Compilare: user.cpp: In function ‘void bellmanford()’: user.cpp:27:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < g[from].size(); ++ k) { ^ user.cpp: In function ‘void dijkstra()’: user.cpp:56:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < g[from].size(); ++ k) { ^ user.cpp: In function ‘int main()’: user.cpp:107:43: warning: narrowing conversion of ‘g[to].std::vector<_Tp, _Alloc>::size<Muchie, std::allocator<Muchie> >()’ from ‘std::vector<Muchie>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] g[from].push_back({to, g[to].size(), 0, cap, cost}); ^ user.cpp:108:47: warning: narrowing conversion of ‘(g[from].std::vector<_Tp, _Alloc>::size<Muchie, std::allocator<Muchie> >() + 4294967295u)’ from ‘std::vector<Muchie>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] g[to].push_back({from, g[from].size() - 1, 0, 0, -cost}); ^ user.cpp:99:35: 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:100:37: 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:102:46: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &n, &m, &sursa, &drena); ^ user.cpp:106:51: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &from, &to, &cap, &cost); ^