#include <bits/stdc++.h> using namespace std; char s[1000]; bool flag = false; int main() { freopen("bit.in","r",stdin); freopen("bit.out","w",stdout); scanf("%s",s + 1); int sizee = strlen(s + 1); //printf("%d\n",sizee); for (int i = sizee; i >= 1; i--) { if (s[i] != '0') { s[i]--; break; } } for (int i = 1; i <= sizee; i++) { if (!flag && s[i] != '0') flag = 1; if (flag) printf("%c",s[i]); } if (!flag) printf("0"); printf("\n"); return 0; }