Submission #1757846

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Source Code Expand

#include<iostream>
#include<iomanip>
#include<math.h>
#include<cstdlib>
#include<algorithm>
#include<string>
#include<set>
#include<vector>
using namespace std;

#define INF 1<<21
#define MOD 10e9+7

int main(){
    int a,b;
    string aa,bb;
    int ans;
    int ai,bi;
    cin>>a>>b;
    aa=to_string(a);
    aa[0]='9';
    ans=stoi(aa)-b;
    aa=to_string(a);
    aa[1]='9';
    ans=max(ans,stoi(aa)-b);
    aa=to_string(a);
    aa[2]='9';
    ans=max(ans,stoi(aa)-b);
    bb=to_string(b);
    bb[0]='1';
    ans=max(ans,a-stoi(bb));
    bb=to_string(b);
    bb[1]='0';
    ans=max(ans,a-stoi(bb));
    bb=to_string(b);
    bb[2]='0';
    ans=max(ans,a-stoi(bb));
    cout<<ans<<endl;
    return 0;
}

Submission Info

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