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122.java
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122.java
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sample 0 ms submission
class Solution {
public int maxProfit(int[] prices) {
if (prices == null || prices.length == 0) {
return 0;
}
int res = 0;
for (int i = 0; i < prices.length; i++) {
if (i == 0) {
continue;
}
int incr = prices[i] - prices[i - 1];
if (incr > 0) {
res += incr;
}
}
return res;
}
}
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sample 34476 kb submission
class Solution {
public int maxProfit(int[] prices) {
if(prices.length==0||prices==null)return 0;
int i = 0;
int valley = prices[0];
int peak = prices[0];
int maxprofit = 0;
while (i < prices.length - 1) {
while (i < prices.length - 1 && prices[i] >= prices[i + 1])
i++;
valley = prices[i];
while (i < prices.length - 1 && prices[i] <= prices[i + 1])
i++;
peak = prices[i];
maxprofit += peak - valley;
}
return maxprofit;
}
}
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