Submission #112966

#	Time	Username	Problem	Language	Result	Execution time	Memory
112966		imaxblue	Highway Tolls (IOI18_highway)	C++17	Compilation error	0 ms	0 KiB

highway

int n, m, a, b, sz[90005], ds[90005];
ll dis;
vector<pii> v[90005];
bool u[90005], typ;
vector<int> on;
vector<int> out;
bool split = 0;
void dfs0(int N, int P){
  sz[N] = 1;
  for(auto i:v[N]){
    if (i.x == P || u[i.y]) continue;
    dfs0(i.x, N);
    sz[N]+=sz[i.x];
  }
  //cout <<"*" << N << ' ' << sz[N] << endl;
}
void dfs2(int N, int P){
  for(auto i:v[N]){
    if (u[i.y] || i.x == P) continue;
    on[i.y] = typ;
    dfs2(i.x, N);
  }
}
void dfs3(int N, int P, int D){
  ds[N] = D;
  for(auto i:v[N]){
    if (u[i.y] || i.x == P) continue;
    dfs3(i.x, N, D+1);
  }
}
void dfs(int N){
  //cout << "?";
  dfs0(N, -1);
  bool done = 0;
  int R = N;
  int S = sz[N], P = -1, last;
  if (S == 1){
    out.pb(N);
    return;
  }
  while(!done){
    done = 1;
    for(auto i:v[N]){
      if (u[i.y] || i.x == P) continue;
      if (sz[i.x]*2 >= S){
        P = N;
        N = i.x;
        last = i.y;
        done = 0;
        break;
      }
    }
  }
  bool spec=0;
  if (P == -1){
    spec= 1;
    int hs = 0;
    for(auto i:v[N]){
      if (u[i.y]) continue;
      if (sz[i.x] > hs){
          hs = sz[i.x];
          P = i.x;
          last = i.y;
      }
    }
  }
  //cout << "?" << last << endl;
  on[last] = 1;
  typ = 0;
  dfs2(P, N);
  typ = 1;
  dfs2(N, P);
  bool res1 = (ask(on) - dis > 0);
  typ = 1;
  dfs2(P, N);
  typ = 0;
  dfs2(N, P);
  bool res2 = (ask(on) - dis > 0);

  //cout << "*" << N << ' ' << P << ' ' << last << ' ' << res1 << ' ' << res2 << ' ' << split<< endl;
    typ = 0;
    dfs2(P, N);
    typ = 0;
    dfs2(N, P);
    on[last] = 0;
  if (res1 == 0 && res2 == 0 && split == 0){
    out.pb(N); out.pb(P);
    return;
  } else if (res1 == 0 && res2 == 0){
    out.pb(R);
    return;
  }
  u[last] = 1;
  if (!split){
    if (res1 && res2){
      split = 1;
      dfs3(N, -1, 0);
    }
    if (res1){
      dfs(N);
    }
    if (res2){
      dfs(P);
    }
  }
  else if (split){
    if (ds[N] > ds[P]){
      if (res1 ){
        dfs(N);
      } else {
        dfs(P);
      }
    } else {
      if (res2){
        dfs(P);
      } else {
        dfs(N);
      }
    }
  }
}
void find_pair(int N,vector<int> U, vector<int> V, int A, int B){
  n = N; m = U.size(); a = A; b = B;
  on = vector<int>(m, 0);
  fox(l, m){
    v[U[l]].pb(mp(V[l], l));
    v[V[l]].pb(mp(U[l], l));
  }
  dis = ask(vector<int>(m, 0));
  dfs(0);
  //cout << out.size() << endl;
  answer(out[0], out[1]);
}

Compilation message (stderr)

