不知道哪里错？？只知道评测点最后一个是WA。。即使这个代码100分。。请求 大佬帮我解答一下

#include <iostream>
using namespace std;

int main()
{
   int week[7];
   int a,b;
   int maxday = 0;
   int max = 0;
   for (int i=0;i<7;i++)
   {
   	cin >> a >> b;
   	week[i] = a+b;
   }
   
   for (int i=0;i<7;i++)
   {
   	if (week[i] > max ) 
   	{
   		max = week[i];
   		maxday = i+1;
   	} 
   }
   cout << maxday << endl;
   return 0;
}