[[problem:LECTURE]]

문제는 위에 첨부했어요;
런타임오류가 어디서 나는지 알수 있을까요?
참고로 오류의 종류는
RTE (SIGABRT: program aborted, probably assertion fail)
이거네요

~~~
#include
#include
#include

using namespace std;

int main()
{
int T,t,I,J,lenth,count=0;
string S;
vector print(1000,"0");
vector alpha;
static int k=0;
static int c=0;
string swap;

cin>>T;
t=T;
while(T)
{
    cin>>S;
    for(unsigned int i=0; i<S.length(); i++)
    {
        alpha.push_back(S.substr(I,1));
    }
    for(int M=0; M<4; M++)
    {
        alpha.push_back("0");
    }
    for(lenth=0; lenth<1000; lenth++)
    {
        if (alpha[lenth] =="0")
        {
            break;
        }
    }

    for(J=lenth/2; J>0; J--)
    {
        for(I=0;I<=J;I++)
        {
            if(alpha[c+I*2] > alpha[c+I*2+2])
            {
                if(alpha[c+I*2]=="0"||alpha[c+I*2+2]=="0")
                    break;
                swap = alpha[c+I*2];
                alpha[c+I*2] = alpha[c+I*2+2];
                alpha[c+I*2+2] = swap;
                swap=alpha[c+I*2+1];
                alpha[c+I*2+1]=alpha[c+I*2+2+1];
                alpha[c+I*2+2+1]=swap;
            }
        }
    }
    for(J=lenth/2; J>0; J--)
    {
        for(I=0;I<=J;I++)
        {
            if(alpha[c+I*2] >= alpha[c+I*2+2] && alpha[c+I*2+1] > alpha[c+I*2+2+1])
            {
                if(alpha[c+I*2+1]=="0"||alpha[c+I*2+2+1]=="0")
                    break;
                swap = alpha[c+I*2];
                alpha[c+I*2] = alpha[c+I*2+2];
                alpha[c+I*2+2] = swap;
                swap=alpha[c+I*2+1];
                alpha[c+I*2+1]=alpha[c+I*2+2+1];
                alpha[c+I*2+2+1]=swap;
            }
        }
    }
    for(I = 0; I<lenth; I++)
    {
        print[k] = alpha[k];
        k++;
    }
    print[k] = "0";
    k+=4;
    T--;
    c+=lenth+4;
}
for(I=0; I<k+4*t; I++)
{
    if(print[I] == "0")
    {
        cout<<"\n";
        I+=4;
        count++;
        if(count==t)
            break;
    }
    cout<<print[I];
}

}
~~~