Compilare: main.cpp: In function 'int main()': main.cpp:92:9: warning: unused variable 'flow' [-Wunused-variable] int flow = maxFlow(1, dst); ^~~~ main.cpp: In function 'void resetFlow()': main.cpp:65:48: warning: iteration 119 invokes undefined behavior [-Waggressive-loop-optimizations] for(int j = 1; j <= N; ++j) flow[i][j] = 0; ~~~~~~~~~~~^~~ main.cpp:65:26: note: within this loop for(int j = 1; j <= N; ++j) flow[i][j] = 0; ~~^~~~