/*
* // This is the custom function interface.
* // You should not implement it, or speculate about its implementation
* class CustomFunction {
* public:
* // Returns f(x, y) for any given positive integers x and y.
* // Note that f(x, y) is increasing with respect to both x and y.
* // i.e. f(x, y) < f(x + 1, y), f(x, y) < f(x, y + 1)
* int f(int x, int y);
* };
*/
class Solution {
public:
vector<vector<int>> findSolution(CustomFunction& customfunction, int z) {
vector<vector<int>> res;
for(int i=1;i<=1000;i++){
for(int j=1;j<=1000;j++){
if (customfunction.f(i,j)==z){
vector<int> temp{i,j};
res.push_back(temp);
break;
}
}
}
return res;
}
};