Eroare de compilare: user.cpp:235:31: error: redeclaration ‘MinCostMaxFlow::NIL’ differs in ‘constexpr’ constexpr int MinCostMaxFlow::NIL = -1; ^ user.cpp:57:22: error: from previous declaration ‘MinCostMaxFlow::NIL’ static const int NIL; ^ user.cpp:235:31: error: ‘MinCostMaxFlow::NIL’ declared ‘constexpr’ outside its class constexpr int MinCostMaxFlow::NIL = -1; ^ user.cpp:235:31: error: declaration of ‘const int MinCostMaxFlow::NIL’ outside of class is not definition [-fpermissive] user.cpp:236:31: error: redeclaration ‘MinCostMaxFlow::INF’ differs in ‘constexpr’ constexpr int MinCostMaxFlow::INF = numeric_limits<int>::max(); ^ user.cpp:58:22: error: from previous declaration ‘MinCostMaxFlow::INF’ static const int INF; ^ user.cpp:236:31: error: ‘MinCostMaxFlow::INF’ declared ‘constexpr’ outside its class constexpr int MinCostMaxFlow::INF = numeric_limits<int>::max(); ^ user.cpp:236:31: error: declaration of ‘const int MinCostMaxFlow::INF’ outside of class is not definition [-fpermissive] user.cpp: In function ‘int main()’: user.cpp:240:35: 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); ^ user.cpp:241:37: 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); ^ user.cpp:244:38: 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, &T); ^ user.cpp:251:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &x, &y, &cap, &cst); ^