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hello-algo/codes/c/chapter_greedy/max_capacity.c

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/**
* File: max_capacity.c
* Created Time: 2023-09-15
* Author: xianii (xianyi.xia@outlook.com)
*/
#include "../utils/common.h"
/* 求最小值 */
int myMin(int a, int b) {
return a < b ? a : b;
}
/* 求最大值 */
int myMax(int a, int b) {
return a < b ? a : b;
}
/* 最大容量:贪心 */
int maxCapacity(int ht[], int htLength) {
// 初始化 i, j使其分列数组两端
int i = 0;
int j = htLength - 1;
// 初始最大容量为 0
int res = 0;
// 循环贪心选择,直至两板相遇
while (i < j) {
// 更新最大容量
int capacity = myMin(ht[i], ht[j]) * (j - i);
res = myMax(res, capacity);
// 向内移动短板
if (ht[i] < ht[j]) {
i++;
} else {
j--;
}
}
return res;
}
/* Driver Code */
int main(void) {
int ht[] = {3, 8, 5, 2, 7, 7, 3, 4};
// 贪心算法
int res = maxCapacity(ht, sizeof(ht) / sizeof(int));
printf("最大容量为 %d\n", res);
return 0;
}