POJ 3176 Cow Bowling
http://poj.org/problem?id=3176
定义dp[i][j] 到这个点 能取得的最大值
转移方程
dp[i][j] = court[i][j] + max(dp[i-1][j-1], dp[i-1][j]);
1 #include <iostream> 2 #include <stdio.h> 3 #include <string.h> 4 #include <algorithm> 5 6 using namespace std; 7 8 int n; 9 int court[355][355], dp[355][355]; 10 bool OK(int x, int y, int n) 11 { 12 if (x < 0 || x > n || y < 0 || y > n) return false; 13 return true; 14 } 15 16 //定义dp[i][j] 到达(i, j)这个点 所能取得的最大值 17 int main() 18 { 19 freopen("in.txt", "r", stdin); 20 scanf("%d", &n); 21 for (int i = 0; i < n; i++) 22 { 23 for (int j = 0; j <= i; j++) 24 { 25 scanf("%d", &court[i][j]); 26 } 27 } 28 memset(dp, 0, sizeof(dp)); 29 dp[0][0] = court[0][0]; 30 for (int i = 1; i < n; i++) 31 { 32 for (int j = 0; j <= i; j++) 33 { 34 if (j == 0) dp[i][j] = court[i][j] + dp[i-1][j]; 35 else if (j == i) dp[i][j] = court[i][j] + dp[i-1][j-1]; 36 else dp[i][j] = court[i][j] + max(dp[i-1][j-1], dp[i-1][j]); 37 } 38 } 39 sort(dp[n-1], dp[n-1]+n); 40 reverse(dp[n-1], dp[n-1]+n); 41 cout << dp[n-1][0] << endl; 42 return 0; 43 }