Submission #696451

#	Time	Username	Problem	Language	Result	Execution time	Memory
696451		Elvin_Fritl	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
using namespace std;
string guess_sequence(int n) {
    string p = "";
    string s="ABXY";
    for(int i=0;i<3;i++){
        string p1+=s[i];
        if(press(p1)==1){
            p=p1;
            break;
        }
    }
    if(p.size()==0){
        p+=s[3];
    }
    string s2="";
    for(int i=0;i<3;i++){
        if(p[0]!=s[i]){
            s2+=s[i];
        }
    }
    s=s2;
    for(int i=1;i<n;i++){
        for(int j=0;j<2;j++){
        string p1=p+s[j];
        if(press(p1)==p1.size()){
            p=p1;
            break;
        }
    }
    int kk=i;
    if(p.size()==kk){
        p+=s[2];
    }
    }
    return p;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:7:18: error: expected initializer before '+=' token
    7 |         string p1+=s[i];
      |                  ^~
combo.cpp:8:18: error: 'p1' was not declared in this scope; did you mean 'p'?
    8 |         if(press(p1)==1){
      |                  ^~
      |                  p
combo.cpp:26:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |         if(press(p1)==p1.size()){
      |            ~~~~~~~~~^~~~~~~~~~~
combo.cpp:32:16: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   32 |     if(p.size()==kk){
      |        ~~~~~~~~^~~~