void RMQ_max_init( int n ) { memset(dp, 0x00, sizeof(dp)); for(int i = 1; i <= n; i++) dp[i][0] = a[i]; for(int j = 1; (1<<j) <= n; j++) for(int i = 1; i+(1<<j)-1 <= n; i++) dp[i][j] = max(dp[i][j-1], dp[i+(1<<(j-1))][j-1] ); } int RMQ_max( int L, int R, int n ) { int k = 0; while( (1<<(k+1)) <= R-L+1 ) k++; return max( dp[L][k], dp[R-(1<<k)+1][k] ); }
时间: 2024-10-12 03:18:20