class Flow {
private:
long long int V, E, S, T;
long long int *excess;
long long int *height;
vector<Edge> *graph;
queue<long long int> active;
long long int *positionInAdj;
long long int counter;
public:
Flow(long long int V, long long int E) {
Flow::V = V;
Flow::E = E;
Flow::graph = new vector<Edge>[Flow::V + 1];
Flow::excess = new long long int[Flow::V + 1];
Flow::height = new long long int[Flow::V + 1];
Flow::positionInAdj = new long long int[Flow::V + 1];
counter = 0;
}
virtual ~Flow() {
delete[] Flow::graph;
delete[] Flow::excess;
delete[] Flow::height;
delete[] Flow::positionInAdj;
}
void addEdge(long long int from, long long int to, long long int cap);
void setSource(long long int S);
void setSink(long long int T);
void clearPositionInAdj();
long long int getFlow();
void bfs(long long int start);
void preFlow();
void relabel(long long int u);
void discharge(long long int u);
void push(long long int u, Edge &edge);
void globalRelabeling();
};
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