标签:des style blog http color io os ar java
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 1114 Accepted Submission(s): 568
dp[i][0][0]+=dp[i-1][0][1]+dp[i-1][0][0]
dp[i][0][1]+=dp[i-1][1][0]+dp[i-1][1][1]
dp[i][1][0]+=dp[i-1][0][0]
dp[i][1][1]+=dp[i-1][1][0]+dp[i-1][1][1]
最后取ans求总数就行了
#include<cstdio> #include<iostream> #include<cstring> #include<cmath> #include<stdlib.h> #include<algorithm> using namespace std; const int mod=9997; const int MAXN=10000+5; int dp[MAXN][2][2],n,ans[MAXN]; void init() { memset(dp,0,sizeof(dp)); memset(ans,0,sizeof(ans)); ans[0]=0;ans[1]=2;ans[2]=4; dp[2][0][0]=dp[2][0][1]=dp[2][1][0]=dp[2][1][1]=1; dp[1][1][0]=dp[1][0][0]=1; for(int i=3;i<MAXN;i++) { dp[i][0][0]=(dp[i][0][0]+(dp[i-1][0][1]+dp[i-1][0][0])%mod)%mod; dp[i][0][1]=(dp[i][0][1]+(dp[i-1][1][0]+dp[i-1][1][1])%mod)%mod; dp[i][1][0]=(dp[i][1][0]+(dp[i-1][0][0])%mod)%mod; dp[i][1][1]=(dp[i][1][1]+(dp[i-1][1][0]+dp[i-1][1][1])%mod)%mod; ans[i]=(dp[i][0][0]+dp[i][0][1]+dp[i][1][0]+dp[i][1][1])%mod; } } int main() { init(); while(scanf("%d",&n)&&n!=-1) { printf("%d\n",ans[n]); } return 0; }
标签:des style blog http color io os ar java
原文地址:http://www.cnblogs.com/clliff/p/4029236.html