#include <stdio.h>
#include <stdint.h>
uint32_t convert_endian(uint32_t value) {
uint32_t t=0;
for(int i=0;i<4;i++){
t|=((value>>(8*i))&0xFF)<<(8*(3-i));
}
return t;
}
int main() {
uint32_t val;
scanf("%u", &val);
printf("%u", convert_endian(val));
return 0;
}