编辑代码

#include <iostream>
#include <vector>
using namespace std;

int findMax(vector<int> &nums){
    int ret = nums[0];
    for(int i = 1; i < nums.size(); i++){
        ret = nums[i] > ret ? nums[i] : ret;
    }
    return ret;
}
int main() {
    vector<vector<int>> ves = {
        {3, 5, 6, 1},
        {6, 9, 5, 7},
        {1, 6, 6, 8}
    };
    for(int i = 0; i < ves.size(); i++){
        cout<< findMax(ves[i])<<endl;
    }
	return 0;
}