Submission

Score: 100

User: Krovmoroz

Problemset: แปลงเลขฐาน

Language: cpp

Time: 0.002 second

Submitted On: 2025-11-04 18:05:00

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    string hex;
    cin >> hex;

    // ตารางแปลง 0-F → binary 4 บิต
    const string binTable[16] = {
        "0000","0001","0010","0011",
        "0100","0101","0110","0111",
        "1000","1001","1010","1011",
        "1100","1101","1110","1111"
    };

    bool started = false;
    for (char c : hex) {
        int v = (c <= '9') ? c - '0' : toupper(c) - 'A' + 10;
        string bits = binTable[v];
        if (!started) {
            size_t pos = bits.find('1');
            if (pos == string::npos) continue; // ทั้ง 4 บิตเป็นศูนย์
            bits = bits.substr(pos);
            started = true;
        }
        cout << bits;
    }
    if (!started) cout << 0;

    // พิมพ์ฐาน 8 แบบรวดเดียวด้วย printf
    unsigned int x;
    sscanf(hex.c_str(), "%x", &x);
    printf("\n%o", x);
}