  In this paper, we study stellar light curves from the TESS satellite
(Transiting Exoplanet Survey Satellite) for the presence of stellar flares. The
main aim is to detect stellar flares using two-minutes cadence data and to
perform statistical analysis. To find and analyze stellar flares we prepared
automatic software WARPFINDER. We implemented three methods described in this
paper: trend, difference, and profile fitting. Automated search for flares was
accompanied by visual inspection. Using our software we analyzed two-minute
cadence light curves of 330,000 stars located in the first 39 sectors of TESS
observations. As a result, we detected over 25,000 stars showing flare activity
with the total number of more than 140,000 flares. This means that about 7.7%
of all the analyzed objects are flaring stars. The estimated flare energies
range between $10^{31}$ and $10^{36}$ erg. We prepared a preliminary preview of
the statistical distribution of parameters such as a flare duration, amplitudes
and energy, and compared it with previous results. The relationship between
stellar activity and its spectral type, temperature and mass was also
statistically analyzed. Based on the scaling laws, we estimated the average
values of the magnetic field strength and length of the flare loops. In our
work, we used both single (about 60%), and double (about 40%) flare profiles to
fit the observational data. The components of the double profile are supposed
to be related to the direct heating of the photosphere by non-thermal electrons
and back warming processes.
