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#include <iostream>
using namespace std;
int ack(int x,int y)
{if (x==0){return y + 1;}else if (x > 0 && y == 0){return ack(x - 1, 1);}else if (x > 0 && y > …
pre { white-space: pre !important; word-wrap: normal !important; overflow-x: auto !important; display: block !important; font-family: "Consolas", "Monaco", "Courier New", …