TADM2E 1.1
From Algorithm Wiki
<math>a + b < \min(a,b) \Leftrightarrow a < 0 \and b < 0</math>
If both a and b are negative, <math>a + b < min(a, b)</math>. For example
<math>a = -5</math> <math>b = -7</math> <math>a+ b = -5 + (-7) = -12</math> <math>min(-5, -7) = -7</math>