Trouble with rolling hash implementation
int MUL = 37;
int MOD = 9999991;

for(int i = 1 , pwr = 1 ; i < plen ; i++) pwr = (pwr * MUL) % MOD;
long long hash = number[0];
long long revHash = number[plen - 1];
for(int i = 1 ; i < plen  ; i++)
{
    hash = (MUL*hash + number[i])%MOD;
    revHash = (revHash*MUL + number[plen - i - 1])%MOD;

}

cout << hash << " " << revHash <<"n";

int cnt = (hash == revHash);

for(int i = plen ; i < numbers ; i++)
{
    hash = (hash + (MOD - pwr)*number[i - plen])%MOD;
    hash = (hash*MUL + number[i])%MOD;


    revHash = ((revHash + MOD - number[i - plen]))%MOD;
    revHash = (revHash + pwr*number[i])%MOD;

    cnt += (hash == revHash);

    cout << hash << " " << revHash << "n";

}