Dwste thn megisth timh ths entashs tou reumatos\n");
    scanf("%f", &Imax);
    printf("Dwste thn elaxisth timh ths entashs tou reumatos\n");
    scanf("%f", &Imin);
    float Rmax=0., Rmin, Srow=0., Spar=0., R;
    int counter=0;
    for (i=0; i<n; i++ ) {
     printf("Dwste thn timh thw antistashs se om\n");
     scanf("%f", &R);
     if (R>0) {

       if ( (Imin<=V/R) && (V/R<=Imax) ) {
       Srow=Srow+R;
       Spar=Spar+1./R;
       counter=counter+1;
         if (i==0){
         Rmin=R; }
         else {
          if (R>Rmax){
          Rmax=R;} // end if
          if (R<Rmin) {
          Rmin=R; } // end if
          } // end if


          }
        else {
         printf("H entash tou reumatos pou diaperna auth thn antistash den anhkei sta epitrepta oria\n"); } // end if
         } // end if
    else{
     printf("H timh thw antistashs prepei na einai megaluterh tou mhdenos\n"); } // end if
     } // end for
     Spar=1./Spar;
printf("%d Oi antistaseis pou eginan dektes htan sunolika\t", counter);
printf("%f H timh ths megaluterhs antistashs htan\t", Rmax, "\n" );
printf("%f H timh ths mikroterhs antistashs htan\t", Rmin, "\n" );
printf("%f An oi antistaseis sundeontan se seira tote h sunolikh antistash tha htan\t" ,Srow, "OM\n");
printf("%f An oi antistaseis sundeontan parallhla tote h sunolikh antistash tha htan\t" ,Spar, "OM\n");

}