Best time to buy and sell stock

Signed-off-by: begeekmyfriend <[email protected]>

121_best_time_to_buy_and_sell_stock/Makefile

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+all:
+	gcc -O2 -o test stock.c

121_best_time_to_buy_and_sell_stock/stock.c

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+#include <stdio.h>
+#include <stdlib.h>
+
+static int maxProfit(int* prices, int pricesSize)
+{
+    int i, j, diff = 0;
+    for (i = 0; i < pricesSize; i++) {
+        for (j = i + 1; j < pricesSize; j++) {
+            diff = prices[j] - prices[i] > diff ? prices[j] - prices[i] : diff;
+        }
+    }
+    return diff;
+}
+
+int main(int argc, char **argv)
+{
+    int i, count = argc - 1;
+    int *nums = malloc(count * sizeof(int));
+    for (i = 0; i < count; i++) {
+        nums[i] = atoi(argv[i + 1]);
+    }
+    printf("%d\n", maxProfit(nums, count));
+    return 0;
+}