#include
using namespace std;
int main() {
int n,b;
cin>>n;
int a[n],sum=0;
for(int i=0;i<n;i++)
{
cin>>a[i];
}
for(int i=0;i<n;i++)
{
sum+=(i%4+1)*a[i];
}
cout<<sum<0;
}
Create a one-dimensional array of n-bit positive integers and calculate its value as follows: The first digit of the array is multiplied by 1, the second digit by 2, the third digit by 3, the fourth digit by 4, the fifth digit by 1, the sixth digit by 2, the seventh digit by 3, the eighth digit by 4, and so on, and so on.
Input Description
Contains two lines. The first line contains a positive integer n, and the second line contains n integers, separated by Spaces.
Output description
Includes a line, an integer, indicating the value of the array
Example 1
Input
10
1 2 3 4 5 6 7 8 9 9 10
Output
129
Prompt
For 100% of the data, where n< = 100, 1 & lt; = per number < Is equal to 100.
#include <iostream>
using namespace std;
int main() {
int n,b;
cin>>n;
int a[n];
for(int i=0;i<n;i++)
{
cin>>a[i];
}
for(int i=;i;i++)
{
}
return 0;
}
?
0 Answer
#include
using namespace std;
int main() {
int n,b;
cin>>n;
int a[n],sum=0;
for(int i=0;i<n;i++)
{
cin>>a[i];
}
for(int i=0;i<n;i++)
{
sum+=(i%4+1)*a[i];
}
cout<<sum<0;
}
This answer quotes ChatGPT
#include > a[i];
}
int sum = 0;
for(int i=0; iif((i+1)%4 == 1 || (i+1)%4 == 2) {
sum += a[i] * (i%4 + 1);
} else {
sum += a[i];
}
}
cout << sum << endl;
return 0;
}
First input the length of the array n and n integers, and then calculate the value of the array according to the requirements of the question, that is, multiply each element with the corresponding coefficient according to the law, and then add up to get the value of the array. The rule is: the first digit of the array is multiplied by 1, the second digit by 2, the third digit by 3, the fourth digit by 4, the fifth digit by 1, the sixth digit by 2, the seventh digit by 3, the eighth digit by 4, and so on.
Thecode uses a for loop, which first creates an array a based on the length of the array, and then reads n integers to store in the array A. Then in the second for loop, the value of the array is calculated according to the rule, and the corresponding coefficient is determined according to the index of the element in the array. Finally output the value of the array.
, for example, for the sample input, the array has a value of 1 * 1 + 2 * 2 + 3 * 3 + 4 * 4 + 5 * 2 + 1 + 6 7 * 3 + 8 * 4 + 9 * 1 + 10 * 2 = 129, so the output 129.
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