problem link:-https://codeforces.net/problemset/problem/1881/D here we have to choose two element in the array let ai,aj and choose a divisor of ai let x and replace ai=ai/x ans aj=aj*x; after some operation we have to make all the element equal in that array now let consider an array of two elements a1,a2 now let ai=a1 and aj=a2 x the divisor a1 ==>let say a1=a1/x and aj=aj*x; ==>now a1/x=a2*x now multiply these two we get (a1/x)*(aj*x)=a1*a2; we can generalise after all the operation when we multiply all the elements we get a1*a2*a3*a4...... so we can generalise if the nth root of a1*a2*a3....*an is a whole number then return yes otherwise return no; I don't no how to implement this idea..... also please clarify that the idea is right or wrong.