牛客網(wǎng)在線判題系統(tǒng)使用幫助
熟悉目標OJ非常重要，才能保證你做對的代碼運行成功，下面看牛客網(wǎng)OJ：
一、正確處理輸入格式：
| 常見的輸入格式 | 應對方法 |
|---|---|
| 預先不輸入數(shù)據(jù)的組數(shù) | 讀到文件結(jié)尾 |
| 預先輸入數(shù)據(jù)的組數(shù) | 先讀出組數(shù)，然后循環(huán) |
| 只有一組數(shù)據(jù) | 直接讀 |
1. 沒有組數(shù)
Scanner scanner = new Scanner(System.in);
While(scanner.hasNextInt()){
int a = scanner.nextInt();
int b = scanner.nextInt();
System.out.println(a+b);
}
2. 組數(shù) + 循環(huán)輸入
Scanner scanner = new Scanner(System.in);
int n = scanner.nextInt();
for(int i = 0; i < n; i++){
int a = scanner.nextInt();
int b = scanner.nextInt();
System.out.println(a+b);
}
3. 直接讀
int a = scanner.nextInt();
int b = scanner.nextInt();
System.out.println(a+b);
二、正確處理輸入格式：
| 看具體要求 |
|---|
| 不要輸出Case數(shù) |
| 要輸出case數(shù) |
| 每個case之后有空行 |
| 兩個case之間有空行 |
1. 不要輸出Case數(shù)
Scanner scanner = new Scanner(System.in);
int n = scanner.nextInt();
for(int i = 0; i < n; i++){
int a = scanner.nextInt();
int b = scanner.nextInt();
System.out.println(a+b);
}
2. 要輸出Case數(shù)
Scanner scanner = new Scanner(System.in);
int n = scanner.nextInt();
for(int i = 0; i < n; i++){
int a = scanner.nextInt();
int b = scanner.nextInt();
System.out.println(“case”+ (i+1)+ “ ”+ (a+b));
}
3. 每個case之后有空行
Scanner scanner = new Scanner(System.in);
int n = scanner.nextInt();
for(int i = 0; i < n; i++){
int a = scanner.nextInt();
int b = scanner.nextInt();
System.out.println(“case”+ (i+1)+ “ ”+ (a+b)+"\n");
}
4. 兩個case之間有空行
Scanner scanner = new Scanner(System.in);
int n = scanner.nextInt();
for(int i = 0; i < n; i++){
int a = scanner.nextInt();
int b = scanner.nextInt();
if(i > 0){
System.out.println(“\n”);
}
System.out.println(“case”+ (i+1)+ “ ”+ (a+b));
}
處理細節(jié)和技巧
處理細節(jié)和技巧-輸入
處理細節(jié)和技巧-輸出
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