摘要：#include<iostream> using namespace std; int main(){ freopen("in.txt","r",stdin); freopen("out.txt","w",stdout); string s; cin>>s; int a; int b[7]; for 阅读全文

摘要：#include<iostream> #include<vector> using namespace std; int a(int b){ if(b<=1){ return 1; } return b*a(b-1); } int main(){ int n,s=0; cin>>n; for(int 阅读全文

摘要：#include<iostream> #include<vector> using namespace std; int main(){ int n,sam=0; cin>>n; vector<int> a; a.push_back(1); for(int i=2;i<=n;i++){ for(in 阅读全文