Compilare: main.cpp: In function 'void solve()': main.cpp:72:15: warning: unused variable 'max_flow' [-Wunused-variable] long long max_flow = mfmc(); ^~~~~~~~ main.cpp: In function 'int main()': main.cpp:121:9: warning: unused variable 'i' [-Wunused-variable] int i, x, y, c; ^ main.cpp:121:12: warning: unused variable 'x' [-Wunused-variable] int i, x, y, c; ^ main.cpp:121:15: warning: unused variable 'y' [-Wunused-variable] int i, x, y, c; ^ main.cpp:121:18: warning: unused variable 'c' [-Wunused-variable] int i, x, y, c; ^