Submission #839653

#	Time	Username	Problem	Language	Result	Execution time	Memory
839653		sleepntsheep	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include <cassert>
#include <string>
#include <vector>
using namespace std;

string guess_sequence(int N)
{
    string S, opt;
    int fst = -1, C = 0;
    int non[2005][4] = {0};

    for (int i = 0; i < 4 && !j; ++i)
    {
        for (int j = 0; opt.empty() && j < 4; ++j) {
            if (press("A")) opt="BXY", S="A";
            else if (press("B")) opt="AXY", S="B";
            else if (press("X")) opt="ABY", S="X";
            else if (press("Y")) opt="ABX", S="Y";
        }
    }

    for (int i = 1; i < N - 1; ++i)
    {
        string ask = S + opt[0] + opt[0] + S + opt[0] + opt[1] + S + opt[0] + opt[2]  + S + opt[1];
        int k = press(ask);
        if (k == i + 2) S += opt[0];
        else if (k == i + 1) S += opt[1];
        else S += opt[2];
    }

    if (press(S+opt[0])==N) S+=opt[0];
    if (press(S+opt[1])==N) S+=opt[1];
    if (press(S+opt[2])==N) S+=opt[2];

    return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:13:31: error: 'j' was not declared in this scope
   13 |     for (int i = 0; i < 4 && !j; ++i)
      |                               ^
combo.cpp:10:9: warning: unused variable 'fst' [-Wunused-variable]
   10 |     int fst = -1, C = 0;
      |         ^~~
combo.cpp:10:19: warning: unused variable 'C' [-Wunused-variable]
   10 |     int fst = -1, C = 0;
      |                   ^
combo.cpp:11:9: warning: unused variable 'non' [-Wunused-variable]
   11 |     int non[2005][4] = {0};
      |         ^~~