Purva

#include <iostream>

using namespace std;

bool hasRepeatedDigit(int);

int main() {
    int num;
    cin >> num;
    if (hasRepeatedDigit(num)) {
        cout << "Contains a digit twice";
    } else {
        cout << "Digits don't repeat";
    }
    return 0;
}

bool hasRepeatedDigit(int num) {
    int countOne = 0;
    int countTwo = 0;
    int countThree = 0;
    int countFour = 0;
    int countFive = 0;
    int countSix = 0;
    int countSeven = 0;
    int countEight = 0;
    int countNine = 0;
    int countZero = 0;

    while (num > 0) {
        int lastDigit = num % 10;

        switch (lastDigit) {
            case 0:
                countZero++;
                if (countZero == 2) {
                    return true;
                }
                break;
            case 1:
                countOne++;
                if (countOne == 2) {
                    return true;
                }
                break;
            case 2:
                countTwo++;
                if (countTwo == 2) {
                    return true;
                }
                break;
            case 3:
                countThree++;
                if (countThree == 2) {
                    return true;
                }
                break;
            case 4:
                countFour++;
                if (countFour == 2) {
                    return true;
                }
                break;
            case 5:
                countFive++;
                if (countFive == 2) {
                    return true;
                }
                break;
            case 6:
                countSix++;
                if (countSix == 2) {
                    return true;
                }
                break;
            case 7:
                countSeven++;
                if (countSeven == 2) {
                    return true;
                }
                break;
            case 8:
                countEight++;
                if (countEight == 2) {
                    return true;
                }
                break;
            case 9:
                countNine++;
                if (countNine == 2) {
                    return true;
                }
                break;
        }

        if (lastDigit == 1) {
            countOne++;
            if (countOne == 2) {
                return true;
            }
        } else if (lastDigit == 2) {
            countTwo++;
            if (countTwo == 2) {
                return true;
            }
        } else if (lastDigit == 3) {
            countThree++;
            if (countThree == 2) {
                return true;
            }
        } else if (lastDigit == 4) {
            countFour++;
            if (countFour == 2) {
                return true;
            }
        } else if (lastDigit == 5) {
            countFive++;
            if (countFive == 2) {
                return true;
            }
        } else if (lastDigit == 6) {
            countSix++;
            if (countSix == 2) {
                return true;
            }
        } else if (lastDigit == 7) {
            countSeven++;
            if (countSeven == 2) {
                return true;
            }
        } else if (lastDigit == 8) {
            countEight++;
            if (countEight == 2) {
                return true;
            }
        } else if (lastDigit == 9) {
            countEight++;
            if (countEight == 2) {
                return true;
            }
        }
        num /= 10;
    }

    return false;
}