#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n;//输入重量 cout<<12+(n-1)*2;//直接计算首重12+(包裹重量n-1)*续重2 return 0; }
#include<bits/stdc++.h> using namespace std; int main(){
int n; cin>>n; cout<<12+(n-1)*2; return 0; }
输入n; -首重*2元 #include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; cout<<12+(n-1)*2; return 0; }
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