By TheInvadr, history, 5 months ago,

so for problem 1255B, im trying to connect every fridge to the ones costing the smallest and second smallest then if need be connecting those 2 to each other.its saying that the 503th fridge in the first testcase in the second test can be opened by anyone ? can anyone explain why ? this is my code -

# include <bits/stdc++.h>

using namespace std; int main() { int t; cin>>t; while(t--){ // int n,m; int n,m; cin>>n>>m;

pair<int,int> arr[n];
int a[n];

for(int i=0;i<n;i++){
cin>>arr[i].first;
arr[i].second=i;
}

if(n!=m||n==2){
cout<<-1<<endl;
continue;
}

sort(arr,arr+n);
vector<pair<int,int>> res;
int sum = 0;
int cntf = 0;
int cnts = 0;

for (int i = 2; i < n; i++) {

sum += arr[i].first + arr[0].first;
res.push_back({arr[i].second+1, arr[0].second + 1});
cntf++;

sum += arr[i].first + arr[1].first;
res.push_back({arr[i].second+1, arr[1].second + 1});
cnts++;

}

if(cntf<2||cnts<2){
sum+=arr[0].first+arr[1].first;
res.push_back({arr[0].second+1,arr[1].second+1});
}

cout<<sum<<endl;
for(pair<int,int> i : res)cout<<i.first<<" "<<i.second<<endl;

}

}

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