Compilare: user.cpp: In member function ‘void maxFlow::addEdge(int, int, int)’: user.cpp:25:39: warning: narrowing conversion of ‘(((maxFlow*)this)->maxFlow::E.std::vector<_Tp, _Alloc>::size<maxFlow::Edge, std::allocator<maxFlow::Edge> >() + 1u)’ from ‘std::vector<maxFlow::Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] E.push_back({x, y, c, 0, E.size() + 1}); ~~~~~~~~~^~~ user.cpp:27:39: warning: narrowing conversion of ‘(((maxFlow*)this)->maxFlow::E.std::vector<_Tp, _Alloc>::size<maxFlow::Edge, std::allocator<maxFlow::Edge> >() - 1u)’ from ‘std::vector<maxFlow::Edge>::size_type {aka unsigned int}’ to ‘int’ inside { } [-Wnarrowing] E.push_back({y, x, 0, 0, E.size() - 1}); ~~~~~~~~~^~~ user.cpp: In member function ‘int maxFlow::baga(int, int)’: user.cpp:55:43: warning: suggest parentheses around comparison in operand of ‘==’ [-Wparentheses] if (minim == E[E[it].inv].ramas() > 0 || from[E[it].other(d)] == -1) ~~~~~~~~~~~~~~~~~~~~~^~~ user.cpp: In function ‘int main()’: user.cpp:80:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.in", "r", stdin); ^ user.cpp:81:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.out", "w", stdout); ^ user.cpp:84:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:88:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &c); ^