C :

#include<stdio.h>
#include<string.h>
int main(void)
{
    int k1,k2,k3;
    while(scanf("%d%d%d",&k1,&k2,&k3)!=EOF)
    {
        int i,j,i1=0,i2=0,i3=0,i11=0,i22=0,i33=0,p[100005];
        char s[100005],s1[100005],s2[100005],s3[100005],s11[100005],s22[100005],s33[100005];
        scanf("%s",s);
        for(i=0;i<strlen(s);i++)
            if(s[i]>='a'&&s[i]<='i')
            {
                s1[i1++]=s[i];
                p[i]=1;
            }
            else if(s[i]>='j'&&s[i]<='r')
            {
                s2[i2++]=s[i];
                p[i]=2;
            }
            else if((s[i]>='s'&&s[i]<='z')||s[i]=='_')
            {
                s3[i3++]=s[i];
                p[i]=3;
            }
            if(i1!=0)
            k1=k1%i1;
            if(i2!=0)
            k2=k2%i2;
            if(i3!=0)
            k3=k3%i3;
            for(i=0;i<i1;i++)
                s11[i]=s1[(i-k1+i1)%i1];
            for(i=0;i<i2;i++)
                s22[i]=s2[(i-k2+i2)%i2];
            for(i=0;i<i3;i++)
                s33[i]=s3[(i-k3+i3)%i3];
            for(i=0;i<strlen(s);i++)
                if(p[i]==1) s[i]=s11[i11++];
            else if(p[i]==2) s[i]=s22[i22++];
            else if(p[i]==3) s[i]=s33[i33++];


            printf("%s\n",s);
    }
    return 0;
}

C++ :

//364K	32MS
#include<stdio.h>
#include<string.h>
#define M 107
char ans[3][M],ss[3][M],s[M];//ans存的是加密字符串，ss存的是加密后
int p[3];
void change(char s1[M],int l,int k,char s2[M])//转换后的位置
{
    for(int i=0;i<l;i++)
        s2[(i+k)%l]=s1[i];
}
int main()
{
    int k1,k2,k3;
    //freopen("in.txt","r",stdin);
    //freopen("out.txt","w",stdout);
    while(scanf("%d%d%d",&k1,&k2,&k3)!=EOF)
    {
        scanf("%s",s);
        int len=strlen(s),l1=0,l2=0,l3=0;
        for(int i=0;i<len;i++)
        {
            if(s[i]>='a'&&s[i]<='i'){p[i]=1;ans[1][l1++]=s[i];}
            else if(s[i]>='j'&&s[i]<='r'){p[i]=2;ans[2][l2++]=s[i];}
            else{p[i]=3;ans[3][l3++]=s[i];}
        }
        if(l1)k1%=l1;
        if(l2)k2%=l2;
        if(l3)k3%=l3;
        change(ans[1],l1,k1,ss[1]);
        change(ans[2],l2,k2,ss[2]);
        change(ans[3],l3,k3,ss[3]);
        l1=l2=l3=0;
        for(int i=0;i<len;i++)
            if(p[i]==1){printf("%c",ss[1][l1++]);}
            else if(p[i]==2){printf("%c",ss[2][l2++]);}
            else if(p[i]==3){printf("%c",ss[3][l3++]);}
        printf("\n");
    }
    return 0;
}