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#include "leetcode.h"
class Solution {
public:
string reverseWords(string s) {
reverse(s.begin(), s.end());
int l = 0, r = 0, i = 0, n = s.size();
while (i < n) {
while (i < n && s[i] != ' ')
s[r++] = s[i++];
if (l < r) {
reverse(s.begin() + l, s.begin() + r);
if (r == n)
break;
s[r++] = ' ';
l = r;
}
++i;
}
if (r > 0 && s[r - 1] == ' ')
--r;
s.resize(r);
return s;
}
};
int main() {
Solution obj;
cout << obj.reverseWords("the sky is blue");
}
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