Submission #368197

#	Time	Username	Problem	Language	Result	Execution time	Memory
368197		Ozy	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for (int i = (a); i <= (b); i++)
#define lli long long int
#define debug(a) cout << #a << " = " << a << endl

string res,p;
lli a;
char arr[4];

void llena(lli tam) {

    rep(i,1,tam) p += res[i];
    res += arr[1]+ arr[1];

    rep(i,1,tam) p += res[i];
    res += arr[1]+ arr[2];

    rep(i,1,tam) p += res[i];
    res += arr[1]+ arr[3];

    rep(i,1,tam) p += res[i];
    res += arr[2];
}

string guess_sequence(int N) {

    a = press("AB");
    if (a > 0){
       a = press("A");
       if (a == 1) res = "A";
       else res = "B";
    }
    else {
       a = press("X");
       if (a == 1) res = "X";
       else res = "Y";
    }

    if (res == "A") arr = {' ','B','X','Y'};
    else if (res == "B") arr = {' ','A','X','Y'};
    else if (res == "X") arr = {' ','A','B','Y'};
    else arr = {' ','A','B','X'};

    rep(i,2,n-1) {
        p = "";
        llena(i-1);
        a = press(p);

        if (a > i) res += arr[1];
        else if (a == i) res += arr[2];
        else res += arr[3];
    }

    p = res;
    p += arr[1];

    a = press(p);
    if (a == n) {
        res += arr[1];
        return res;
    }
    else {
        p = res;
        p += arr[2];
        if (a == n) {
            res += arr[2];
            return res;
        }
        else {
            res += arr[3];
            return res;
        }
    }
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:41:25: error: assigning to an array from an initializer list
   41 |     if (res == "A") arr = {' ','B','X','Y'};
      |                     ~~~~^~~~~~~~~~~~~~~~~~~
combo.cpp:42:30: error: assigning to an array from an initializer list
   42 |     else if (res == "B") arr = {' ','A','X','Y'};
      |                          ~~~~^~~~~~~~~~~~~~~~~~~
combo.cpp:43:30: error: assigning to an array from an initializer list
   43 |     else if (res == "X") arr = {' ','A','B','Y'};
      |                          ~~~~^~~~~~~~~~~~~~~~~~~
combo.cpp:44:14: error: assigning to an array from an initializer list
   44 |     else arr = {' ','A','B','X'};
      |          ~~~~^~~~~~~~~~~~~~~~~~~
combo.cpp:46:13: error: 'n' was not declared in this scope
   46 |     rep(i,2,n-1) {
      |             ^
combo.cpp:4:44: note: in definition of macro 'rep'
    4 | #define rep(i,a,b) for (int i = (a); i <= (b); i++)
      |                                            ^
combo.cpp:60:14: error: 'n' was not declared in this scope
   60 |     if (a == n) {
      |              ^