Revise paste Untitled

#include <bits/stdc++.h>

using namespace std;
const int maxn = 100;
int n, m;
int graph[maxn][maxn];
bool bfs(vector<vector<int>> & r_graph, int S, int E, vector<int> & parent) {
    vector<bool> visited(n + 1, false);
    visited[S] = true;
    queue<int> q;
    q.push(S);
    parent[S] = -1;

while(!q.empty()) {
        int node = q.front();
        q.pop();

for(int i = 0; i < n; i++) {
            if(!visited[i] and r_graph[node][i] > 0) {
                if(i == E) {
                    parent[i] = node;
                    return true;
                }
                q.push(i);
                visited[i] = true;
                parent[i] = node;
            }
        }
    }
    return false;
}
int max_flow(int S, int E) {
    vector<vector<int>> r_graph(n, vector<int>(n, 0));
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < n; j++) {
            r_graph[i][j] = graph[i][j];
        }
    }
    vector<int> parent(n);
    int res = 0;
    while(bfs(r_graph, S, E, parent)) {
        int path_flow = 2e9;
        for(int i = E; i != S; i = parent[i]) {
            path_flow = min(path_flow, r_graph[parent[i]][i]);
        }
        for(int i = E; i != S; i = parent[i]) {
            r_graph[parent[i]][i] -= path_flow;
            r_graph[i][parent[i]] += path_flow;
        }
        res += path_flow;
    }
    return res;
}
int main() {
    int m;
    cin >> m;
    n = 26;
    for(int i = 0; i < m; i++) {
        char a, b;
        cin >> a >> b;
        int c;
        cin >> c;

graph[a - 'A'][b - 'A'] = c;
    }
    cout << "DA" << endl;
    cout << max_flow(('S' - 'A'), ('T' - 'A')) << endl;

return 0;
}