Submission #84827

#	Time	Username	Problem	Language	Result	Execution time	Memory
84827		SirCeness	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>

using namespace std;

string guess_sequence(int N) {
	
	string head = "";
	string str = "";
	str = "AB";
	if (press(str)){
		str = "A";
		if (press(str)){
			head = "A";
		} else head = "B";
	} else {
		str = "X";
		if (press(str)){
			head = "X";
		} else head = "Y";
	}
	
	char a, b, c;
	if (head[0] == 'A'){
		a = 'B';
		b = 'X';
		c = 'Y';
	} else if (head[0] == 'B'){
		a = 'A';
		b = 'X';
		c = 'Y';
	} else if (head[0] == 'X'){
		a = 'B';
		b = 'A';
		c = 'Y';
	} else if (head[0] == 'Y'){
		a = 'B';
		b = 'X';
		c = 'A';
	}
	
	for (int i = 0; i < N-2; i++){
		str = "";
		str += head;
		str += a;
		str += a;
		str += head
		str += a;
		str += b;
		str += head 
		str += a;
		str += c;
		str += head;
		str += b;
		
		int size = head.size();
		int coins = press(str);
		if (coins == size+2) head += a;
		else if (coins == size+1) head += b;
		else if (coins == size) head += c;
		
	}
	
	str = "";
	str += head;
	str += a;
	str += head;
	str += b;
	
	if (press(str) == head.size()){
		head += c;
	} else {
		str = head + a;
		if (press(str) == head.size()) head += b;
		else head += a;
	}
	
	return head;
}

/*
	string p = "";
	for (int i = 0; i < 4 * N; ++i) {
		p += 'A';
	}
	int coins = press(p);
	string S = "";
	for (int i = 0; i < N; ++i) {
		S += 'A';
	}
	return S;
*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:47:14: error: expected ';' before 'str'
   47 |   str += head
      |              ^
      |              ;
   48 |   str += a;
      |   ~~~         
combo.cpp:50:14: error: expected ';' before 'str'
   50 |   str += head
      |              ^
      |              ;
   51 |   str += a;
      |   ~~~         
combo.cpp:70:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |  if (press(str) == head.size()){
      |      ~~~~~~~~~~~^~~~~~~~~~~~~~
combo.cpp:74:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |   if (press(str) == head.size()) head += b;
      |       ~~~~~~~~~~~^~~~~~~~~~~~~~