Submission #1679585

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Source Code Expand

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

#define REP(i,n) for(int i=0;i<n;i++)
#define REPR(i,n) for(int i=n;i>=0;i--)
#define FOR(i,m,n) for(int i=m;i<n;i++)
#define EPS (1e-7)
#define INF 1e9

typedef long long ll;
typedef pair<int,int> pii;
int vx[]={0,1,0,-1};
int vy[]={1,0,-1,0};

int main(){
	string a;
	cin>>a;
	if(a.size()>1){
		REP(i,a.size()-1){
			cout<<a[i];
		}
		cout<<endl;
	}else{
		if(a[0]-'a'==0)cout<<-1<<endl;
		else cout<<(char)(a[0]-1)<<endl;
	}
	return 0;
}

Submission Info

Judge Result