#include<iostream> #include<algorithm> using namespace std; int main(){ int len, current; while(cin>>len){ int dp[l...

复杂度到了n^4，懒得优化了。 #include<iostream> #include<algorithm> using namespace std; int len; int A[501][501]; int main(){ int len...

#include<iostream> #include<algorithm> #include<string.h> using namespace std; int flag[10][10]; int N, M, total, res; int ...

如题

#include<iostream> #include<algorithm> using namespace std; int main(){ int n; while(cin>>n){ int cnt2 = 0, cnt5 = ...