NeuralNetwork brain({ 2,4,1} );
for(int i = 0; i < 10000; i++)
{
    brain.train( {0.0, 0.0}, {0.0} );
    brain.train( {0.0, 1.0}, {1.0} );
    brain.train( {1.0, 0.0}, {1.0} );
    brain.train( {1.0, 1.0}, {0.0} );
}
Value r = brain.run( {1, 0} );
printf("%f\n", r[0]);  // 0.992100