题解 | #牛牛学数列#
牛牛学数列
https://ac.nowcoder.com/acm/problem/22156
#include<bits/stdc++.h>//万能头文件 using namespace std;
int main() { int n,sum=0; cin >> n; for(int i=1;i<=n;i++){ if(i%2==0){ sum-=i; } else{ sum+=i; } } cout << sum; }
牛牛学数列
https://ac.nowcoder.com/acm/problem/22156
#include<bits/stdc++.h>//万能头文件 using namespace std;
int main() { int n,sum=0; cin >> n; for(int i=1;i<=n;i++){ if(i%2==0){ sum-=i; } else{ sum+=i; } } cout << sum; }
相关推荐