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#include <iostream> #include <cmath> #include <iomanip> using namespace std; int main() { int x,bin; cin >> x; do { bin = 0; for(int i = 0; i < 4; i++) { bin += (x & 0x01)*pow(2,i); x = x >> 1; } cout << uppercase << hex << bin; }while(x); cout << endl; return 0; }
