求助

#include<bits/stdc++.h>

using namespace std;

const int MAXN=10000000;

int n,x,op;

vector <int> a;

inline int read()
{
    char c = getchar();int x = 0,s = 1;
    while(c < '0' || c > '9') {if(c == '-') s = -1;c = getchar();}
    while(c >= '0' && c <= '9') {x = x*10 + c -'0';c = getchar();}
    return x*s;
}



int main()
{
	ios::sync_with_stdio(false);
	int minn=1e9,f;
	n = read();
	for(int i = 1;i <= n;i ++)
	{
		minn=1e9;
		op = read();
		if(op == 1)
		{
			x = read();
			a.push_back(x);
		}
		else if(op == 2)
		{
			for(int j = 0;j < a.size(); j++)
			if(a[j]<minn)
			minn = a[j];
			cout << minn <<"\n";
		}
		else if(op == 3)
		{
			for(int j = 0;j < a.size(); j++)
			if(a[j]<minn)
			{
				f = j;minn = a[j];
			}
			a.erase(a.begin()+f);
		}
	}
	return false;
}