#include <iostream> #include <string> using namespace std; string toHexString(int n); int main() { int n; cin >> n; string hexStr = toHexString(n); cout << hexStr << endl; return 0; } string toHexString(int n) { // write your code here...... string s=""; while(n!=0) { int x=n%16; if(x>=0&&x<=9) { char c=x+'0'; s=c+s; } else { char c=x-10+'A'; s=c+s; } n/=16; } return s; }