We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
importjava.io.*;importjava.util.*;publicclassSolution{privatestaticList<Long>sums=newArrayList<>();// Merge two numbers, "append their digits"privatestaticlongmerge(longa,longb){longshift=10;while(shift<=b)shift*=10;returna*shift+b;}// Check if a number is primeprivatestaticbooleanisPrime(longp){if(p<2)returnfalse;if(p<4)returntrue;if(p%2==0||p%3==0)returnfalse;for(longi=5;i*i<=p;i+=6){if(p%i==0||p%(i+2)==0)returnfalse;}returntrue;}// Check if two numbers can be merged in any way and the result is still primeprivatestaticbooleanmatch(longa,longb){returnisPrime(merge(a,b))&&isPrime(merge(b,a));}// Find all sets of primes with the specified sizeprivatestaticvoidfindSets(intsize,List<Integer>primes){intmaxPrime=Collections.max(primes);for(inti=0;i<primes.size();i++){intsmallPrime=primes.get(i);if(smallPrime==5)continue;List<Integer>candidates=newArrayList<>();for(intj=i+1;j<primes.size();j++){intlargePrime=primes.get(j);if(match(smallPrime,largePrime)){candidates.add(largePrime);}}if(size==3){checkTriple(smallPrime,candidates);}elseif(size==4){checkQuadruple(smallPrime,candidates);}elseif(size==5){checkQuintuple(smallPrime,candidates);}}}// Find and add sums for tripletsprivatestaticvoidcheckTriple(intfirst,List<Integer>candidates){for(inti=0;i<candidates.size();i++){for(intj=i+1;j<candidates.size();j++){if(match(candidates.get(i),candidates.get(j))){sums.add((long)first+candidates.get(i)+candidates.get(j));}}}}// Find and add sums for quadrupletsprivatestaticvoidcheckQuadruple(intfirst,List<Integer>candidates){for(inti=0;i<candidates.size();i++){for(intj=i+1;j<candidates.size();j++){if(!match(candidates.get(i),candidates.get(j))){continue;}for(intk=j+1;k<candidates.size();k++){if(match(candidates.get(i),candidates.get(k))&&match(candidates.get(j),candidates.get(k))){sums.add((long)first+candidates.get(i)+candidates.get(j)+candidates.get(k));}}}}}// Find and add sums for quintupletsprivatestaticvoidcheckQuintuple(intfirst,List<Integer>candidates){for(inti=0;i<candidates.size();i++){for(intj=i+1;j<candidates.size();j++){if(!match(candidates.get(i),candidates.get(j))){continue;}for(intk=j+1;k<candidates.size();k++){if(!match(candidates.get(i),candidates.get(k))||!match(candidates.get(j),candidates.get(k))){continue;}for(intl=k+1;l<candidates.size();l++){if(match(candidates.get(i),candidates.get(l))&&match(candidates.get(j),candidates.get(l))&&match(candidates.get(k),candidates.get(l))){sums.add((long)first+candidates.get(i)+candidates.get(j)+candidates.get(k)+candidates.get(l));}}}}}}publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);intmaxPrime=scanner.nextInt();intsize=scanner.nextInt();scanner.close();List<Integer>primes=newArrayList<>();primes.add(2);// Add 2 since it's not generated// Find all primes up to the specified maxPrimefor(inti=3;i<maxPrime;i+=2){booleanisPrime=true;for(intp:primes){if(p*p>i){break;}if(i%p==0){isPrime=false;break;}}if(isPrime){primes.add(i);}}findSets(size,primes);// Sort and print the sumsCollections.sort(sums);for(longsum:sums){System.out.println(sum);}}}
Cookie support is required to access HackerRank
Seems like cookies are disabled on this browser, please enable them to open this website
An unexpected error occurred. Please try reloading the page. If problem persists, please contact support@hackerrank.com
Project Euler #60: Prime pair sets
You are viewing a single comment's thread. Return to all comments →
JAva code
4, 9, 14 cash are not work