📅  最后修改于: 2022-03-11 14:57:16.849000             🧑  作者: Mango
ok is a map,int>;
d and k are random variables that needed to be made into a pair and put into map.
if(ok.find({d,k})==ok.end())
ok.insert({{d,k},1});
else
ok[{d,k}]++;
cout<