/C++/What does map.count() return in c++

What does map.count() return in c++

int n; cin>>n;
long val;
map<int,long> mp3;
long long res=0;
while(n--){
	cin>>val;
	if(mp3.count(val)) 	res+=mp3[val]; 
    //mp3.count(val) returns 1 if val is present in the map already or 
    //the number of times the key K is present in the map container.
    if(mp2.count(val)) 	mp3[val*r]+=mp2[val];
	mp2[val*r]++;
}
cout<<res<<endl;

Similar codes

1 vote224 views1 answer
C++ copy file to another directory
C++
0 vote209 views1 answer
C++ scanf always expects double and not float
C++
0 vote169 views1 answer
Prefix array algorithm in c++
C++
0 vote246 views1 answer
Time and date (tm structure ) in C++
C++
0 vote248 views1 answer
How to display score using SDL in c++
C++
1 vote224 views1 answer
Doubly linked list c++ code
C++
1 vote267 views1 answer
What does the modularity mean in c++
C++
7 votes216 views5 answers
Set precision in c++
C++
0 vote288 views1 answer
C++ with SVD
C++
0 vote226 views1 answer
How to slice vector in c++
C++