# GJ 輸入練習
~~其實你們應該要會了才對~~
---
a036 一行版
http://tcgs.tc.edu.tw:1218/ShowProblem?problemid=a036
----
```cpp
int a,b;
cin >> a >> b;
if(a>b){
cout << "A " << a-b;
}else if(a<b){
cout << "B " << b-a;
}else{
cout << 0;
}
```
---
a037 N行版
http://tcgs.tc.edu.tw:1218/ShowProblem?problemid=a037
----
```cpp
int n;
cin >> n;
for(int i = 0;i < n;i++){
int a,b;
cin >> a >> b;
if(a>b){
cout << "A " << a-b << "\n";
}else if(a<b){
cout << "B " << b-a << "\n";
}else{
cout << 0 << "\n";
}
}
```
---
a038 0尾版
http://tcgs.tc.edu.tw:1218/ShowProblem?problemid=a038
----
```cpp
while(true){
int a,b;
cin >> a >> b;
if(!a&&!b)break;
if(a>b){
cout << "A " << a-b << "\n";
}else if(a<b){
cout << "B " << b-a << "\n";
}else{
cout << 0 << "\n";
}
}
```
---
a039 EOF版
http://tcgs.tc.edu.tw:1218/ShowProblem?problemid=a039
----
```cpp
int a,b;
while(cin >> a >> b){
if(a>b){
cout << "A " << a-b << "\n";
}else if(a<b){
cout << "B " << b-a << "\n";
}else{
cout << 0 << "\n";
}
}
```
---
a040 Case版
http://tcgs.tc.edu.tw:1218/ShowProblem?problemid=a040
----
```cpp
int n;
cin >> n;
for(int i = 1;i <= n;i++){
int a,b;
cin >> a >> b;
cout << "Case " << i << ": ";
if(a>b){
cout << "A " << a-b << "\n";
}else if(a<b){
cout << "B " << b-a << "\n";
}else{
cout << 0 << "\n";
}
}
```
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