Submission #670695

#	Time	Username	Problem	Language	Result	Execution time	Memory
670695		Essa2006	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include<bits/stdc++.h>
using namespace std;
#define ll long long 
#define endl '\n'
#define FF first
#define SS second
#define all(a) a.begin(), a.end()
#define mod (ll)(1000000007)
string s="XYYAA";
string ans="";
int press(string p);
int press(string p){
    int m=p.size();
    int mx=0, cur=0;
    for(int i=0;i<m;i++){
        if(cur<s.size() && p[i]==s[cur])
            cur++, mx=max(mx, cur);
        else
            cur=0;
    }
    return mx;
}
string guess_sequence(int n){
    string a="ABXY";    
    char c;
    if(press("AB")){
        if(press("A"))
            ans.push_back('A'), c='A';
        else
            ans.push_back('B'), c='B';
    }
    else{
        if(press("X"))
            ans.push_back('X'), c='X';
        else
            ans.push_back('Y'), c='Y';
    }
    string b=a;
    a="";
    for(int i=0;i<4;i++){
        if(b[i]!=c)
            a.push_back(b[i]);
    }
    c=a[0];
    bool include_it=0, h=1;
    for(int i=1;i<n;i++){
        if(h){
            for(int j=0;j<3;j++){
                string k=ans+a[j]+c;
                int pr=press(k);
                if(pr>=i+1){
                    ans.push_back(a[j]);
                    if(pr==i+1)
                        include_it=0;
                    else
                        include_it=1;
                    h=0;
                    break;
                }
            }
        }
        else{
            if(include_it){
                ans.push_back(c);
                h=1;
            }
            else{
                string k=ans+a[1]+c;
                int pr=press(k);
                if(pr>=i+1){
                    ans.push_back(a[1]);
                    if(pr==i+1)
                        include_it=0;
                    else
                        include_it=1;
                }
                else{
                    ans.push_back(a[2]);
                    h=1;
                }
            }
            
        }
    }
    return ans;
}
int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);
    int n=s.size();
    cout<<guess_sequence(n);
    
}

Compilation message (stderr)

combo.cpp: In function 'int press(std::string)':
combo.cpp:16:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         if(cur<s.size() && p[i]==s[cur])
      |            ~~~^~~~~~~~~
/usr/bin/ld: /tmp/cczTOknF.o: in function `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)':
grader.cpp:(.text+0x0): multiple definition of `press(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'; /tmp/cc7Orc7F.o:combo.cpp:(.text+0xc0): first defined here
/usr/bin/ld: /tmp/cczTOknF.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc7Orc7F.o:combo.cpp:(.text.startup+0xc0): first defined here
collect2: error: ld returned 1 exit status