题目描述计算1~N之间所有奇数之和输入正整数N输出1~N之间所有奇数之和cppcpp

#include <iostream>
using namespace std;

int main() {
    int N;
    cin >> N;
    
    int sum = 0;
    for (int i = 1; i <= N; i += 2) {
        sum += i;
    }
    
    cout << sum << endl;
    
    return 0;
}