题解 | #完全数计算#
找出字符串中第一个只出现一次的字符
http://www.nowcoder.com/practice/e896d0f82f1246a3aa7b232ce38029d4
const referMap = {};
const inputArr = readline().split("");
const outputArr = [];
inputArr.forEach((e)=>{
if(e in referMap){
referMap[e] +=1;
}
else{
referMap[e] = 1;
}
})
for(let i in referMap){
if(referMap[i]==1){
outputArr.push(i);
}
}
if(outputArr.length>=1){
console.log(outputArr[0]);
}
else{
console.log(-1);
}
const inputArr = readline().split("");
const outputArr = [];
inputArr.forEach((e)=>{
if(e in referMap){
referMap[e] +=1;
}
else{
referMap[e] = 1;
}
})
for(let i in referMap){
if(referMap[i]==1){
outputArr.push(i);
}
}
if(outputArr.length>=1){
console.log(outputArr[0]);
}
else{
console.log(-1);
}
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