[CDOJ 1343] 卿学姐失恋了
http://acm.uestc.edu.cn/#/problem/show/1343
#include<cstdio>
int m,a[25],tmp[25];
int dfs(int u,int id)
{
while(a[u]==id&&u)u--;
if(!u)return 0;
return dfs(u-1,6-a[u]-id)+tmp[u-1];
}
int main()
{
scanf("%d
http://acm.uestc.edu.cn/#/problem/show/1343
#include<cstdio>
int m,a[25],tmp[25];
int dfs(int u,int id)
{
while(a[u]==id&&u)u--;
if(!u)return 0;
return dfs(u-1,6-a[u]-id)+tmp[u-1];
}
int main()
{
scanf("%d