Submission #1006750

#	Time	Username	Problem	Language	Result	Execution time	Memory
1006750		devariaota	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
using namespace std;

string guess_sequence(int N) {
  string S = "";
  char a;
  string p = "AB";
  int coins = press(p);
  if(coins){
    p = "A";
    coins = press(p);
    if(coins) a = 'A';
    else a = 'B';
  }
  else{
    p = "X";
    coins = press(p);
    if(coins) a = 'X';
    else a = 'Y';
  }
  S += a;
  vector <char> v;
  if(a != 'A') v += 'A';
  if(a != 'B') v += 'B';
  if(a != 'X') v += 'X';
  if(a != 'Y') v += 'Y';
  for(int i = 0; i < N-2; i++){
    int t = 0;
    p = "";
    for(int j = 0; j < 3; j++){
      if(j == 0){
        for(auto y : v) p += S + v[j] + y;
      }
      if(j == 1) p += S + v[j];
    }
    coins = press(p);
    if(coins == 2) S += v[0];
    else if(coins == 1) S += v[1];
    else S += v[2];
  }
  coins = press(p);
  p = S + v[0] + S + v[1];
  if(coins == N){
    p = S + v[0]
    coins = press(p);
    if(coins == N) S += v[0];
    else S += v[1];
  }
  else S += v[2];
  return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:22:3: error: 'vector' was not declared in this scope
   22 |   vector <char> v;
      |   ^~~~~~
combo.cpp:2:1: note: 'std::vector' is defined in header '<vector>'; did you forget to '#include <vector>'?
    1 | #include "combo.h"
  +++ |+#include <vector>
    2 | using namespace std;
combo.cpp:22:11: error: expected primary-expression before 'char'
   22 |   vector <char> v;
      |           ^~~~
combo.cpp:23:16: error: 'v' was not declared in this scope
   23 |   if(a != 'A') v += 'A';
      |                ^
combo.cpp:24:16: error: 'v' was not declared in this scope
   24 |   if(a != 'B') v += 'B';
      |                ^
combo.cpp:25:16: error: 'v' was not declared in this scope
   25 |   if(a != 'X') v += 'X';
      |                ^
combo.cpp:26:16: error: 'v' was not declared in this scope
   26 |   if(a != 'Y') v += 'Y';
      |                ^
combo.cpp:32:22: error: 'v' was not declared in this scope
   32 |         for(auto y : v) p += S + v[j] + y;
      |                      ^
combo.cpp:34:27: error: 'v' was not declared in this scope
   34 |       if(j == 1) p += S + v[j];
      |                           ^
combo.cpp:37:25: error: 'v' was not declared in this scope
   37 |     if(coins == 2) S += v[0];
      |                         ^
combo.cpp:38:30: error: 'v' was not declared in this scope
   38 |     else if(coins == 1) S += v[1];
      |                              ^
combo.cpp:39:15: error: 'v' was not declared in this scope
   39 |     else S += v[2];
      |               ^
combo.cpp:28:9: warning: unused variable 't' [-Wunused-variable]
   28 |     int t = 0;
      |         ^
combo.cpp:42:11: error: 'v' was not declared in this scope
   42 |   p = S + v[0] + S + v[1];
      |           ^