oj.uz

Submission #132002

# Submission time Handle Problem Language Result Execution time Memory
132002 2019-07-18T07:32:46 Z dvdg6566 Combo (IOI18_combo) C++14
0 / 100
 2 ms 456 KB 
#include "combo.h"
#include<bits/stdc++.h>
using namespace std;
#define pb emplace_back
#define mp make_pair
#define ALL(x) x.begin(), x.end()
#define SZ(x) (int)x.size()

char ltrs[] = {'A', 'B', 'X', 'Y'};
vector<char> res;

string guess_sequence(int N) {
  // cres<<N<<'\n';
  int a = press("AB");
  int b = press("AX");
  int x;
  if(a&&b)res.pb('A');
  if (a&&!b)res.pb('B');
  if (!a&&b)res.pb('X');
  if(!a&&!b)res.pb('Y');
  vector<char> V;
  for (int i=0;i<4;++i)if(ltrs[i] != res[0])V.pb(ltrs[i]);

  for (x=2;x<N;++x){
    string q = "";
    for (auto i : res)q+=i;
    q += V[0];
    q += V[0];
    for (auto i : res)q+=i;
    q += V[0];
    q += V[1];
    for (auto i : res)q+=i;
    q += V[0];
    q += V[2];
    for (auto i : res)q+=i;
    q += V[1];
    assert(SZ(q) <= 4*N);
    for (auto i : q)assert(i=='A'||i=='B'||i=='X'||i=='Y');
    // cres<<q<<'\n';4
    int r = press(q);
    // cres<<res<<' '<<x<<'\n';
    if (r == x-1){
      res.pb(V[2]);
    }else if (r == x+1){
      res.pb(V[0]);
    }else{
      res.pb(V[1]);
    }
  }
  assert(x<N);
  string ret = "";
  for (auto i : res)ret += i;
  ret += V[0];
  if (press(ret) == N)return ret;
  ret = "";
  for (auto i : res)ret += i;
  ret += V[1];
  if (press(ret) == N)return ret;
  ret = "";
  for (auto i : res)ret += i;
  ret += V[2];
  if (press(ret) == N)return ret;
  assert(0);
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 416 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -

Subtask #2
0 / 95.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 456 KB Execution killed with signal 6
2 Halted 0 ms 0 KB -