#include <iostream>
using namespace std;
int sum(int a, int b) {
return a + b;
}
double sum(double a, double b) {
return a + b;
}
double sum(int a, double b) {
return a + b;
}
double sum(double a, int b) {
return a + b;
}
int main() {
cout << sum(2, 3.1);
return 0;
}
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