#include <bits/stdc++.h>

using namespace std;

using ll = long long;
#define REP(i, n) for (int i = 0; i < (n); i++)
template<class T> using V = vector<T>;

template<class T>
ostream &operator<<(ostream &os, const V<T> &v) {
    os << "[ ";
    for (auto &vi: v) os << vi << ", ";
    return os << "]";
}

template<class T, class U>
ostream &operator<<(ostream &os, const pair<T, U> &p) {
    return os << "{ " << p.first << ", " << p.second << "}";
}

#ifdef LOCAL
#define show(x) cerr << __LINE__ << " : " << #x << " = " << x << endl;
#else
#define show(x) true
#endif

int main() {
    string S;
    cin >> S;
    S.back() = 1 - S.back() + '0' + '0';
    cout << S << '\n';
    return 0;
}