凡事预则立，不预则废。

练习地址

A + B (1)

while(line = readline()){
    let lines = line.split(' ');
    let a = parseInt(lines[0]);
    let b = parseInt(lines[1]);
    print(a+b);
}

A + B (2)

let len = readline();
while(len--){
    let lines = readline().split(' ');
    let a = parseInt(lines[0]);
    let b = parseInt(lines[1]);
    print(a+b);
}

A + B (3)

while(line = readline()){
    let lines = line.split(' ');
    let a = parseInt(lines[0]);
    let b = parseInt(lines[1]);
    if(a===0 && b===0) break;
    print(a+b);
}

A + B (4)

while(line = readline()){
    let lines = line.split(' ');
    let len = parseInt(lines[0]);
    if(len === 0) break;
    let res = 0;
    for(let i=1;i<=len;++i){
        res += parseInt(lines[i]);
    }
    print(res);
}

A + B (5)

let len = readline();
while(len--){
    let lines = readline().split(' ');
    let end = parseInt(lines[0]);
    let res = 0;
    for(let i=1;i<=end;++i){
        res += parseInt(lines[i]);
    }
    print(res);
}

A + B (6)

while(line = readline()){
    let lines = line.split(' ');
    let len = (lines[0]);
    let sum = 0;
    while(len--){
        sum += parseInt(lines[len+1]);
    }
    print(sum);
}

A + B (7)

while(line = readline()){
    lines = line.split(' ');
    if(parseInt(lines[0])===0){
        print(0);
        break;
    }
    let sum = 0;
    for(let i=0;i<lines.length;++i){
        sum += parseInt(lines[i]);
    }
    print(sum);
}

字符串排序（1）

let len = readline();
let arr = readline().split(' ');
print(arr.sort().join(' '));

字符串排序（2）

while(line = readline()){
    lines = line.split(' ');
    print(lines.sort().join(' '));
}

字符串排序（3）

while(line = readline()){
    lines = line.split(',');
    print(lines.sort().join(','));
}