Language: C++

#include <bits/stdc++.h>
using namespace std;
#define FOR(i, a, b) for(int i = (int)a; i <= (int)b; i++)
#define DEC(i, a, b) for(int i = (int)a; i >= (int)b; i--)
typedef pair<int, int> pi;
typedef pair<int, pi> pii;
#define f first
#define s second
#define pb push_back

string a, b, c;
int ans = 1e5;

int gen(string a, string b, string c) {
	string ans = "";
	int ret = a.length();
	FOR(i, 0, 6005) ans += " ";
	FOR(i, 0, a.length()-1) {
		if (a[i] != '?') ans[i] = a[i];
	}
	FOR(i, 0, 6005) {
		bool can = true;
		FOR(j, 0, b.length()-1) {
			if (b[j] == '?') continue;
			if (ans[i+j] != ' ' and ans[i+j] != b[j]) can = false;
		}
		if (can) {
			FOR(j, 0, b.length()-1) {
				if (b[j] != '?') ans[i+j] = b[j];
			}
			ret = max(ret, i + b.length());
			break;
		}
	}
	FOR(i, 0, 6005) {
		bool can = true;
		FOR(j, 0, c.length()-1) {
			if (c[j] == '?') continue;
			if (ans[i+j] != ' ' and ans[i+j] != c[j]) can = false;
		}
		if (can) return max(ret, i + c.length());
	}
}

int main() {
	cin >> a >> b >> c;
	ans = a.length() + b.length() + c.length();
	ans = min(ans, gen(a, b, c));
	ans = min(ans, gen(a, c, b));
	ans = min(ans, gen(b, a, c));
	ans = min(ans, gen(b, c, a));
	ans = min(ans, gen(c, a, b));
	ans = min(ans, gen(c, b, a));
	cout << ans;
}


Compiler output:
a.cc: In function 'int gen(std::string, std::string, std::string)':
a.cc:31:34: error: no matching function for call to 'max(int&, std::__cxx11::basic_string<char>::size_type)'
   31 |                         ret = max(ret, i + b.length());
      |                               ~~~^~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:31:34: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'})
   31 |                         ret = max(ret, i + b.length());
      |                               ~~~^~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:31:34: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   31 |                         ret = max(ret, i + b.length());
      |                               ~~~^~~~~~~~~~~~~~~~~~~~~
a.cc:41:36: error: no matching function for call to 'max(int&, std::__cxx11::basic_string<char>::size_type)'
   41 |                 if (can) return max(ret, i + c.length());
      |                                 ~~~^~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:41:36: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'})
   41 |                 if (can) return max(ret, i + c.length());
      |                                 ~~~^~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:41:36: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   41 |                 if (can) return max(ret, i + c.length());
      |                                 ~~~^~~~~~~~~~~~~~~~~~~~~