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52 lines (45 loc) · 989 Bytes
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tempCodeRunnerFile.cpp
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52 lines (45 loc) · 989 Bytes
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int iterations;
for(int o=0;o<iterations;o++)
{
int number,number1,i,j,min=0,max=0,count=0;
scanf("%d",&number1);
scanf("%d",&number);
// scanf("%d",&number1);
int primes[number+1];
//populating array with naturals numbers
for(i = 2; i<=number; i++)
primes[i] = i;
i = 2;
while ((i*i) <= number)
{
if (primes[i] != 0)
{
for(j=2; j<number; j++)
{
if (primes[i]*j > number)
break;
else
// Instead of deleteing , making elemnets 0
primes[primes[i]*j]=0;
}
}
i++;
}
for(int m=number1;m<=number;m++)
{
if(primes[m]!=0)
{
count++;
if(min==0)
min=primes[m];
if(m>max)
max=primes[m];
}
}
if(count==0)
printf("%d",-1);
if(count>0)
{
printf("%d\n",max-min);
}
}