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int pow( int a , int b , int c ){
    int ans = 1;    
    while( b ){
        if( b&1 ) ans = ( 1LL*ans * a )%c;
        a = ( 1LL*a*a )%c;
        b >>= 1;
    }   
    return ans;
}
bool miller(ll p, int it = 10){
    if(p < 2) return 0;
    if(p != 2 && (p & 1) == 0) return 0;
    int s = p - 1;
    while( (s & 1) == 0) s >>= 1;
    while( it-- ){
        int a = rand() % (p - 1) + 1, temp = s;
        int mod = pow(a, temp, p);
        while(temp != p - 1 && mod != 1 && mod != p - 1){
            mod = ( 1LL* mod*mod )%p;
            temp <<= 1;
        }
        if(mod != p - 1 && (temp & 1) == 0) return 0;
    }
    return 1;
}

prog.cpp:10:13: error: ‘ll’ was not declared in this scope
 bool miller(ll p, int it = 10){
             ^
prog.cpp:10:19: error: expected primary-expression before ‘int’
 bool miller(ll p, int it = 10){
                   ^
prog.cpp:10:30: error: expression list treated as compound expression in initializer [-fpermissive]
 bool miller(ll p, int it = 10){
                              ^
prog.cpp:10:31: error: expected ‘,’ or ‘;’ before ‘{’ token
 bool miller(ll p, int it = 10){
                               ^

Standard output is empty