added solution

CodeChef DSA Learning series Solutions/Easy Problems to get started/Valid Triangle Or Not/README.md

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+You're given the length of three sides a, b, and c respectively. Now check if these three sides can form a triangle or not. Print "YES"(without quotes) if it can form a valid triangle with an area greater than 0, otherwise print "NO" (without quotes).
+
+Input:
+First-line will contain three numbers a, b, and c separated by space.
+Output:
+Print "YES"(without quotes) if these sides can form a valid triangle, otherwise print "NO" (without quotes).
+
+Constraints
+1≤a,b,c≤106
+Sample Input 1:
+2 4 3
+Sample Output 1:
+YES
+Sample Input 2:
+1 1 4
+Sample Output 2:
+NO
+EXPLANATION:
+In the first example, (2, 4, 3) can form a triangle with an area greater than 0.
+In the second example, (1, 1, 4) will never form a valid triangle.

CodeChef DSA Learning series Solutions/Easy Problems to get started/Valid Triangle Or Not/Solution.cpp

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+#include <iostream>
+using namespace std;
+
+int main()
+{
+ int a, b, c;
+ cin >> a >> b >> c;
+ if (a + b < c a + c < b b + c < a)
+ cout << "NO";
+ else
+ cout << "YES";
+ return 0;
+}