#include<bits/stdc++.h>
#define fast_cin() ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
using namespace std;
// long long int n,m,k,flag=0,sz=0,v[51][51],dx[]={0,0,0,1},da[]={1,0,0,0};
// string s[51];
// vector<pair<long long int,pair<long long int,long long int>>>vv;
// void dfschng(long long int x,long long int y)
// {
// if(x<0 || y<0 || x>=n || y>=m)
// {
// return;
// }
// if(v[x][y] || s[x][y]=='*')
// {
// return;
// }
// //cout<<x<<" "<<y<<"\n";
// v[x][y]=1;s[x][y]='*';
// for(long long int i=0;i<4;i++)
// {
// long long int xx=x+dx[i],yy=y+da[i];
// dfschng(xx,yy);
// }
// }
// void dfs(long long int x,long long int y)
// {
// if(x<0 || y<0 || x>=n || y>=m)
// {
// return;
// }
// if(v[x][y] || s[x][y]=='*')
// {
// return;
// }
// v[x][y]=1;sz++;
// if(x==0 || y==0 || x==(n0) || y==(m0))
// {
// flag=1;
// }
// for(long long int i=0;i<4;i++)
// {
// long long int xx=x+dx[i],yy=y+da[i];
// dfs(xx,yy);
// }
// }
// long long int n;
// cin>>n;
// for(long long int i=1;i<=n;i+=2)
// {
// cout<<i<<" ";
// }
// for(long long int i=n-(n&1);i>=1;i-=2)
// {
// cout<<i<<" ";
// }
// cout<<"\n";
void solve()
{
long long int n;
cin>>n;
string s,op="Monocarp";
cin>>s;
double a=0.0,b=0.0;
for(long long int i=0;i<n;i++)
{
if(s[i]!='?')
{
a+=(i<n/2)*((double)(s[i]-'0'));
b+=(i>=n/2)*((double)(s[i]-'0'));
}
else
{
a+=(i<n/2)*((double)4.5);
b+=(i>=n/2)*((double)4.5);
}
}
if(fabsl(a-b)<1e-9)
{
op="Bicarp";
}
cout<<op<<"\n";
}
int main()
{
fast_cin();
long long int t;
//cin>>t;
t=1;
while(t--)
{
solve();
}
return 0;
}
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