Envío 5520

Código

#include <bits/stdc++.h>
#define REP(i,n) for(int i=0; i<n;i++)
#define pb push_back
#define ff first
#define ss second
#define ii pair<int,int>
#define vi vector<int>
#define vii vector<ii>
#define lli unsigned long long int 
#define fast_io ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
using namespace std;
ostream& operator<<(ostream& os, const vector<int> &v){
    for(auto const &i: v){
        os<<i<<" ";
    }
    os<<endl;
    return os;
}
const lli mod=(1e9)+7;
const int N = 1e4+1;
int main(){
    fast_io;
    lli a,b;
    cin>>a;
    cin>>b;
    //cout<<a<<endl;
    //cout<<b<<endl;
    int steps = 0;
    int carry = 0;
    while(a>0 || b>0){
        if((a&1)+(b&1)+carry >=2)carry = 1;
        a>>=1;
        b>>=1;
        steps++;
    }
    //cout<<steps<<endl;
    //cout<<carry<<endl;
    if(steps>64 && carry)cout<<"Overflow"<<endl;
    else cout<<"Safe"<<endl;
    return 0;
}