Compilare: main.cpp: In function 'int main()': main.cpp:83:9: warning: unused variable 'flow' [-Wunused-variable] int flow = G.mxFlow(1, dst); ^~~~ main.cpp: In member function 'void MaxFlow::resetFlow()': main.cpp:59:53: warning: iteration 119 invokes undefined behavior [-Waggressive-loop-optimizations] for (int j = 1; j <= N; ++j) flow[i][j] = 0; ~~~~~~~~~~~^~~ main.cpp:59:31: note: within this loop for (int j = 1; j <= N; ++j) flow[i][j] = 0; ~~^~~~