問題
Each row of scores holds one student's test scores. Compute each student's average with a helper function and return the row index of the student with the highest average. If several tie, return the smallest index.
Implement top_student(scores).
Input
scores: One row of scores per student; every row has at least one score.
Output
Return the index of the top student.
制約
1 ≤ students ≤ 1,000; 1 ≤ scores per student ≤ 100; 0 ≤ score ≤ 100
例
例 1
入力：
scores = [
[80, 90],
[95, 85],
[70, 100]
]
期待される出力：
expected = 1入力：
std::vector<std::vector<long long>> scores = {
{80, 90},
{95, 85},
{70, 100}
};
期待される出力：
long long expected = 1;入力：
long[][] scores = new long[][] {
new long[] {80, 90},
new long[] {95, 85},
new long[] {70, 100}
};
期待される出力：
long expected = 1;解説
Averages are 85, 90 and 85, so student 1 has the highest average.
例 2
入力：
scores = [
[60],
[60, 60]
]
期待される出力：
expected = 0入力：
std::vector<std::vector<long long>> scores = {
{60},
{60, 60}
};
期待される出力：
long long expected = 0;入力：
long[][] scores = new long[][] {
new long[] {60},
new long[] {60, 60}
};
期待される出力：
long expected = 0;解説
Both averages are 60; the tie goes to the smaller index, 0.
参考資料
この課題はCodeUtility用に調整されています。上記の説明と制約に従ってください。