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#include <map> void print_pairs(int array[], int length, int sum) { std::map<int, int> element; for (int i=0; i< length; ++i) { element.insert( std::pair<int, int>(array[i], 1)); if(element.count(sum - array[i]) ) printf("\n{%d, %d}", array[i], sum - array[i]); } } int main() { int a[] = {3, 4, 5, 1, 4, 2}; print_pairs(a, 6, 6); return 0; }
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