Language: C++

#pragma GCC optimize("Ofast")
#include<bits/stdc++.h>
using namespace std;
using ll=long long;
using datas=pair<ll,ll>;
using ddatas=pair<double,double>;
using tdata=pair<ll,datas>;
using vec=vector<ll>;
using mat=vector<vec>;
using pvec=vector<datas>;
using pmat=vector<pvec>;
#define For(i,a,b) for(i=a;i<b;i++)
#define bFor(i,a,b) for(i=a;i>=b;i--)
#define rep(i,N) For(i,0,N)
#define rep1(i,N) For(i,1,N)
#define brep(i,N) bFor(i,N-1,0)
#define all(v) (v).begin(),(v).end()
#define allr(v) (v).rbegin(),(v).rend()
#define vsort(v) sort(all(v))
#define vrsort(v) sort(allr(v))
#define endl "\n"
#define pb push_back
#define output(v) do{bool f=0;for(auto outi:v){cout<<(f?" ":"")<<outi;f=1;}cout<<endl;}while(0)
const ll mod=1000000007;
const ll inf=1LL<<60;
template<class T> inline bool chmax(T& a,T b){bool x=a<b;if(x)a=b;return x;} 
template<class T> inline bool chmin(T& a,T b){bool x=a>b;if(x)a=b;return x;} 

double distance(ddatas& x,ddatas& y){
  double a=x.first-y.first,b=x.second-y.second;
  return sqrt(a*a+b*b);
}

ll modinv(ll a) {
  ll b=mod,u=1,v=0,t;
  while(b){
    t=a/b;
    a-=t*b; swap(a,b);
    u-=t*v; swap(u,v);
  }
  return (u+mod)%mod;
}

ll moddevide(ll a,ll b){return (a*modinv(b))%mod;}

vec modncrlistp,modncrlistm;

ll modncr(ll n,ll r){
  ll i,size=modncrlistp.size();
  if(size<=n){
    modncrlistp.resize(n+1);
    modncrlistm.resize(n+1);
    if(!size){
      modncrlistp[0]=modncrlistm[0]=1;
      size++;
    }
    For(i,size,n+1){
      modncrlistp[i]=modncrlistp[i-1]*i%mod;
      modncrlistm[i]=modinv(modncrlistp[i]);
    }
  }
  return modncrlistp[n]*modncrlistm[r]%mod*modncrlistm[n-r]%mod;
}

ll modpow(ll a,ll n){
  ll res=1;
  while(n){
    if(n&1)res=res*a%mod;
    a=a*a%mod;
    n>>=1;
  }
  return res;
}

ll gcd(ll a,ll b){if(!b)return a;return (a%b==0)?b:gcd(b,a%b);}
ll lcm(ll a,ll b){return a/gcd(a,b)*b;}

