Submission #863878

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
863878	2023-10-21T10:06:55 Z	prairie2022	Railway Trip 2 (JOI22_ho_t4)	C++17	Compilation error	0 ms	0 KB

Main

    for(cin >> q; q; q--){
        cin >> s >> t;
        vector<vector<int>> way(n+1);
        for(int i=0; i<m; i++){
            if(near(s, rail[i])) way[near(s, rail[i])].push_back(i);
        }
        vector<int> dp(n+1, -1);
        dp[s] = 0;
        int l = s, r = s;
        queue<int> qu;
        for(qu.push(s); !qu.empty() || qu.front()==t; qu.pop()){
            //cout << qu.front() << " : ";
            for(const int &w: way[qu.front()]){
                //cout << w << ' ';
                if(rail[w].S>r){
                    for(int i=r+1; i<=rail[w].S; i++){
                        dp[i] = dp[qu.front()]+1;
                        qu.push(i);
                    }
                    r = rail[w].S;
                }
                else if(rail[w].S<l){
                    for(int i=l-1; i>=rail[w].S; i--){
                        dp[i] = dp[qu.front()]+1;
                        qu.push(i);
                    }
                    l = rail[w].S;
                }
            }
            //cout << '\n';
        }
        cout << dp[t] << '\n';
    }
    return 0;
}

Compilation message

Main.cpp:1:5: error: expected unqualified-id before 'for'
    1 |     for(cin >> q; q; q--){
      |     ^~~
Main.cpp:1:19: error: 'q' does not name a type
    1 |     for(cin >> q; q; q--){
      |                   ^
Main.cpp:1:22: error: 'q' does not name a type
    1 |     for(cin >> q; q; q--){
      |                      ^
Main.cpp:34:5: error: expected unqualified-id before 'return'
   34 |     return 0;
      |     ^~~~~~
Main.cpp:35:1: error: expected declaration before '}' token
   35 | }
      | ^