Function insert_vector

Additional Problems I/Square Subsets.cpp:37–47

}

bool insert_vector(bitset<SIZE> mask){
    for(int i = SIZE-1; i >= 0; i--){
        if(mask[i] == 0)  continue;
        if(!basis[i].any()){
            basis[i] = mask;
            return true;
        }
        mask ^= basis[i];
    }
    return false;
}

int main(){
    scanf("%d", &N);