ll countdigits(ll n){
  ll ans=0;
  while(n){n/=10;ans++;}
  return ans;
}

ll sumdigits(ll n){
  ll ans=0;
  while(n){ans+=n%10;n/=10;}
  return ans;
}
int judge(ll a){
string s;
cout<<a<<endl;
fflush(stdin);
cin>>s;
if(s[0]=='V')return -1;
if(s[0]=='M')return 1;
return 0;
}
int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  ll mid,x;
  cin>>x;
  pvec rp(2),lp(2);
  rp=lp=datas(0,judge(0));
  if(rp.second<0)return 0;
  rp.first=x;
  while(rp.first-lp.first>1){
    mid=rp.first+lp.first>>1;
    x=judge(mid);
    if(x<0)return 0;
    if((x+rp.second+mid-rp.first)%2){
      rp=datas(mid,x);
    }else{
      lp=datas(mid,x);
    }
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:104:25: error: no match for 'operator=' (operand types are 'pvec' {aka 'std::vector<std::pair<long long int, long long int> >'} and 'datas' {aka 'std::pair<long long int, long long int>'})
  104 |   rp=lp=datas(0,judge(0));
      |                         ^
In file included from /usr/include/c++/14/vector:72,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53,
                 from a.cc:2:
/usr/include/c++/14/bits/vector.tcc:210:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  210 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/vector.tcc:211:42: note:   no known conversion for argument 1 from 'datas' {aka 'std::pair<long long int, long long int>'} to 'const std::vector<std::pair<long long int, long long int> >&'
  211 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/14/vector:66:
/usr/include/c++/14/bits/stl_vector.h:766:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  766 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:766:26: note:   no known conversion for argument 1 from 'datas' {aka 'std::pair<long long int, long long int>'} to 'std::vector<std::pair<long long int, long long int> >&&'
  766 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:788:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  788 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:788:46: note:   no known conversion for argument 1 from 'datas' {aka 'std::pair<long long int, long long int>'} to 'std::initializer_list<std::pair<long long int, long long int> >'
  788 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
a.cc:105:9: error: 'using pvec = class std::vector<std::pair<long long int, long long int> >' {aka 'class std::vector<std::pair<long long int, long long int> >'} has no member named 'second'
  105 |   if(rp.second<0)return 0;
      |         ^~~~~~
a.cc:106:6: error: 'using pvec = class std::vector<std::pair<long long int, long long int> >' {aka 'class std::vector<std::pair<long long int, long long int> >'} has no member named 'first'
  106 |   rp.first=x;
      |      ^~~~~
a.cc:107:12: error: 'using pvec = class std::vector<std::pair<long long int, long long int> >' {aka 'class std::vector<std::pair<long long int, long long int> >'} has no member named 'first'
  107 |   while(rp.first-lp.first>1){
      |            ^~~~~
a.cc:107:21: error: 'using pvec = class std::vector<std::pair<long long int, long long int> >' {aka 'class std::vector<std::pair<long long int, long long int> >'} has no member named 'first'
  107 |   while(rp.first-lp.first>1){
      |                     ^~~~~
a.cc:108:12: error: 'using pvec = class std::vector<std::pair<long long int, long long int> >' {aka 'class std::vector<std::pair<long long int, long long int> >'} has no member named 'first'
  108 |     mid=rp.first+lp.first>>1;
      |            ^~~~~
a.cc:108:21: error: 'using pvec = class std::vector<std::pair<long long int, long long int> >' {aka 'class std::vector<std::pair<long long int, long long int> >'} has no member named 'first'
  108 |     mid=rp.first+lp.first>>1;
      |                     ^~~~~
a.cc:111:14: error: 'using pvec = class std::vector<std::pair<long long int, long long int> >' {aka 'class std::vector<std::pair<long long int, long long int> >'} has no member named 'second'
  111 |     if((x+rp.second+mid-rp.first)%2){
      |              ^~~~~~
a.cc:111:28: error: 'using pvec = class std::vector<std::pair<long long int, long long int> >' {aka 'class std::vector<std::pair<long long int, long long int> >'} has no member named 'first'
  111 |     if((x+rp.second+mid-rp.first)%2){
      |                            ^~~~~
a.cc:112:21: error: no match for 'operator=' (operand types are 'pvec' {aka 'std::vector<std::pair<long long int, long long int> >'} and 'datas' {aka 'std::pair<long long int, long long int>'})
  112 |       rp=datas(mid,x);
      |                     ^
/usr/include/c++/14/bits/vector.tcc:210:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  210 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/vector.tcc:211:42: note:   no known conversion for argument 1 from 'datas' {aka 'std::pair<long long int, long long int>'} to 'const std::vector<std::pair<long long int, long long int> >&'
  211 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:766:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  766 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:766:26: note:   no known conversion for argument 1 from 'datas' {aka 'std::pair<long long int, long long int>'} to 'std::vector<std::pair<long long int, long long int> >&&'
  766 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:788:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  788 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:788:46: note:   no known conversion for argument 1 from 'datas' {aka 'std::pair<long long int, long long int>'} to 'std::initializer_list<std::pair<long long int, long long int> >'
  788 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
a.cc:114:21: error: no match for 'operator=' (operand types are 'pvec' {aka 'std::vector<std::pair<long long int, long long int> >'} and 'datas' {aka 'std::pair<long long int, long long int>'})
  114 |       lp=datas(mid,x);
      |                     ^
/usr/include/c++/14/bits/vector.tcc:210:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  210 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/vector.tcc:211:42: note:   no known conversion for argument 1 from 'datas' {aka 'std::pair<long long int, long long int>'} to 'const std::vector<std::pair<long long int, long long int> >&'
  211 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:766:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  766 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:766:26: note:   no known conversion for argument 1 from 'datas' {aka 'std::pair<long long int, long long int>'} to 'std::vector<std::pair<long long int, long long int> >&&'
  766 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:788:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = std::pair<long long int, long long int>; _Alloc = std::allocator<std::pair<long long int, long long int> >]'
  788 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:788:46: note:   no known conversion for argument 1 from 'datas' {aka 'std::pair<long long int, long long int>'} to 'std::initializer_list<std::pair<long long int, long long int> >'
  788 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~