首页 > 代码库 > Instruction （hdu 5083）

Instruction （hdu 5083）

2024-07-29 07:42:27   219人阅读

Instruction

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 343    Accepted Submission(s): 99


Problem Description
Nowadays, Jim Green has produced a kind of computer called JG. In his computer, the instruction is represented by binary code. However when we code in this computer, we use some mnemonic symbols. For example, ADD R1, R2 means to add the number in register R1 and R2, then store the result to R1. But this instruction cannot be execute directly by computer, before this instruction is executed, it must be changed to binary code which can be executed by computer. Each instruction corresponds to a 16-bit binary code. The higher 6 bits indicates the operation code, the middle 5 bits indicates the destination operator, and the lower 5 bits indicates the source operator. You can see Form 1 for more details.
15 operation code(6 bits)109destination operator code(5 bits)54source operator code(5 bits)0Form 1


In JG system there are 6 instructions which are listed in Form 2.
instructionADD Ra,RbSUB Ra,RbDIV Ra,RbMUL Ra,RbMOVE Ra,RbSET RafunctionAdd the number in register Ra and Rb, then store the result to Ra.Subtract the number in register Ra to Rb, then store the result to Ra.Divide the number in register Ra by Rb, then store the result to Ra.Mulplicate the number in register Ra and Rb, then store the result to Ra.Move the number in register Rb to Ra.Set 0 to Ra.Form 2


Operation code is generated according to Form 3.
OperationADDSUBDIVMULMOVESETOperation code000001000010000011000100000101000110Form 3


Destination operator code and source operator code is the register code of the register which is related to.
There are 31 registers in total. Their names are R1,R2,R3…,R30,R31. The register code of Ri is the last 5 bits of the number of i in the binary system. For eaxample the register code of R1 is 00001, the register code of R2 is 00010, the register code of R7 is 00111, the register code of R10 is 01010, the register code of R31 is 11111.
So we can transfer an instruction into a 16-bit binary code easyly. For example, if we want to transfer the instruction ADD R1,R2, we know the operation is ADD whose operation code is 000001, destination operator code is 00001 which is the register code of R1, and source operator code is 00010 which is the register code of R2. So we joint them to get the 16-bit binary code which is 0000010000100010.
However for the instruction SET Ra, there is no source register, so we fill the lower 5 bits with five 0s. For example, the 16-bit binary code of SET R10 is 0001100101000000
You are expected to write a program to transfer an instruction into a 16-bit binary code or vice-versa.
 

Input
Multi test cases (about 50000), every case contains two lines.
First line contains a type sign, ‘0’ or ‘1’. 
‘1’ means you should transfer an instruction into a 16-bit binary code;
‘0’ means you should transfer a 16-bit binary code into an instruction.
For the second line.
If the type sign is ‘1’, an instruction will appear in the standard form which will be given in technical specification; 
Otherwise, a 16-bit binary code will appear instead.
Please process to the end of file.

[Technical Specification]
The standard form of instructions is 
ADD Ra,Rb
SUB Ra,Rb
DIV Ra,Rb
MUL Ra,Rb
MOVE Ra,Rb
SET Ra
which are also listed in the Form 2.
1≤a,b≤31
There is exactly one space after operation, and exactly one comma between Ra and Rb other than the instruction SET Ra. No other character will appear in the instruction.
 

Output
For type ‘0’，if the 16-bit binary code cannot be transferred into a instruction according to the description output “Error!” (without quote), otherwise transfer the 16-bit binary code into instruction and output the instruction in the standard form in a single line.
For type ‘1’, transfer the instruction into 16-bit binary code and output it in a single line.
 

Sample Input
1
ADD R1,R2
0
0000010000100010
0
1111111111111111
 

Sample Output
0000010000100010
ADD R1,R2
Error!
 

