Submission #671002

#	Time	Username	Problem	Language	Result	Execution time	Memory
671002		Arixcrest	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

string fillseq(string s,int sz){
	string temp = "";
	while(temp.size()<sz){
		temp+=s;
	}
	while(temp.size()>sz) temp.pop_back();
	return temp;
}
string guess_sequence(int n){
	n = 4*n;
	int mx = 0;
	string ans = "";
	int v;
	vector<char> vals = {'A','B','X','Y'};
	int cnt =0;
	while(mx!=n/4){
		cnt++;
		if(mx==0){
			string temp1 = fillseq("A",n/2);
			temp1+=fillseq("B",n/2);
			v = press(temp1);
			if(v>mx){
				temp1 = fillseq("A",n);
				v = press(temp1);
				if(v>mx){
					mx = v;
					ans+="A";
				}else{
					ans+="B";
				}
			}else{
				temp1 = fillseq("X",n);
				v = press(temp1);
				if(v>mx){
					mx = v;
					ans+='X';
				}else{
					mx = v;
					ans+="Y";
				}
			}
			for(auto it = vals.begin();it!=vals.end();it++){
				if(*it==ans.front()){
					vals.erase(it);
					break;
				}
			}
		}else{
			if(mx==n/4-1){
				string temp1 = ans+vals[0];
				while(temp1.size()<n) temp1+=(ans.front());
				v = press(temp1);
				if(v-mx==1){
					ans+=vals[0];
					break;
				}
				temp1 = ans+vals[1];
				while(temp1.size()<n) temp1+=(ans.front());
				v = press(temp1);
				if(v-mx==1){
					ans+=vals[1];
					break;
				}else{
					ans+=vals[2];
					break;
				}

			}
			else{
				string temp1 = ans+vals[0]+vals[0];
				temp1+=ans+vals[0]+vals[1];
				temp1+=ans+vals[0]+vals[2];
				temp1+=ans+vals[1];
				while(temp1.size()<n) temp1+=(ans.front());
				v = press(temp1);
				if(v-mx==2){
					ans+=vals[0];
				}else if(v-mx==1){
					ans+=vals[1];
				}else{
					ans+=(vals[2]);
				}
				mx++;
			}

		}
	}
	// cout<<cnt<<" "<<ans<<"\n";
	return ans;

}

Compilation message (stderr)

combo.cpp:1:1: error: 'string' does not name a type
    1 | string fillseq(string s,int sz){
      | ^~~~~~
combo.cpp:9:1: error: 'string' does not name a type
    9 | string guess_sequence(int n){
      | ^~~~~~