leetcode 数位和相等数对的最大和，为什么我这么写不对呢？

Question

这个是题目，
这个是我不通过的测试用例：nums =
[368,369,307,304,384,138,90,279,35,396,114,328,251,364,300,191,438,467,183]
下面是我的代码：

#define _CRT_SECURE_NO_WARNINGS#include <stdio.h>#include <stdlib.h>int sumNumber(int num) {    int digit;//用于保存每个位数的数字    int sum = 0;//用于记录每个位数的和    while (num != 0) {        digit = num % 10;        sum += digit;        num /= 10;    }    return sum;}int maxNum(int* mid) {    int i = 0, h = 0, max;    int length = 0;//记录数组长度    length = sizeof(mid) / sizeof(mid[0]);    printf("\n");    printf("length = %d\n", h);    if (mid[0] == 0)        max = -1;    if (mid[0] !=0 && mid[1] == 0)        max = mid[0];    /*if (mid[0] != 0 && mid[1] != 0) {        max = mid[0];        for (i = 1; i < m; i++) {            if (mid[i] > max)                max = mid[i];        }    }    */    return max;}int maxNumber(int x, int y) {    return x > y ? x : y;}int maximumSum(int* nums, int numsSize) {    int i = 0, j = 0, h = 0, test = 0, max = 0;    int hashTable[100000] = { 0 };    int find = 0;    int* res = (int*)calloc(numsSize, sizeof(int));    for (i = 0; i < numsSize; i++) {        res[i] = sumNumber(nums[i]);    }    for (i = 0; i < numsSize; i++) {        printf("res[i] = %d  ",res[i]);    }    printf("\n");    /*for (i = 0; i < numsSize; i++) {        for (j = i + 1; j < numsSize; j++) {            if (res[i] == res[j]) {                test = nums[i] + nums[j];                if (test > max)                    max = test;            }        }    }*/    for (i = 0; i < numsSize; i++) {        if (hashTable[res[i]] == 0)            hashTable[res[i]] = nums[i];        else {            hashTable[res[i]] += nums[i];            max = maxNumber(max, hashTable[res[i]]);        }    }    printf("hast18 = %d", hashTable[18]);    //maxNum(hashTable);    if (max == 0)        return -1;    return max;}int main() {    int find = 0;    int nums[19] = { 368,369,307,304,384,138,90,279,35,396,114,328,251,364,300,191,438,467,183 };    find = maximumSum(nums, 19);    printf("  find = %d ", find);}

我运行上面的测试用例后，得到的结果是1044，我感觉没错啊，上面数组中的369,279,396的数位和是18，他们相加的结果是1044，而正确答案是835，即368,438的加和为835。

但是我这样写代码就行，最后运行的结果就是835，求大佬解答。

int sumNumber(int num) {    int digit;//用于保存每个位数的数字    int sum = 0;//用于记录每个位数的和    while (num != 0) {        digit = num % 10;        sum += digit;        num /= 10;    }    return sum;}int maximumSum(int* nums, int numsSize) {    int i = 0, j = 0, h = 0, test = 0, max = 0;    int* res = (int*)calloc(numsSize, sizeof(int));    for (i = 0; i < numsSize; i++) {        res[i] = sumNumber(nums[i]);    }    for (i = 0; i < numsSize; i++) {        printf("res[i] = %d  ", res[i]);    }    printf("\n");    for (i = 0; i < numsSize; i++) {        for (j = i + 1; j < numsSize; j++) {            if (res[i] == res[j]) {                test = nums[i] + nums[j];                printf("test : %d，res[i] = %d\n",test,res[i]);                if (test > max)                    max = test;            }        }    }    if (max == 0)        return -1;    return max;}

Answer 1

题目要求选出两个下标求和，问和的最大值。你那个是三个，不是两个。