题解

#include <iostream>
#include <string.h>
using namespace std;

int main() {
    int n;
    char op[8];
    int data[100000] = {0};
    int size = 0, temp;
    
    cin >> n;
    for (int i = 0; i < n; i++)
    {
        cin >> op;
        if (strcmp(op, "push") == 0)
        {
            cin >> temp;
            data[size] = temp;
            size++;
        }
        else
        {
            if (strcmp(op, "pop") == 0)
            {
                if (size > 0)
                {
                    data[size - 1] = 0;
                    size -= 1;
                }
                else
                {
                    cout << "error" << endl;
                }
            }
            else if (strcmp(op, "top") == 0)
            {
                 if (size > 0)
                 {
                     cout << data[size - 1] << endl;
                 }
                else
                {
                    cout << "error" << endl;
                }
            }
            else if (strcmp(op, "get_min") == 0)
            {
                if (size > 0)
                {
                    temp = data[0];
                    for (int j = 1; j < size; j++)
                    {
                        if (data[j] < temp)
                            temp = data[j];                            
                    }
                    cout << temp << endl;
                }
                else
                {
                    cout << "error" << endl;
                }
            }
            else
            {
                cout << "error" << endl;
            }            
        }
    }
    
    return 0;
}