Submission #474515

#	Time	Username	Problem	Language	Result	Execution time	Memory
474515		Carmel_Ab1	Data Transfer (IOI19_transfer)	C++17	0 / 100	6 ms	2476 KiB

transfer

#include<bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

//using namespace __gnu_pbds;
using namespace std;

typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int>vi;
typedef vector<vector<int>>vvi;
typedef vector<ll>vl;
typedef vector<vl> vvl;
typedef pair<int,int>pi;
typedef pair<ll,ll> pl;
typedef vector<pl> vpl;
typedef vector<ld> vld;
typedef pair<ld,ld> pld;
//typedef tree<ll, null_type, less_equal<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
template<typename T> ostream& operator<<(ostream& os, vector<T>& a){os<<"[";for(int i=0; i<ll(a.size()); i++){os << a[i] << ((i!=ll(a.size()-1)?" ":""));}os << "]\n"; return os;}

#define all(x) x.begin(),x.end()
#define YES out("YES")
#define NO out("NO")
#define out(x){cout << x << "\n"; return;}
#define GLHF ios_base::sync_with_stdio(false); cin.tie(NULL)
#define print(x){for(auto ait:x) cout << ait << " "; cout << "\n";}
#define pb push_back
#define umap unordered_map

template<typename T1, typename T2> istream& operator>>(istream& is, pair<T1, T2>& p){is >> p.first >> p.second;return is;}
template<typename T1, typename T2> ostream& operator<<(ostream& os, pair<T1, T2>& p){os <<"" << p.first << " " << p.second << ""; return os;}
void usaco(string taskname){
    string fin = taskname + ".in";
    string fout = taskname + ".out";
    const char* FIN = fin.c_str();
    const char* FOUT = fout.c_str();
    freopen(FIN, "r", stdin);
    freopen(FOUT, "w", stdout);
}
template<typename T>
void read(vector<T>& v){
    int n=v.size();
    for(int i=0; i<n; i++)
        cin >> v[i];
}
template<typename T>
vector<T>UNQ(vector<T>a){
    vector<T>ans;
    for(T t:a)
        if(ans.empty() || t!=ans.back())
            ans.push_back(t);
    return ans;
}
ll ceil(ll a,ll b){
    ll ans=a/b;
    if(a%b)ans++;
    return ans;
}
ld log (ld a,ld b){return log(b)/log(a);}
ll power(ll base, ll exp,ll M=1e18){//(base^exp)%M
    ll ans=1;
    while(exp){
        if(exp%2==1)ans=((ans%M)*(base%M))%M;
        base=((base%M)*(base%M))%M;
        exp/=2;
    }
    return ans;
}

string to_base(int n,int new_base){
    string s;
    int nn=n;
    while(nn){
        s+=to_string(nn%new_base);
        nn/=new_base;
    }
    reverse(all(s));
    return s;
}
ll gcd(ll a,ll b){
    if(a<b)swap(a,b);
    if(b==0)return a;
    return gcd(b,a%b);
}
ll lcm(ll a,ll b){
    ll x= (a/gcd(a,b));
    return b*x;
}
vl generate_array(ll n,ll mn=1,ll mx=1e18+1){
    if(mx==1e18+1)
        mx=n;
    vl ans(n);
    for(int i=0; i<n;i++)
        ans[i]=(mn+rand()%(mx-mn+1));
    return ans;
}
string substr(string s,int l,int r){
    string ans;
    for(int i=l; i<=r; i++)
        ans+=s[i];
    return ans;
}

#include "transfer.h"
//#include "grader.cpp"
vi get_attachment(vi source) {
    int x=0;
    for(int i=0; i<source.size(); i++)
        x^=(i*source[i]);
    vi ans(source.size()==255?9:7);
    for(int i=0; i<10; i++)
        if(x&(1<<i))
            ans[i]=1;
    ans.back()=source[0];
    return ans;
}
vi retrieve(vi data) {
    if(data.back()!=data[0]){
        data[0]^=1;
        while(data.size()!=255 && data.size()!=63)
            data.pop_back();
        return data;
    }
    if(data.size()==264){
        vi ans(255);
        int x=0;
        for(int i=0; i<263; i++)
            x^=(i*data[i]);
        for(int i=0; i<255; i++)
            ans[i]=data[i];
        ans[x]^=1;
        return ans;
    }
    vi ans(63);
    int x=0;
    for(int i=0; i<69; i++)
        x^=(i*data[i]);
    for(int i=0; i<=63; i++)
        ans[i]=data[i];
    if(x)
        ans[x]^=1;
    return ans;

}

Compilation message (stderr)

transfer.cpp: In function 'vi get_attachment(vi)':
transfer.cpp:110:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  110 |     for(int i=0; i<source.size(); i++)
      |                  ~^~~~~~~~~~~~~~
transfer.cpp: In function 'void usaco(std::string)':
transfer.cpp:39:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |     freopen(FIN, "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~
transfer.cpp:40:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |     freopen(FOUT, "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~
transfer.cpp: In function 'vi retrieve(vi)':
transfer.cpp:141:15: warning: 'void* __builtin_memcpy(void*, const void*, long unsigned int)' forming offset [252, 255] is out of the bounds [0, 252] [-Warray-bounds]
  141 |         ans[i]=data[i];

• Subtask 1: 0 / 60
• Subtask 2: 0 / 40