#include <iostream> #include <cmath> using namespace std; int main() { int m; cin >> m; int mid; mid = pow(m,3)/m;//求m的3次方 int begin = mid-m+1; string str; for(int i=0 ; i<m ; i++){ str += (to_string(begin + 2*i) + "+"); } str.pop_back();//删除最后一个字符串 cout << str; ...