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P2415 集合求和

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R38780934
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Baoshuo Ren 2020-09-23 19:16:49 +08:00 committed by Baoshuo Ren
parent 900ad6a48a
commit f583f042cb
Signed by: baoshuo
GPG Key ID: 70F90A673FB1AB68
1 changed files with 17 additions and 0 deletions
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problem/P2415/P2415.cpp Normal file
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// R38780934
#include <bits/stdc++.h>
using namespace std;
int main() {
long long sum, a, i;
sum = a = i = 0;
while (cin >> a) {
sum += a;
i++;
}
sum *= 2 << i - 2;
cout << sum << endl;
return 0;
}