Merkkijono

input/code.cpp: In function 'std::string remove_sub(std::string, int*)':
input/code.cpp:12:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < str.length()-1; i++) {
                                   ^
input/code.cpp: At global scope:
input/code.cpp:27:1: warning: first argument of 'int main(char*, char**)' should be 'int' [-Wmain]
 main (char *argc, char **argv)
 ^

#include<iostream>
#include<string>

using namespace std;

string
remove_sub(string str, int *boo)
{
	char ch;
	int j;

	for (int i = 0; i < str.length()-1; i++) {
		if (str.at(i) == str.at(i+1)) {
			ch = str.at(i);
			for (j = i; str.at(j) == ch; j++) {

			}
			str.erase(i, j-i);
			return str;
		}	
	}
	*boo = 1;
	return str;
}

int
main (char *argc, char **argv)
{
	string str;

	getline(cin, str);
	for (int i = 0; !i; ) {
	str = remove_sub(str, &i);
	}
	cout << str << endl;
	return 0;

}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::at

Test 3

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::at

Test 4

Verdict: ACCEPTED

Test 5

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::at

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED