传奇私服行会名字 POJ 1163 求数字三角形由顶到底边的最大数字和动态规划 - 奇迹园 - 博客频道

//========================================================================
//TITLE:
// WinCE虚拟串口驱动(二)
//AUTHOR:
// norains
//DATE:
// Saturday 28-March-2009
//Environment:
// WINDOWS CE 5.0
//========================================================================

虚拟串口驱动的完整代码如下：

// VirtualSerial.cpp : Defines the entry point for the DLL application.//#include "windows.h"#include "reg.h"#include <vector>#include <Pegdser.h>#include "algorithm"//--------------------------------------------------------------------------//Macro#define REG_ROOT_KEY HKEY_LOCAL_MACHINE#define REG_DEVICE_SUB_KEY TEXT("Drivers//Builtin//VirtualSerial")#define REG_MAP_PORT_NAME TEXT("Map_Port")//The buffer length for storing the read data.#define READ_BUFFER_LENGTH MAX_PATH//--------------------------------------------------------------------------//Gloabal variableHANDLE g_hCom = INVALID_HANDLE_VALUE;unsigned int g_uiOpenCount = 0;CRITICAL_SECTION g_csOpen;CRITICAL_SECTION g_csRead;CRITICAL_SECTION g_csWrite;std::vector<BYTE> g_vtBufRead(READ_BUFFER_LENGTH,0);DWORD g_dwLenReadBuf = 0;DWORD g_dwEvtMask = 0;DWORD g_dwWaitMask = 0;HANDLE g_hEventComm = NULL;BOOL g_bMonitorProcRunning = FALSE;BOOL g_bExitMonitorProc = FALSE;BOOL g_bReaded = FALSE;//--------------------------------------------------------------------------BOOL WINAPI DllEntry(HANDLE hInstDll, DWORD dwReason, LPVOID lpvReserved){ switch ( dwReason ) { case DLL_PROCESS_ATTACH: break; } return TRUE;}DWORD MonitorCommEventProc(LPVOID pParam){ InterlockedExchange(reinterpret_cast<LONG *>(&g_bMonitorProcRunning),TRUE); RETAILMSG(TRUE,(TEXT("[VSP]:MonitorCommEventProc Running!/r/n"))); std::vector<BYTE> vtBufRead(g_vtBufRead.size(),0); while(TRUE) { DWORD dwEvtMask = 0; BOOL bWaitRes = WaitCommEvent(g_hCom,&dwEvtMask,NULL); if(g_bExitMonitorProc ,<a href="http://WWW.CSLENS.COM/">韩版传奇私服</a>!= FALSE) { break; } if(bWaitRes == FALSE) { continue; } DWORD dwRead = 0; if(dwEvtMask & EV_RXCHAR) { EnterCriticalSection(&g_csRead); ReadFile(g_hCom,&g_vtBufRead[0],vtBufRead.size(),&dwRead,NULL); if(dwRead == vtBufRead.size() g_bReaded != FALSE) { g_dwLenReadBuf = dwRead; g_vtBufRead.swap(vtBufRead); } else if(dwRead != 0) { if(g_dwLenReadBuf + dwRead <= g_vtBufRead.size()) { g_dwLenReadBuf += dwRead; g_vtBufRead.insert(g_vtBufRead.end(),vtBufRead.begin(),vtBufRead.begin() + dwRead); } else { DWORD dwCover = g_dwLenReadBuf + dwRead - g_vtBufRead.size(); std::copy(g_vtBufRead.begin() + dwCover,g_vtBufRead.begin() + g_dwLenReadBuf,g_vtBufRead.begin()); std::copy(vtBufRead.begin(),vtBufRead.begin() + dwRead,g_vtBufRead.begin() + (g_dwLenReadBuf - dwCover)); g_dwLenReadBuf = g_vtBufRead.size(); } } g_bReaded = FALSE; DEBUGMSG(TRUE,(TEXT("[VSP]:Read data : %d/r/n"),dwRead)); LeaveCriticalSection(&g_csRead); } if(dwEvtMask == EV_RXCHAR && ((g_dwWaitMask & EV_RXCHAR) == 0 dwRead == 0)) { //The return event mask is only EV_RXCHAR and there is not EV_RXCHAR in the wait mask. continue; } InterlockedExchange(reinterpret_cast<LONG *>(&g_dwEvtMask),dwEvtMask); PulseEvent(g_hEventComm); //Sleep for other thread to respond to the event Sleep(100); DEBUGMSG(TRUE,(TEXT("[VSP]:PulseEvent! The event-mask is 0x%x/r/n"),dwEvtMask)); } RETAILMSG(TRUE,(TEXT("[VSP]:Exit the MonitorCommEventProc/r/n"))); InterlockedExchange(reinterpret_cast<LONG *>(&g_bMonitorProcRunning),FALSE); return 0;}BOOL VSP_Close(DWORD dwHandle){ EnterCriticalSection(&g_csOpen); g_uiOpenCount --; if(g_uiOpenCount == 0) { //Notify the monitor thread to exit. InterlockedExchange(reinterpret_cast<LONG *>(&g_bExitMonitorProc),TRUE); DWORD dwMask = 0; GetCommMask(g_hCom,&dwMask); SetCommMask(g_hCom,dwMask); while(InterlockedExchange(reinterpret_cast<LONG *>(&g_bMonitorProcRunning),<a href="http://WWW.DCYSQ.COM/">传奇世界sf</a>,TRUE) == TRUE) { Sleep(20); } InterlockedExchange(reinterpret_cast<LONG *>(&g_bMonitorProcRunning),FALSE); CloseHandle(g_hCom); g_hCom = NULL; } LeaveCriticalSection(&g_csOpen); return TRUE;}DWORD VSP_Init(DWORD dwContext){ RETAILMSG(TRUE,(TEXT("[+VSP_Init]/r/n"))); InitializeCriticalSection(&g_csOpen); InitializeCriticalSection(&g_csRead); InitializeCriticalSection(&g_csWrite); g_hEventComm = CreateEvent(NULL,TRUE,FALSE,NULL); RETAILMSG(TRUE,(TEXT("[-VSP_Init]/r/n"))); return TRUE;}BOOL VSP_Deinit( DWORD dwContext // future: pointer to the per disk structure ){ RETAILMSG(TRUE,(TEXT("[+VSP_Deinit]/r/n"))); CloseHandle(g_hEventComm); g_hEventComm = NULL; DeleteCriticalSection(&g_csOpen); DeleteCriticalSection(&g_csRead); DeleteCriticalSection(&g_csWrite); RETAILMSG(TRUE,(TEXT("[-VSP_Deinit]/r/n"))); return TRUE;}DWORD VSP_Open( DWORD dwData, DWORD dwAccess, DWORD dwShareMode ){ BOOL bResult = FALSE; EnterCriticalSection(&g_csOpen); //The variable CReg reg; std::vector<TCHAR> vtBuf(MAX_PATH,0); COMMPROP commProp = {0}; if(g_uiOpenCount != 0) { goto SET_SUCCEED_FLAG; } if(reg.Open(REG_ROOT_KEY,REG_DEVICE_SUB_KEY) == FALSE) { RETAILMSG(TRUE,(TEXT("[VSP]:Failed to open the registry/r/n"))); goto LEAVE_CRITICAL_SECTION; } //Get the MAP_PORT name reg.GetValueSZ(REG_MAP_PORT_NAME,&vtBuf[0],vtBuf.size()); g_hCom = CreateFile(&vtBuf[0],GENERIC_READ GENERIC_WRITE ,0,NULL,OPEN_EXISTING,0,NULL); if(g_hCom == INVALID_HANDLE_VALUE ) { RETAILMSG(TRUE,(TEXT("[VSP]Failed to map to %s/r/n"),&vtBuf[0])); goto LEAVE_CRITICAL_SECTION; } else { RETAILMSG(TRUE,(TEXT("[VSP]Succeed to map to %s/r/n"),&vtBuf[0])); } InterlockedExchange(reinterpret_cast<LONG *>(&g_bExitMonitorProc),FALSE); CloseHandle(CreateThread(NULL,NULL,MonitorCommEventProc,NULL,NULL,NULL)); SET_SUCCEED_FLAG: g_uiOpenCount ++; bResult = TRUE; LEAVE_CRITICAL_SECTION: LeaveCriticalSection(&g_csOpen); return bResult;}BOOL VSP_IOControl( DWORD dwHandle, DWORD dwIoControlCode, PBYTE pBufIn, DWORD dwBufInSize, PBYTE pBufOut, DWORD dwBufOutSize, PDWORD pBytesReturned ){ switch(dwIoControlCode) { case IOCTL_SERIAL_SET_DCB: { return SetCommState(g_hCom,reinterpret_cast<DCB *>(pBufIn)); } case IOCTL_SERIAL_GET_DCB: { return GetCommState(g_hCom,reinterpret_cast<DCB *>(pBufOut)); } case IOCTL_SERIAL_WAIT_ON_MASK: { if(dwBufOutSize < sizeof(DWORD) WaitForSingleObject(g_hEventComm,<a href="http://WWW.0379FQ.COM/">传奇私服行会名字</a>,INFINITE) == WAIT_TIMEOUT) { *pBytesReturned = 0; return FALSE; } else { InterlockedExchange(reinterpret_cast<LONG *>(pBufOut),g_dwEvtMask); *pBytesReturned = sizeof(DWORD); return TRUE; } } case IOCTL_SERIAL_SET_WAIT_MASK: { g_dwWaitMask = *reinterpret_cast<DWORD *>(pBufIn); return SetCommMask(g_hCom,g_dwWaitMask EV_RXCHAR); //The driver need the EV_RXCHAR notify event. } case IOCTL_SERIAL_GET_WAIT_MASK: { if(dwBufOutSize < sizeof(DWORD) GetCommMask(g_hCom,reinterpret_cast<DWORD *>(pBufOut)) == FALSE) { *pBytesReturned = 0; return FALSE; } else { *pBytesReturned = sizeof(DWORD); return TRUE; } } } return FALSE;}DWORD VSP_Read(DWORD dwHandle,<a href="http://WWW.health1688.com/">传奇世界私服</a>, LPVOID pBuffer, DWORD dwNumBytes){ EnterCriticalSection(&g_csRead); //The g_dwLenReadBuf must be less than or equal to g_vtBufRead.size(), so needn't compare with each other. DWORD dwCopy = g_dwLenReadBuf > dwNumBytes ? dwNumBytes : g_dwLenReadBuf; if(dwCopy != 0) { memcpy(pBuffer,&g_vtBufRead[0],dwCopy); } DEBUGMSG(TRUE,(TEXT("[VSP]:Copy cout:%d/r/n"),dwCopy)); g_bReaded = TRUE; LeaveCriticalSection(&g_csRead); //Sleep for other thread to entry the function. Sleep(10); return dwCopy;}DWORD VSP_Write(DWORD dwHandle, LPCVOID pBuffer, DWORD dwNumBytes){ EnterCriticalSection(&g_csWrite); DWORD dwWrite = 0; WriteFile(g_hCom,pBuffer,dwNumBytes,&dwWrite,NULL); LeaveCriticalSection(&g_csWrite); return dwWrite;}DWORD VSP_Seek(DWORD dwHandle, long lDistance, DWORD dwMoveMethod){ return FALSE;}void VSP_PowerUp(void){ return;}void VSP_PowerDown(void){ return;}

