  We present a simple trick that allows to consider the sum of all connected
Feynman diagrams at fixed position of interaction vertices for general
fermionic models. With our approach one achieves superior performance compared
to Diagrammatic Monte Carlo, while rendering the algorithmic part dramatically
simpler. As we consider the sum of all connected diagrams at once, we allow for
cancellations between diagrams with different signs, alleviating the sign
problem. Moreover, the complexity of the calculation grows exponentially with
the order of the expansion, which should be constrasted with the factorial
growth of the standard diagrammatic technique. We illustrate the efficiency of
the technique for the two-dimensional Fermi-Hubbard model.
