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  • hdu-1129(模拟题)

    题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1129

    注意:c_code[i]=(p_code[i*k%n]-i)%28;

    #include<iostream>
    #include<cstring>
    #include<cstdio>
    #include<map>
    using namespace std;
    char dc[50]={'_','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t',
    'u','v','w','x','y','z','.'};
    map <char,int> mp;
    char str[120];
    int pcode[120],ccode[120];
    int main(void)
    {
        mp['_']=0;mp['a']=1;mp['b']=2;mp['c']=3;mp['d']=4;mp['e']=5;mp['f']=6;mp['g']=7;mp['h']=8;mp['i']=9;
        mp['j']=10;mp['k']=11;mp['l']=12;mp['m']=13;mp['n']=14;mp['o']=15;mp['p']=16;mp['q']=17;mp['r']=18;
        mp['s']=19;mp['t']=20;mp['u']=21;mp['v']=22;mp['w']=23;mp['x']=24;mp['y']=25;mp['z']=26;mp['.']=27;
        int n,len,i,j,k;
        while(~scanf("%d",&k)&&k)
        {
            scanf("%s",str);
            len=strlen(str);
            for(i=0;i<len;i++)
            {
                ccode[i]=mp[str[i]];
                pcode[i*k%len]=(ccode[i]+i)%28;
            }
            for(i=0;i<len;i++) printf("%c",dc[pcode[i]]);
            printf("
    ");
        }
        return 0;
    }
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  • 原文地址:https://www.cnblogs.com/2018zxy/p/9903788.html
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