贪心算法-135

 1 int candy(int* ratings, int ratingsSize) {
 2     int *candys = NULL;
 3     int resulte = 0;
 4 
 5     candys = (int *)malloc(sizeof(int)*ratingsSize);
 6     if (NULL == candys)
 7     {
 8         return 0;
 9     }
10     candys[0] = 1;
11     for (int i = 1; i < ratingsSize; i++)
12     {
13         if (ratings[i] > ratings[i-1])
14         {
15             candys[i] = candys[i-1] + 1;
16         }
17         else
18         {
19             candys[i] = 1;
20         }
21     }
22     resulte += candys[ratingsSize - 1];
23     for (int i = ratingsSize - 1; i > 0; i--)
24     {
25         if (ratings[i - 1] > ratings[i])
26         {
27             candys[i - 1] = fmax(candys[i - 1], candys[i] + 1);
28         }
29         resulte += candys[i - 1];
30     }
31     return resulte;
32 }

 1 int candy(int* ratings, int ratingsSize) {
 2     int pre = 1, inc = 1, dec = 0;
 3     int result = 1;
 4 
 5     for(int i = 1; i < ratingsSize; i++)
 6     {
 7         if (ratings[i] >= ratings[i-1])
 8         {
 9             dec = 0;
10             pre = ratings[i] == ratings[i-1] ? 1 : pre + 1;
11             result += pre;
12             inc = pre;
13         }
14         else
15         {
16             dec++;
17             if (dec == inc)
18                 dec += 1;
19             pre = 1;
20             result += dec;
21         }
22     }
23     return result;
24 }

标签：pre,ratings,ratingsSize,int,算法,candys,135,dec,贪心
来源： https://www.cnblogs.com/ainingxiaoguai/p/16463465.html