Submission #730341

#	Time	Username	Problem	Language	Result	Execution time	Memory
730341		Andrei_Calota	Speedrun (RMI21_speedrun)	C++14	100 / 100	138 ms	880 KiB

speedrun

#include <bits/stdc++.h>
#include<speedrun.h>

using namespace std;

const int NMAX = 1e3;
const int BITS = 20, HALF = 10;
const int ROOT = 1, NONE = 0;

int par[1 + NMAX];
vector<int> tree[1 + NMAX];
int lastNode; int nextPreoder[1 + NMAX];

void DFSassign (int root, int p) {
    par[root] = p;
    nextPreoder[lastNode] = root; lastNode = root;
    for (int node : tree[root])
       if (node != p)
          DFSassign (node, root);
}

/**bool bits[50][20];
void setHint (int node, int bit, bool value) {
   bits[node][bit] = value;
}
bool getHint (int node, int bit) {
   return bits[node][bit];
}**/

void assignHints (int substask, int N, int A[], int B[]) {
   setHintLen (BITS);
   for (int i = 1; i < N; i ++) {
      tree[A[i]].push_back (B[i]);
      tree[B[i]].push_back (A[i]);
   }
   DFSassign (ROOT, NONE);
   for (int node = 1; node <= N; node ++)
      for (int bit = 0; bit < HALF; bit ++)
         if (par[node] & (1 << bit))
           setHint (node, bit + 1, true);

   for (int node = 1; node <= N; node ++)
      for (int bit = HALF; bit < BITS; bit ++)
         if (nextPreoder[node] & (1 << (bit - HALF)))
           setHint (node, bit + 1, true);
}



int getPar () {
   int p = 0;
   for (int bit = 0; bit < HALF; bit ++)
      if (getHint (bit + 1) == true)
        p = p + (1 << bit);
    return p;
}
int getNextPreoder () {
   int preord = 0;
   for (int bit = HALF; bit < BITS; bit ++)
      if (getHint (bit + 1) == true)
        preord = preord + (1 << (bit - HALF));
   return preord;
}

void speedrun (int subtask, int N, int start) {
   getLength ();

   while (getPar () > 0)
      goTo (getPar ());


   while (getNextPreoder () != NONE) {
      int target = getNextPreoder ();
      while (!goTo (target))
         goTo (getPar ());
   }
}

• Subtask 1: 21 / 21
• Subtask 2: 8 / 8
• Subtask 3: 19 / 19
• Subtask 4: 12 / 12
• Subtask 5: 40 / 40