LeetCode 1021:Remove Outermost Parentheses

C语言

char * removeOuterParentheses(char * S){int len = strlen(S);int j = 0;int sum = 0;for(int i = 0; i < len; i++){if (S[i] == '('){sum += 1;}else if (S[i] == ')'){sum -= 1;}if (S[i] == '(' && sum > 1){S[j] = '(';j++;}else if (S[i] == ')' && sum > 0){S[j] = ')';j++;}else if (S[i] != '(' && S[i] != ')'){S[j] = S[i];j++;}}S[j] = '';return S;
}