我在编译器上是可以通过样例的，但是在这里全部报的错误是RE，这是咋回事，哪里出了问题，大佬指点一下

#include <bits/stdc++.h>
using namespace std;

//unordered_map<char,char> mp;

int main()
{
    int n;
    scanf("%d",&n);
	getchar();
    vector<string> opnd;
    for(int i = 0;i < n;i++)
    {
        string s;
        getline(cin,s);
        opnd.push_back(s);
    }
    
    char ch;
    for(int i = 0;i < n;i++)
    {
        if(opnd[i][0] == 'a' || opnd[i][0] == 'b' || opnd[i][0] == 'c')
        {
            ch = opnd[i][0];
            int x,y;
            string str;
            for(int j = 2;j < opnd[i].size();j++)
            {
                if(opnd[i][j] == ' ')
                {
                    x = stoi(str);
                    str = "";
                    continue;
                }
                str += opnd[i][j];
            }
            y = stoi(str);
            if(ch == 'a')
            {
                cout << x << "+" << y << "=" << x+y << endl;
                cout << (int)log10(x)+(int)log10(y)+(int)log10(x+y)+5 << endl;
            }
            else if(ch == 'b'&&x>y)
            {
                cout << x << "-" << y << "=" << x-y << endl;
                cout << (int)log10(x)+(int)log10(y)+(int)log10(x-y)+5 << endl;
            }
			else if(ch == 'b'&&x<y)
			{
				cout << x << "-" << y << "=" << x-y << endl;
				cout << (int)log10(x)+(int)log10(y)+(int)log10(abs(x-y))+5+1 << endl;
			}
            else if(ch == 'c')
            {
                cout << x << "*" << y << "=" << x*y << endl;
                cout << (int)log10(x)+(int)log10(y)+(int)log10(x*y)+5 << endl;
            }
        }
        else
        {
            int x,y;
            string str;
            for(int j = 0;j < opnd[i].size();j++)
            {
                if(opnd[i][j] == ' ')
                {
                    x = stoi(str);
                    str = "";
                    continue;
                }
                str += opnd[i][j];
            }
            y = stoi(str);
            if(ch == 'a')
            {
                cout << x << "+" << y << "=" << x+y << endl;
                cout << (int)log10(x)+(int)log10(y)+(int)log10(x+y)+5 << endl;
            }
            else if(ch == 'b'&&x>y)
            {
                cout << x << "-" << y << "=" << x-y << endl;
                cout << (int)log10(x)+(int)log10(y)+(int)log10(x-y)+5 << endl;
            }
			else if(ch == 'b'&&x<y)
			{
				cout << x << "-" << y << "=" << x-y << endl;
				cout << (int)log10(x)+(int)log10(y)+(int)log10(abs(x-y))+5+1 << endl;
			}
            else if(ch == 'c')
            {
                cout << x << "*" << y << "=" << x*y << endl;
                cout << (int)log10(x)+(int)log10(y)+(int)log10(x*y)+5 << endl;
            }
        }
    }
    //system("pause");
    return 0;
}