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New C++ Solution "Largest Perimeter Triangle"

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	`1`	`+classSolution {`
	`2`	`+public:`
	`3`	`+intlargestPerimeter(vector<int>& A) {`
	`4`	`+if (A.size() <3)return0;`
	`5`	`+sort(A.begin(), A.end(), greater<int>());`
	`6`	`+for (auto it = A.begin(); it != A.end() -2; ++it) {`
	`7`	`+if (it < (it +1) + *(it +2))`
	`8`	`+return it + (it +1) + *(it +2);`
	`9`	`+ }`
	`10`	`+return0;`
	`11`	`+ }`
	`12`	`+};`
	`13`	`+`

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