#include <iostream>

 #include <Windows.h>

 using namespace std;

 HANDLE hMutex;

 int counts = ;

 int flag = ;

 void t1();

 void t2();

 void t3();

 int main() {

     HANDLE hThread = CreateThread(NULL, , (LPTHREAD_START_ROUTINE)t1, NULL, , NULL);

     hThread = CreateThread(NULL, , (LPTHREAD_START_ROUTINE)t2, NULL, , NULL);

     hThread = CreateThread(NULL, , (LPTHREAD_START_ROUTINE)t3, NULL, , NULL);

     hMutex = CreateMutex(NULL, FALSE, L"lvhuan");

     CloseHandle(hThread);

     while(counts<){

         Sleep();

     }

     return ;

 }

 void t1() {

     while (counts < ) {

         WaitForSingleObject(hMutex, INFINITE);

         if (flag == ) {

             flag = ;

             cout << 'A' << endl;

             counts++;

         }

         ReleaseMutex(hMutex);

     }

 }

 void t2() {

     while (counts < ) {

         WaitForSingleObject(hMutex, INFINITE);

         if (flag == ) {

             flag = ;

             cout << 'B' << endl;

             counts++;

         }

         ReleaseMutex(hMutex);

     }

 }

 void t3() {

     while (counts < ) {

         WaitForSingleObject(hMutex, INFINITE);

         if (flag == ) {

             flag = ;

             cout << 'C' << endl;

             counts++;

         }

         ReleaseMutex(hMutex);

     }

 }