Pizzeria

input/code.cpp: In lambda function:
input/code.cpp:12:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(p2_.size()<=k)p2_.push_back(p2_[p2_.size()-1]*2%M);
                     ^

#include <stdint.h>
#include <iostream>
#include <vector>

const uint64_t M = 1000 * 1000 * 1000 + 7;

int main(){
  std::ios_base::sync_with_stdio(false);
  int n;std::cin>>n;
  std::vector<uint64_t>p2_{1};
  auto p2=[&](int k)->uint64_t{
    while(p2_.size()<=k)p2_.push_back(p2_[p2_.size()-1]*2%M);
    return p2_[k];
  };
  uint64_t result=0;
  for(uint64_t x=0;std::cin>>x;){
    result+=p2(n-1)*x;
    result%=M;
  }
  std::cout<<result<<'\n';
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 1

Verdict: ACCEPTED

Test 3

Group: 1

Verdict: ACCEPTED

Test 4

Group: 1

Verdict: ACCEPTED

Test 5

Group: 1

Verdict: ACCEPTED

Test 6

Group: 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 2

Verdict: ACCEPTED

Test 11

Group: 3

Verdict: ACCEPTED

Test 12

Group: 3

Verdict: ACCEPTED

Test 13

Group: 3

Verdict: ACCEPTED

Test 14

Group: 3

Verdict: ACCEPTED

Test 15

Group: 3

Verdict: ACCEPTED