/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

2 votes162 views1 answer
Is javascript for websites only
C++
0 vote176 views1 answer
Flutter websocket auto reconnect
C++
3 votes163 views2 answers
Convert binary string to int c++
C++
0 vote172 views1 answer
Template member functions in cpp files
C++
0 vote188 views1 answer
Play audio c++
C++
1 vote168 views1 answer
Parallelize for loop c++
C++
0 vote197 views1 answer
Assert warning c++
C++
0 vote159 views1 answer
How to block the screen c++
C++
1 vote127 views1 answer
Arduino funktion
C++
0 vote163 views1 answer
Platform io change baud rate
C++