After Educational Codeforces Round 120, I went through all the successful hacks and found some suspicious hacks. A couple of submissions of problem A by an account called SIMON_MOLODETS have been successfully hacked. I got curious and viewed his code, and his is what I found: 140819355

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using namespace std; int main(){ int n; cin>>n; if(n!=67){ for(int i=0;i<n;i++){ int a; int b; int c; cin>>a>>b>>c; if(a+b==c or a+c==b or c+b==a) { cout<<"YES"<<"\n"; continue; } if((a==b and c%2==0) or (c==b and a%2==0) or (a==c and b%2==0)){ cout<<"YES"<<"\n"; continue; } else{ cout<<"NO"<<"\n"; } } } else{ for(int i=0;i<67;i++){ cout<<"NO"<<"\n"; } } }