#include<bits/stdc++.h>
  using namespace std;
  int main() {
    long long N, rev = 0;
    cin >> N;
    long long sign = N < 0 ? -1 : 1;
    N = sign == -1 ? -N : N;
	while (N > 0) {
        rev = rev * 10 + N % 10;
        N /= 10;
    }
    cout << rev * sign;
    return 0;
}

#include #include #include

using namespace std;

int main() { int num; cin >> num;

// 处理零的情况
if (num == 0) {
    cout << "0" << endl;
    return 0;
}

// 处理符号
bool isNegative = false;
if (num < 0) {
    isNegative = true;
    num = -num;
}

// 将数字转换为字符串
string numStr = to_string(num);

// 反转字符串
reverse(numStr.begin(), numStr.end());

// 去除前导零
int leadingZeros = 0;
while (leadingZeros < numStr.length() && numStr[leadingZeros] == '0') {
    leadingZeros++;
}
numStr = numStr.substr(leadingZeros);

// 恢复符号
if (isNegative) {
    numStr = "-" + numStr;
}

// 输出结果
cout << numStr << endl;

return 0;

}