int win(int a[]){
int b[11];
int i=0 ;
int ret= 0;
set(b);
for(i=0 ; i< 11 ; i++){
if ( valid1(i,a) ){
copy(b,a);
put1(i,b);
ret|= !win(b);
}
if ( valid2(i,a) ){
copy(b,a);
put2(i,b);
ret|= !win(b);
}
if ( valid3(i,a) ){
copy(b,a);
put3(i,b);
ret|= !win(b);
}
}
return ret;
}
bool valid(int*nums){
double a = nums[0], b = nums[1], c = nums[2], d = nums[3];
if (valid3(a+b, c, d) || valid3(a-b, c, d) || valid3(a*b, c, d) || valid3(a/b, c, d)) return true;
if (valid3(a, b+c, d) || valid3(a, b-c, d) || valid3(a, b*c, d) || valid3(a, b/c, d)) return true;
if (valid3(a, b, c+d) || valid3(a, b, c-d) || valid3(a, b, c*d) || valid3(a, b, c/d)) return true;
return false;
}
