sandbox
12345678910111213141516
#include <iostream>
#include <map>
using namespace std;
int main() {
map <int, int> arr;
int v[] = {10, 5, 3, 4, 3, 5, 6};
for(int i=0; i<7;i++) {
if(arr.find(v[i]) == arr.end())
arr.insert({v[i], i});
else
cout << "Index is" << i << endl;
}
cout << "Hello World!";
return 0;
}
Cpp
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