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36 lines (33 loc) · 822 Bytes
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Copy pathsolution682.java
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36 lines (33 loc) · 822 Bytes
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import java.util.Stack;
public class solution682 {
private Stack<Integer> stack;
public solution682(){
stack = new Stack<>();
}
public int calPoints(String[] ops) {
for(String op:ops)
{
if(op.equals("+"))
{
int value = stack.pop();
int value2 = stack.peek();
stack.push(value);
stack.push(value+value2);
}else if (op.equals("C"))
{
stack.pop();
}else if(op.equals("D"))
{
stack.push(stack.peek()*2);
}else{
stack.push(Integer.valueOf(op));
}
}
int ans = 0;
for(int a:stack)
{
ans = ans+a;
}
return ans;
}
}