Submission #152754

#	Time	Username	Problem	Language	Result	Execution time	Memory
152754		Segtree	Combo (IOI18_combo)	C++14	97 / 100	37 ms	624 KiB

combo

#include<iostream>
#include<algorithm>
#include<vector>
using namespace std;
typedef long long ll;
#define mod 1000000007

int press(string p);

string guess_sequence(int N){
    string d="ABXY";
    string s="Y";
    for(int r=0;r<3;r++){
	string p=""; p+=d[r];
	if(press(p)==1)s=p;
    }
    char fi=s[0];
    string u="";
    for(int r=0;r<4;r++){
	if(d[r]!=fi)u+=d[r];
    }
    ll i=1;
    for(;i<N-1;){
	string p;
	p=s+u[0]+u[0]+fi+s+u[0]+u[1]+fi+s+u[1]+u[0];
	int res=press(p);
	if(res==s.size()+0){
	    s+=u[2];
	    i++;
	    continue;
	}
	if(res==s.size()+1){
	    p=s+u[1]+u[1];
	    int tap=press(p);
	    if(tap==s.size()+0)s=s+u[0]+u[2];
	    if(tap==s.size()+1)s=s+u[1]+u[2];
	    if(tap==s.size()+2)s=s+u[1]+u[1];
	    i+=2;
	    continue;
	}
	if(res==s.size()+2){
	    p=s+u[0]+u[0];
	    int tap=press(p);
	    if(tap==s.size()+0)s=s+u[1]+u[0];
	    if(tap==s.size()+1)s=s+u[0]+u[1];
	    if(tap==s.size()+2)s=s+u[0]+u[0];
	    i+=2;
	}
    }
    if(i==N-1){
	char res=u[2];
	for(int i=0;i<2;i++){
	    string p=s+u[i];
	    if(press(p)==N)res=u[i];
	}
	s+=res;
    }
    return s;
};
/*
int main(){
  
  return 0;
}*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:27:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |  if(res==s.size()+0){
      |     ~~~^~~~~~~~~~~~
combo.cpp:32:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  if(res==s.size()+1){
      |     ~~~^~~~~~~~~~~~
combo.cpp:35:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |      if(tap==s.size()+0)s=s+u[0]+u[2];
      |         ~~~^~~~~~~~~~~~
combo.cpp:36:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |      if(tap==s.size()+1)s=s+u[1]+u[2];
      |         ~~~^~~~~~~~~~~~
combo.cpp:37:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |      if(tap==s.size()+2)s=s+u[1]+u[1];
      |         ~~~^~~~~~~~~~~~
combo.cpp:41:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |  if(res==s.size()+2){
      |     ~~~^~~~~~~~~~~~
combo.cpp:44:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |      if(tap==s.size()+0)s=s+u[1]+u[0];
      |         ~~~^~~~~~~~~~~~
combo.cpp:45:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |      if(tap==s.size()+1)s=s+u[0]+u[1];
      |         ~~~^~~~~~~~~~~~
combo.cpp:46:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |      if(tap==s.size()+2)s=s+u[0]+u[0];
      |         ~~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 92 / 95