题解 | #数组中重复的数字#
数组中重复的数字
https://www.nowcoder.com/practice/6fe361ede7e54db1b84adc81d09d8524
int duplicate(int* numbers, int numbersLen ) {
int a[10001] = {};
for(int i = 0; i < numbersLen; ++i){
a[numbers[i]]++;
}
for(int i = 0; i< numbersLen; ++i){
if(a[i] >= 2){
return i;
}
}
return -1;
}
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