include<stdio.h>
int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }#include<stdio.h> int main(){
double f,c; scanf("%lf",&f); c=5*(f-32)/9; printf("%.5lf",c); return 0; }