CIELAB - Editorial

#include <bits/stdc++.h>

using namespace std;

int main() {
// your code goes here
int a,b,c;
string s;
cin>>a>>b;
c=a-b;
if(c%10==9){
c=c-1;
}else{
c=c+1;
}
cout<<c;
return 0;
}

i am newbie how can go ahead which problem should i choose.

@jainkarmesh
Try to Run this code
#include < iostream >
using namespace std;
int main()
{
int a,b;
cin>>a>>b;
int m=a-b;
int ch=m%10;
m=m/10;
for(int i=0;i<10;i++)
{
if(ch==i) continue;
else { m=m*10+i;break;}
}
cout<<m; return 0;

}

@vardhman811 Start with some video course of DSA you can find many of them on telegram along side solve DSA learning series provided by codechef.

//simplest sol.
int main(void) {
int a,b;string k;
cin>>a;cin>>b;
n=a-b;
k=to_string(n);
if(k[0]==‘1’){k[0]=‘9’;}
else{k[0]=k[0]-1;}
cout<<k;
}