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public static int divisibleSumPairs(int n, int k, List<Integer> ar) {
// Write your code here
int ways = 0;
for (int i = 0; i < ar.size(); i++) {
for (int j = i + 1; j < ar.size(); j++) {
if ((ar.get(i) + ar.get(j)) % k == 0) {
ways++;
}
}
}
return ways;
}
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Divisible Sum Pairs
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java(8)