Compilare: main.cpp: In member function 'long long int MinCostMaxFlow::find(int, int, int)': main.cpp:61:21: warning: unused variable 'dist' [-Wunused-variable] int dist = aux.first, v = aux.second; ^~~~ main.cpp: In function 'int main()': main.cpp:129:38: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=] printf("%d", mcmf.find(S, D, 1e9)); ^ main.cpp:121:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("fmcm.in","r",stdin); ^ main.cpp:122:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("fmcm.out","w",stdout); ^ main.cpp:124:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &n, &m, &S, &D); ^ main.cpp:126:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &x, &y, &c, &z); ^