/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

3 votes313 views2 answers
Access last element of set c++
C++
0 vote349 views1 answer
Argument to number C++
C++
16 votes318 views6 answers
Sort vector c++
C++
0 vote329 views1 answer
Visual studio code include path not working c++
C++
10 votes336 views2 answers
Double to string c++
C++
1 vote340 views3 answers
Type casting in cpp
C++
0 vote373 views1 answer
Split 2d array into chunks in c++
C++
2 votes298 views1 answer
Pointer dereference
C++
0 vote349 views1 answer
Lnk2001 unresolved external symbol __imp_PlaySoundA
C++
0 vote305 views1 answer
How to include a library in arduino
C++