#include <iostream>
using namespace std;
int n,m;
int cnt;
int num[25];
void fun(int last,int total) {
for(int i=last; i<n; i++) {
if(total+num[i]==m) cnt++;
fun(i+1,total+num[i]);
}
}
int main() {
ios::sync_with_stdio(0);
cin.tie(0);
fun(0,0);
return 0;
}
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