#include<bits/stdc++.h>
using namespace std;
typedef long long LL ;

vector <LL> v[100];
vector <LL> v1;
int main(){

    cout << v[1].size() - 1 << endl;
    //This gives output 4294967295
    int sz = v[1].size() - 1;
    cout << sz << endl;
    //This gives output -1
    LL sz1 = v[1].size() - 1;
    cout << sz1 << endl;
    //This gives output 4294967295

    cout << v[1].size() << endl;
    //This gives output 0

    cout << v1.size() - 1 << endl;
    //This gives output 4294967295
    cout << v1.size() << endl;
    //This gives output 0
}

Can anyone give any explanation? I lost a lot of valuable time in the contests for these stuffs and I can't understand why.