“CodeForces/412C”的版本间的差异

#include<cstdio>
#include<iostream>
#include<string>
#include<algorithm>
#include<cstring>
using namespace std;
#define dsi(n) int n;scanf("%d",&n)
#define si(n) scanf("%d",&n)
#define f(i,n) for(int i=1;i<=n;++i)
#define fi(n) f(i,n)
#define f0(i,n) for(int i=0;i!=n;++i)
#define fd(i,n) for(int i=n;i>=1;--i)
#define ci const int&
#define foreach(i,s) for(typeof(s.begin()) i=s.begin();i!=s.end();++i)
#define c(x) const x&
string ans,s;
int main()
{
    dsi(n);
    cin>>ans;
    fi(n-1)
    {
        cin>>s;
        for(int i=0;i!=s.size();++i)
        {
            if(ans[i]=='?'&&s[i]!='?')ans[i]=s[i];
            if(ans[i]!=s[i]&&s[i]!='?'&&ans[i]!='?')ans[i]='*';
        }
    }
    for(int i=0;i!=ans.size();++i)
    {
        if(ans[i]=='?')ans[i]='p';
        if(ans[i]=='*')ans[i]='?';
    }
    cout<<ans;
    return 0;
}