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Create Queue with minimum #2

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Create Queue with minimum #2

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33 changes: 33 additions & 0 deletions Queue with minimum
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Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
class queueWithMinimum{
private:
vector<pair<int, int> > s[2];
static const int inf = 1e9 + 7;

private:
int getMin(int k){
return s[k].size() == 0 ? inf : s[k].back().second;
}

void push(int x, int k){
s[k].push_back({x, min(getMin(k), x)});
}

public:
void push(int x){
push(x, 0);
}

int getMin(){
return min(getMin(0), getMin(1));
}

void pop(){
if (s[1].size() == 0){
while (s[0].size() > 0){
push(s[0].back().first, 1);
s[0].pop_back();
}
}
s[1].pop_back();
}
};