2723. Add Two Promises

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Given two promises promise1 and promise2, return a new promise. promise1 and promise2 will both resolve with a number. The returned promise should resolve with the sum of the two numbers. Example 1: Input: promise1 = new Promise(resolve => setTimeout(() => resolve(2), 20)), promise2 = new Promise(resolve => setTimeout(() => resolve(5), 60)) Output: 7 Explanation: The two input promises resolve

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solution.cppC++17

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