highway.cpp:3:1: error: 'll' does not name a type
 ll dis;
 ^~
highway.cpp:4:1: error: 'vector' does not name a type
 vector<pii> v[90005];
 ^~~~~~
highway.cpp:6:1: error: 'vector' does not name a type
 vector<int> on;
 ^~~~~~
highway.cpp:7:1: error: 'vector' does not name a type
 vector<int> out;
 ^~~~~~
highway.cpp: In function 'void dfs0(int, int)':
highway.cpp:11:14: error: 'v' was not declared in this scope
   for(auto i:v[N]){
              ^
highway.cpp: In function 'void dfs2(int, int)':
highway.cpp:19:14: error: 'v' was not declared in this scope
   for(auto i:v[N]){
              ^
highway.cpp:21:5: error: 'on' was not declared in this scope
     on[i.y] = typ;
     ^~
highway.cpp:21:5: note: suggested alternative: 'n'
     on[i.y] = typ;
     ^~
     n
highway.cpp: In function 'void dfs3(int, int, int)':
highway.cpp:27:14: error: 'v' was not declared in this scope
   for(auto i:v[N]){
              ^
highway.cpp: In function 'void dfs(int)':
highway.cpp:39:5: error: 'out' was not declared in this scope
     out.pb(N);
     ^~~
highway.cpp:39:5: note: suggested alternative: 'auto'
     out.pb(N);
     ^~~
     auto
highway.cpp:44:16: error: 'v' was not declared in this scope
     for(auto i:v[N]){
                ^
highway.cpp:59:16: error: 'v' was not declared in this scope
     for(auto i:v[N]){
                ^
highway.cpp:69:3: error: 'on' was not declared in this scope
   on[last] = 1;
   ^~
highway.cpp:69:3: note: suggested alternative: 'n'
   on[last] = 1;
   ^~
   n
highway.cpp:74:16: error: 'ask' was not declared in this scope
   bool res1 = (ask(on) - dis > 0);
                ^~~
highway.cpp:74:16: note: suggested alternative: 'last'
   bool res1 = (ask(on) - dis > 0);
                ^~~
                last
highway.cpp:74:26: error: 'dis' was not declared in this scope
   bool res1 = (ask(on) - dis > 0);
                          ^~~
highway.cpp:74:26: note: suggested alternative: 'dfs'
   bool res1 = (ask(on) - dis > 0);
                          ^~~
                          dfs
highway.cpp:88:5: error: 'out' was not declared in this scope
     out.pb(N); out.pb(P);
     ^~~
highway.cpp:88:5: note: suggested alternative: 'auto'
     out.pb(N); out.pb(P);
     ^~~
     auto
highway.cpp:91:5: error: 'out' was not declared in this scope
     out.pb(R);
     ^~~
highway.cpp:91:5: note: suggested alternative: 'auto'
     out.pb(R);
     ^~~
     auto
highway.cpp: At global scope:
highway.cpp:123:22: error: 'vector' has not been declared
 void find_pair(int N,vector<int> U, vector<int> V, int A, int B){
                      ^~~~~~
highway.cpp:123:28: error: expected ',' or '...' before '<' token
 void find_pair(int N,vector<int> U, vector<int> V, int A, int B){
                            ^
highway.cpp: In function 'void find_pair(int, int)':
highway.cpp:124:14: error: 'U' was not declared in this scope
   n = N; m = U.size(); a = A; b = B;
              ^
highway.cpp:124:28: error: 'A' was not declared in this scope
   n = N; m = U.size(); a = A; b = B;
                            ^
highway.cpp:124:35: error: 'B' was not declared in this scope
   n = N; m = U.size(); a = A; b = B;
                                   ^
highway.cpp:125:3: error: 'on' was not declared in this scope
   on = vector<int>(m, 0);
   ^~
highway.cpp:125:3: note: suggested alternative: 'n'
   on = vector<int>(m, 0);
   ^~
   n
highway.cpp:125:8: error: 'vector' was not declared in this scope
   on = vector<int>(m, 0);
        ^~~~~~
highway.cpp:125:15: error: expected primary-expression before 'int'
   on = vector<int>(m, 0);
               ^~~
highway.cpp:126:7: error: 'l' was not declared in this scope
   fox(l, m){
       ^
highway.cpp:126:3: error: 'fox' was not declared in this scope
   fox(l, m){
   ^~~
highway.cpp:130:3: error: 'dis' was not declared in this scope
   dis = ask(vector<int>(m, 0));
   ^~~
highway.cpp:130:3: note: suggested alternative: 'dfs'
   dis = ask(vector<int>(m, 0));
   ^~~
   dfs
highway.cpp:130:20: error: expected primary-expression before 'int'
   dis = ask(vector<int>(m, 0));
                    ^~~
highway.cpp:130:9: error: 'ask' was not declared in this scope
   dis = ask(vector<int>(m, 0));
         ^~~
highway.cpp:133:10: error: 'out' was not declared in this scope
   answer(out[0], out[1]);
          ^~~
highway.cpp:133:10: note: suggested alternative: 'auto'
   answer(out[0], out[1]);
          ^~~
          auto
highway.cpp:133:3: error: 'answer' was not declared in this scope
   answer(out[0], out[1]);
   ^~~~~~