Submission #1105380

#	Time	Username	Problem	Language	Result	Execution time	Memory
1105380		lkateris	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include <iostream>
#include <string>
#include "combo.h"

using namespace std;

string guess_sequence(int N) {
    string S = "";
    string s1 = "";
    string s2 = "";
    string s3 = "";
    string s4 = "";
    if (press("AB") > 0) {
        if (press("B") > 0) {
            S[0] = 'B';
            s1 = "XA";
        }
        else {
            S[0] = 'A';
            s1 = "XB";
        }
        s2 = "XY";
        s3 = "XX";
        s4 = "Y";
    }
    else {
        if ((press("X") > 0) {
            S[0] = 'X'; 
            s1 = "AY";
        }
        else {
            S[0] = 'Y';
            s1 = "AX";
        }
        s2 = "AB";
        s3 = "AA";
        s4 = "B";
    }
    int cnt = 1;
    for(int i=1;i<N-1;++i) {
        int c = press(S + s1 + S + s2 + S + s3 + S + s4);
        if (c - cnt == 2) S += s1[0];
        else if (c - cnt == 1) S += s4[0];
        cnt++;
    }
    if (press(S + 'A' + S + 'B') > cnt) {
        if (press(S + 'A') > cnt) {
            S += 'A';
            return S;
        }
        else {
            S += 'B';
            return S;
        }
        
    }
    else {
        if ((press(S + "X") > cnt) {
            S += 'X';
            return S;
        }
        else {
            S += 'Y';
            return S;
        }
    }
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:27:29: error: expected ';' before '{' token
   27 |         if ((press("X") > 0) {
      |                             ^~
      |                             ;
combo.cpp:31:9: error: expected primary-expression before 'else'
   31 |         else {
      |         ^~~~
combo.cpp:30:10: error: expected ')' before 'else'
   30 |         }
      |          ^
      |          )
   31 |         else {
      |         ~~~~
combo.cpp:27:12: note: to match this '('
   27 |         if ((press("X") > 0) {
      |            ^
combo.cpp:58:35: error: expected ')' before '{' token
   58 |         if ((press(S + "X") > cnt) {
      |            ~                      ^~
      |                                   )
combo.cpp:66:5: error: expected primary-expression before '}' token
   66 |     }
      |     ^
combo.cpp:9:17: warning: control reaches end of non-void function [-Wreturn-type]
    9 |     string s1 = "";
      |                 ^~