我直接上代码，>>>

#include<iostream>
#include<vector>
#include<string>

struct student {
std::string name;
int weight;
};

int main() {
int n;
stdcin >> n;
stdvector<student> stu(n);
for (int i = 0; i < n; i++) {
stdcin >> stu[i].name >> stu[i].weight;
}
for (int i = 0; i < n; i++) {
stdcout << stu[i].name << "->" << stu[i].weight << std::endl;
}
return 0;
}