oj.uz

Submission #198340

# Submission time Handle Problem Language Result Execution time Memory
198340 2020-01-25T16:26:39 Z cjoa Klasika (COCI20_klasika) C++11
33 / 110
 1191 ms 524288 KB 
#include <cstdio>

#include <cstring>

#include <string>
#include <vector>
#include <algorithm>
#include <map>
#include <set>
//#include <queue>
//#include <stack>
#include <cassert>

#include <unistd.h>

using namespace std;

#define SZ(a) int((a).size())
#define REP(i,n) for(int i=0,_n=(n);i<_n;++i)
#define FOR(i,a,b) for(int i=(a),_b=(b);i<=_b;++i)

#define DEBUG(x) cerr << #x << ": " << x << endl
#define HIGHESTSETBIT(mask) ( sizeof(int)*8-1-__builtin_clz((mask)) )

typedef long long llong;
typedef vector<int> VI;
typedef vector<VI> VVI;

class BinaryTrie {
   struct BinaryTrieNode {
      int child[2];
      BinaryTrieNode() {
         child[0] = child[1] = -1;
      }
   };

   static vector<BinaryTrieNode> NODES;

   static int newNode() {
      NODES.push_back( BinaryTrieNode() );
      return int(NODES.size()) - 1;
   }

   int size;
   int root;
   static const int NUM_BITS = 30;

public:
   BinaryTrie() : size(0) {
      root = newNode();
   }

   static void reserve(int N) {
      NODES.reserve(NUM_BITS * N + 1);
   }

   void insert(int x) {
      int cur = root;
      for (int j = NUM_BITS-1; j >= 0; --j) {
         int k = (x >> j) & 1;
         int nxt = NODES[cur].child[k];
         if (nxt < 0) {
            nxt = newNode();
            NODES[cur].child[k] = nxt;
         }
         cur = nxt;
      }
      ++size;
   }
   int get_max_xor(int x) {
      if (size == 0)
         return 0;
      int res = 0;
      int cur = root;
      for (int j = NUM_BITS-1; j >= 0; --j) {
         int k = ((x >> j) & 1) ^ 1;  // bit to try
         int nxt = NODES[cur].child[k];
         if (nxt < 0) {
            nxt = NODES[cur].child[k ^ 1];
         // assert(nxt >= 0);
         }
         else
            res |= 1<<j;
         cur = nxt;
      }
      return res;
   }
};

vector<BinaryTrie::BinaryTrieNode> BinaryTrie::NODES;


class SegmentTree {
   int N;
   vector<BinaryTrie> tree;
   void insert(int pos, int x, int id, int L, int R) {
      if (pos < L || pos > R) return;
      tree[id].insert(x);
      if (L == R)
         return;
      int mid = L + (R-L)/2;
      insert(pos, x, id*2, L, mid);
      insert(pos, x, id*2+1, mid+1, R);
   }
   int query(int p, int q, int x, int id, int L, int R) {
      if (q < L || p > R) return 0;
      if (p <= L && R <= q)
         return tree[id].get_max_xor(x);

      const int mid = L + (R-L)/2;
      return max( query(p, q, x, id*2, L, mid),
                  query(p, q, x, id*2+1, mid+1, R) );
   }
public:
   SegmentTree(int _N) : N(_N) {
      tree.resize(4*_N+100);
   }
   void insert(int pos, int x) {
      insert(pos, x, 1, 0, N-1);
   }
   int query(int p, int q, int x) {
      return query(p, q, x, 1, 0, N-1);
   }
};



struct Operation {
   char type;
   int param1, param2;
};


struct Edge {
   int to, weight;
};


#define MAXN 200001
int N;
vector< vector<Edge> > adj;

int xorsum_to_root[MAXN];
int dfs_start[MAXN], dfs_end[MAXN];
int dfs_time;
void dfs1(int u, int x = 0) {
   xorsum_to_root[u] = x;
   dfs_start[u] = ++dfs_time;
   for (Edge e : adj[u])
      dfs1(e.to, x ^ e.weight);
   dfs_end[u] = dfs_time;
}


int main(int argc, char* argv[]) {
   int Q;
   scanf("%d", &Q);

   vector<Operation> operations;
   REP(q, Q) {
      char oper[6];
      int param1, param2;
      scanf("%s %d %d", oper, &param1, &param2);
      operations.push_back({*oper, param1, param2});
   }

   adj.push_back( vector<Edge>() );
   for (Operation op : operations) {
      if (op.type == 'A') {
         int p = op.param1-1;
         int w = op.param2;
         int v = adj.size();
         adj.push_back( vector<Edge>() );
         adj[p].push_back({v, w});
      }
   }
   
