Submission #478202

#	Time	Username	Problem	Language	Result	Execution time	Memory
478202		urosk	Sirni (COCI17_sirni)	C++14	98 / 140	2923 ms	786436 KiB

sirni

// __builtin_popcount(x) broj bitova
// __builtin_popcountll(x) long long
#define here cerr<<"---------------------------\n"
#include "bits/stdc++.h"
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#define ld double
#define ll long long
#define ull unsigned long long
#define llinf 100000000000000000LL // 10^17
#define iinf 2000000000 // 2*10^9
#define pb push_back
#define popb pop_back
#define fi first
#define sc second
#define endl '\n'
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pld pair<ld,ld>
#define sz(a) int(a.size())
#define all(a) a.begin(),a.end()
#define rall(a) a.begin(),a.end(),greater<int>()
#define getunique(v) {sort(all(v)); v.erase(unique(all(v)), v.end());}

using namespace std;
using namespace __gnu_pbds;

typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;

void setIO(string inoutname)
{
	freopen((inoutname+".in").c_str(),"r",stdin);
    	freopen((inoutname+".out").c_str(),"w",stdout);
}
#define mod 1
ll gcd(ll a, ll b)
{
   if(b==0) return a;
   if(a==0) return b;
   if(a>=b)  return gcd(a%b,b);
   return  gcd(a,b%a);
}
ll lcm(ll a,ll b){
   return (a/gcd(a,b))*b;
}
ll add(ll a,ll b){
	a+=b;
	a+=mod;
	if(a>=mod) a%=mod;
	return a;
}
ll mul(ll a,ll b){return(a*b)%mod;}
#define maxn 100005
#define maxm 10000005
ll n;
ll a[maxn];
ll dsu[maxn];
ll b[maxm];
ll id[maxm];
ll root(ll x){
    while(x!=dsu[x]){
        dsu[x] = dsu[dsu[x]];
        x = dsu[x];
    }
    return x;
}
bool get(ll x,ll y){return root(x)==root(y);}
void upd(ll x,ll y){dsu[root(y)] = root(x);}
bool bio[maxm];
vector<pll> g[maxm];
void tc(){
	ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);
    cin >> n;
    for(ll i = 1;i<=n;i++){
        cin >> a[i];
        b[a[i]] = a[i];
        if(!id[a[i]]) id[a[i]] = i;
    }
    iota(dsu+1,dsu+n+1,1);
    for(ll i = maxm-2;i>=1;i--){
        if(b[i]) continue;
        b[i] = b[i+1];
    }
    for(ll i = 1;i<=n;i++){
        if(bio[a[i]]) continue;
        bio[a[i]] = 1;
        if(b[a[i]+1]){
            if(2*a[i]>=maxm||b[2*a[i]]!=b[a[i]+1]){
                g[b[a[i]+1]-a[i]].pb({i,id[b[a[i]+1]]});
            }
        }

        for(ll j = 2*a[i];j<maxm&&b[j];j+=a[i]){
            if(j+a[i]>=maxm||b[j+a[i]]!=b[j]){
                g[b[j]-j].pb({i,id[b[j]]});
            }
        }
    }
    ll ans = 0;
    for(ll j = 0;j<maxm;j++){
        for(pll p : g[j]){
            ll u = p.fi;
            ll v = p.sc;
            if(get(v,u)) continue;
            upd(v,u);
            ans+=j;
        }
    }
    cout<<ans<<endl;
}
int main(){
	ios_base::sync_with_stdio(false);cerr.tie(0);cout.tie(0);cin.tie(0);
	//setIO("lol");
	int t; t = 1;
	while(t--){
		tc();
	}
	return 0;
}

Compilation message (stderr)

sirni.cpp: In function 'void setIO(std::string)':
sirni.cpp:32:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |  freopen((inoutname+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
sirni.cpp:33:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |      freopen((inoutname+".out").c_str(),"w",stdout);
      |      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 14 / 14
• Subtask 6: 14 / 14
• Subtask 7: 14 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14