HOW TO SOLVE THIS QUESTION QUES
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if (n % 2 == 0) cout << "Even\n"; else cout << "Odd\n";
can you explain more some proof will help
In graph with odd number of vertexes exist vertex with even number of incident edges because sum of numbers of incident edges is 2 * number of edges, so it is even. But sum of odd number of odd numbers is odd)