First time job

public class jiajian{
public static void Main (String args[]) {
int i,a=13,b=23,result=0;
for (i=1;i<=49;i++) {
Result=result+a-b;
a=a+20;
b=b+20;
}
SYSTEM.OUT.PRINTLN ("The result is:" +result);
}
}

public class jiecheng{
public static void Main (String args[]) {
int i,sum=1,total=0;
for (i=1;i<20;i++) {
Sum=sum*i;
Total=total+sum;
}
System.out.println ("and for:" +total);
}
}

public class shuixianhua{
public static void Main (String args[]) {
int i,a,b,c,d;
for (i=100;i<1000;i++) {
a=i/100;
b=i/10%10;
c=i%10;
if (a*a*a+b*b*b+c*c*c==i) {
System.out.println ("Narcissus number:" +i "\ t");
}
for (i=1000;i<10000;i++) {
a=i/1000;
b=i/100%10;
c=i/10%10;
d=i%10;
if (a*a*a+b*b*b+c*c*c+d*d*d==i) {
System.out.println (+i "\ t");
}
}
}
}

public class tiaojian{
public static void Main (string[] args) {
int i;
for (i=1;i<1000;i++) {
if (i%3==0&&i%5==0&&i%7==0)
System.out.println ("Can be divisible by 3 and 5 and 7 is:" +i);
}
}
}

First time job