Source
BestCoder Round #15
 

Recommend
heyang   |   We have carefully selected several similar problems for you:  5085 5084 5081 5080 5079 
 
题意：将二进制编码转化成字符命令，或将字符命令转化成二进制，共有六种命令，每种命令对应一个二进制编码，见题目表格；然后操作数有31种，分别是R1~R31，对应分别二进制00000~11111；其中要注意SET命令只有一个操作数，它的二进制编码最后5位全部写为0，若SET操作输入的二进制编码后五位不全是0，则输出Error！；不满足要求的命令也输出Error！，另外操作数不能是00000.
蛋疼的一题，考虑不周，比赛没做出来。。。。代码比较乱啊啊啊啊啊
代码：
#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <string>
#include <map>
#include <stack>
#include <vector>
#include <set>
#include <queue>
#pragma comment (linker,"/STACK:102400000,102400000")
#define maxn 1005
#define MAXN 2005
#define mod 1000000009
#define INF 0x3f3f3f3f
#define pi acos(-1.0)
#define eps 1e-6
typedef long long ll;
using namespace std;

char ope[6][5]={{"ADD"},{"SUB"},{"DIV"},{"MUL"},{"MOVE"},{"SET"}};
char code[6][7]={{"000001"},{"000010"},{"000011"},{"000100"},{"000101"},{"000110"}};
char co[31][6]={ {"00001"} , {"00010"} , {"00011"} , {"00100"} , {"00101"} , {"00110"} , {"00111"} , {"01000"} , {"01001"} , {"01010"}
               , {"01011"} , {"01100"} , {"01101"} , {"01110"} , {"01111"} , {"10000"} , {"10001"} , {"10010"} , {"10011"} , {"10100"}
               , {"10101"} , {"10110"} , {"10111"} , {"11000"} , {"11001"} , {"11010"} , {"11011"} , {"11100"} , {"11101"} , {"11110"}
               , {"11111"}};
char s1[5],s2[10];

int OP(char str[])
{
    for (int i=0;i<6;i++)
    {
        if (strcmp(str,ope[i])==0)
            return i;
    }
}

int main()
{
    int n;
    while (~scanf("%d",&n))
    {
        if (n==1)
        {
            scanf("%s%s",s1,s2);
            int x=OP(s1);
            int dd=x;
            printf("%s",code[x]);
            x=s2[1]-'0';
            int ok=0;
            if (isdigit(s2[2]))
            {
                ok=1;
                x=x*10;
                x=x+s2[2]-'0';
            }
            x--;
            printf("%s",co[x]);
            if (dd==5)
            {
                printf("00000\n");
                continue;
            }
            if (ok)
            {
                x=s2[5]-'0';
                if (isdigit(s2[6]))
                {
                    x=x*10;
                    x=x+s2[6]-'0';
                }
            }
            else
            {
                x=s2[4]-'0';
                if (isdigit(s2[5]))
                {
                    x=x*10;
                    x=x+s2[5]-'0';
                }
            }
            x--;
            printf("%s\n",co[x]);
        }
        else if (n==0)
        {
            scanf("%s",s1);
            int len=strlen(s1);
            int t=1;
            int sum=0;
            for (int i=5;i>=0;i--)
            {
                int x=s1[i]-'0';
                sum+=t*x;
                t=t*2;
            }
            if (sum>6||sum==0)
            {
                printf("Error!\n");
                continue;
            }
            sum--;
            int o=sum;
            int flag=sum;
//            printf("%s",ope[sum]);
            t=1;
            sum=0;
            for (int i=10;i>=6;i--)
            {
                int x=s1[i]-'0';
                sum+=t*x;
                t=t*2;
            }
            if (sum>31||sum==0)
            {
                printf("Error!\n");
                continue;
            }
            int aa=sum;
//            printf(" R%d",sum);
            if (flag==5)
            {
                t=1;
                sum=0;
                for (int i=15;i>=11;i--)
                {
                    int x=s1[i]-'0';
    //                printf("x=%d\n",x);
                    sum+=t*x;
                    t=t*2;
                }
                if (sum==0)
                {
                    printf("%s",ope[o]);
                    printf(" R%d",aa);
                    printf("\n");
                    continue;
                }
                else
                {
                    printf("Error!\n");
                    continue;
                }
            }
            t=1;
            sum=0;
            for (int i=15;i>=11;i--)
            {
                int x=s1[i]-'0';
//                printf("x=%d\n",x);
                sum+=t*x;
                t=t*2;
            }
            if (sum>31||sum==0)
            {
                printf("Error!\n");
                continue;
            }
            printf("%s",ope[o]);
            printf(" R%d",aa);
            printf(",R%d\n",sum);
        }
    }
    return 0;
}



Instruction （hdu 5083）


联系
我们