   N = adj.size();
   
   dfs_time = -1;
   dfs1(0);

   adj.clear();

   //BinaryTrie::reserve(N);

   SegmentTree segm_tree(N);
   segm_tree.insert( dfs_start[0], xorsum_to_root[0] );

   int NN = 1;
   for (Operation op : operations) {
      if (op.type == 'A') {
         int v = NN++;
         segm_tree.insert( dfs_start[v], xorsum_to_root[v] );
      }
      else {
         int u = op.param1-1, v = op.param2-1;
         int res = segm_tree.query( dfs_start[v], dfs_end[v],
                                    xorsum_to_root[u] );
         printf("%d\n", res);
      }
   }

// fprintf(stderr, "nodes = %d\n", SZ(BinaryTrie::NODES));

// sleep(10);

   return 0;
}

Compilation message

klasika.cpp: In function 'int main(int, char**)':
klasika.cpp:157:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d", &Q);
    ~~~~~^~~~~~~~~~
klasika.cpp:163:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%s %d %d", oper, &param1, &param2);
       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 2 ms 632 KB Output is correct
3 Correct 3 ms 764 KB Output is correct
4 Correct 3 ms 1012 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 3 ms 760 KB Output is correct
8 Correct 3 ms 1012 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 3 ms 760 KB Output is correct
11 Correct 3 ms 760 KB Output is correct
12 Correct 3 ms 1012 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 2 ms 632 KB Output is correct
3 Correct 3 ms 764 KB Output is correct
4 Correct 3 ms 1012 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 3 ms 760 KB Output is correct
8 Correct 3 ms 1012 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 3 ms 760 KB Output is correct
11 Correct 3 ms 760 KB Output is correct
12 Correct 3 ms 1012 KB Output is correct
13 Correct 7 ms 1520 KB Output is correct
14 Correct 9 ms 2704 KB Output is correct
15 Correct 12 ms 4836 KB Output is correct
16 Correct 12 ms 4836 KB Output is correct
17 Correct 6 ms 1648 KB Output is correct
18 Correct 8 ms 2704 KB Output is correct
19 Correct 11 ms 4708 KB Output is correct
20 Correct 13 ms 4708 KB Output is correct
21 Correct 7 ms 1648 KB Output is correct
22 Correct 9 ms 2704 KB Output is correct
23 Correct 12 ms 4680 KB Output is correct
24 Correct 12 ms 4708 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 565 ms 144416 KB Output is correct
2 Correct 992 ms 280308 KB Output is correct
3 Runtime error 1191 ms 524288 KB Execution killed with signal 9 (could be triggered by violating memory limits)
4 Halted 0 ms 0 KB -

Subtask #4
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 504 KB Output is correct
2 Correct 2 ms 632 KB Output is correct
3 Correct 3 ms 764 KB Output is correct
4 Correct 3 ms 1012 KB Output is correct
5 Correct 2 ms 504 KB Output is correct
6 Correct 2 ms 604 KB Output is correct
7 Correct 3 ms 760 KB Output is correct
8 Correct 3 ms 1012 KB Output is correct
9 Correct 2 ms 504 KB Output is correct
10 Correct 3 ms 760 KB Output is correct
11 Correct 3 ms 760 KB Output is correct
12 Correct 3 ms 1012 KB Output is correct
13 Correct 7 ms 1520 KB Output is correct
14 Correct 9 ms 2704 KB Output is correct
15 Correct 12 ms 4836 KB Output is correct
16 Correct 12 ms 4836 KB Output is correct
17 Correct 6 ms 1648 KB Output is correct
18 Correct 8 ms 2704 KB Output is correct
19 Correct 11 ms 4708 KB Output is correct
20 Correct 13 ms 4708 KB Output is correct
21 Correct 7 ms 1648 KB Output is correct
22 Correct 9 ms 2704 KB Output is correct
23 Correct 12 ms 4680 KB Output is correct
24 Correct 12 ms 4708 KB Output is correct
25 Correct 565 ms 144416 KB Output is correct
26 Correct 992 ms 280308 KB Output is correct
27 Runtime error 1191 ms 524288 KB Execution killed with signal 9 (could be triggered by violating memory limits)
28 Halted 0 ms 0 KB -