摘要: 题意: f[0]=0,f[i]=f[i-1]+a or b. 求满足L#define LL long longusing namespace std;const int MOD = (int) 1e9 + 7;const int M = 105;LL N, a, b, L, R;LL dp[... 阅读全文
posted @ 2015-04-29 23:30 keambar 阅读(125) 评论(0) 推荐(0) 编辑