一般的思考方法是，由特殊情况比如题目给的示例数据入手，分析如何计算辅助数组dp的值，dp[i][j]记录以r[i][j]为顶点向下走到底边可以得到的最大和，dp数组底边的值就是数字三角形底边数字，然后从底向上计算，dp数组的计算方程（即动态规划状态方程）为

dp[i][j] = max(r[i][j] + dp[i+1][j] , r[i][j] + dp[i+1][j+1])

不过该驱动代码是作者量身定做的，像IOControl就简单地实现了几个，其余的因为在实际使用中本人没用到，所以都没实现，只是简单地返回了FALSE。如果有朋友对此有兴趣，并且实际中也使用到，可以自行调用原生函数实现。

最后，是能让驱动正常挂载的注册表设置：

[HKEY_LOCAL_MACHINE/Drivers/Builtin/VirtualSerial]
"Prefix"="VSP"
"Dll"="VirtualSerial.dll"
"Order"=dword:0
"Index"=dword:1
"Map_Port"="COM1:"

Problem:		User:
Memory: 324K		Time: 16MS
Language: C++		Result: Accepted

//16:09#include <iostream>using namespace std;int max(int a,int b){return a>b?a:b;}int main(){int dp[101][101],r[101][101];int n,i,j;cin>>n;for(i = 0; i < n; i++){for(j = 0; j < i+1; j++){cin>>r[i][j];}}memset(dp,0,sizeof(dp));for(i = 0; i < n; i++){dp[n-1][i] = r[n-1][i];}for(i = n-2; i >= 0; i--){for(j = 0; j < i+1; j++){//dp[i][j] = max(r[i][j] + dp[i+1][j] , r[i][j] + dp[i+1][j+1]);//可以进一步化简dp[i][j] = r[i][j] + max(dp[i+1][j] , dp[i+1][j+1]);}}cout<<dp[0][0]<<endl;return 0;}//16:18