UVA 11278 - One-Handed Typist

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#define sc scanf
#define pf printf
#define ll long long
#define pi 2*acos(0.0)

#define ff first
#define se second
#define inf (1<<30)                                              //infinity value
#define pb push_back
#define mod  1000000007
#define ST(v) sort(v.begin(),v.end())
#define cover(a,d) memset(a,d,sizeof(a))
#define input freopen("in.txt","r",stdin)
#define output freopen("out.txt","w",stdout)
#define maxall(v) *max_element(v.begin(),v.end())
#define minall(v) *min_element(v.begin(),v.end())
#define un(v) ST(v), v.erase(unique(v.begin(),v.end()),v.end())

using namespace std;

ll gcd(ll a, ll b)
{
	if (b==0) return a;
	return gcd(b, a%b);
}

ll lcm(ll a, ll b)
{
	return a/gcd(a, b)*b;
}

bool cmp(ll a,ll b)
{
    return a > b;
}
int main()
{
    string a="`1234567890-=qwertyuiop[]\\asdfghjkl;'zxcvbnm,./";
    string ares="`123qjlmfp/[]456.orsuyb;=\\789aehtdck-0zx,inwvg'";
    string b="~!@#$%^&*()_+QWERTYUIOP{}|ASDFGHJKL:\"ZXCVBNM<>?";
    string bres="~!@#QJLMFP?{}$%^>ORSUYB:+|&*(AEHTDCK_)ZX