Submission #581587

#	Time	Username	Problem	Language	Result	Execution time	Memory
581587		Dakto	Fish (IOI08_fish)	C++17	8 / 100	3054 ms	36072 KiB

fish

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

using namespace std;
using namespace __gnu_pbds;

#define DEBUGMODE 1
#ifdef ONLINE_JUDGE
#define DEBUGMODE 0
#endif

#define cerr if(DEBUGMODE) cerr
#define DEBUG(a) if(DEBUGMODE) cout<<(a)<<endl
#define REP(i,n) for(int i=0; i<(n); i++)
#define REPR(i, begin, end) for (__typeof(end) i = (begin) - ((begin) > (end)); i != (end) - ((begin) > (end)); i += 1 - 2 * ((begin) > (end)))
#define EACH(i,c) for(auto (i):c)
#define endl '\n'
#define ff first
#define ss second
#define all(x) begin(x), end(x)
#define LLM LONG_LONG_MAX
#define gcd __gcd
#define pb push_back
#define MANY_TESTS ll ntests; cin>>ntests; for(ll test=1; test<=ntests; test++) 
#define contains(a,b) ((a).find(b)!=(a).end())
#define INF 1e16
#define NINF -1e16
#define cinv(n,v) ll n; cin>>n; vl v(n); cin>>v;
#define fact(f,n) vl f={0}; for(ll i=0; i<n; i++) f.push_back(f[i]*(i+1));
#define codejamout(s) cout<<"Case #"<<test<<": "<<s<<"\n";
#define LOG(x) cerr<<"Line "<<__LINE__<<":"<<#x<<" = "<<x<<endl;


typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<pair<ll,ll>> vpll;
typedef tree<ll,null_type,less<ll>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;

const ll MOD=1e9+7;

template <class T, class U>
ostream& operator<<(ostream& out, const pair<T, U> &par) {out << "(" << par.first << ";" << par.second << ")"; return out;}
template <class T>
ostream& operator<<(ostream& out, const set<T> &cont) { out << "{"; for( const auto &x:cont) out << x << ", "; out << "}"; return out; }
template <class T, class U>
ostream& operator<<(ostream& out, const map<T, U> &cont) {out << "{"; for( const auto &x:cont) out << x << ", "; out << "}"; return out; }
template<class T>
ostream& operator<<(ostream& out, const vector<T> &v){ out << "[";  REP(i, v.size()) out << v[i] << ", ";  out << "]"; return out;}
// istreams
template<class T>
istream& operator>>(istream& in, vector<T> &v){ for(auto &x : v) in >> x; return in; }
template<class T, class U>
istream& operator>>(istream& in, pair<T, U> &p){ in >> p.ff >> p.ss; return in; }

template<typename T>
pair<T, ll> get_min(vector<T> &v){ typename vector<T> :: iterator it = min_element(v.begin(), v.end()); return {*it, it - v.begin()};}
template<typename T>
pair<T, ll> get_max(vector<T> &v){ typename vector<T> :: iterator it = max_element(v.begin(), v.end()); return {*it, it - v.begin()};}        
template<class T>
bool remin(T& a, const T& b){return (b<a?a=b,1:0);}
template<class T>
bool remax(T& a, const T& b){return (a<b?a=b,1:0);}

int main(){
    cin.tie(NULL);
    cout.tie(NULL);
    ios_base::sync_with_stdio(false);

    ll f,k,m;
    cin>>f>>k>>m;

    vpll v(f);

    REP(i,f){
        cin>>v[i].ff>>v[i].ss;
    }

    map<ll,ll> cnts;

    EACH(i, v){
        cnts[i.ss]++;
    }

    sort(all(v), greater<pll>());

    ll p2=0;

    set<ll> seen;
    map<ll,ll> dels;

    long long res=m-1;

    for(int p1=0; p1<f; p1++){
        //cout<<res<<endl;
        if(v[0].ff>=2*v[p1].ff) break;

        while(p2<f && v[p2].ff*2>v[p1].ff){
            cnts[v[p2].ss]--;
            dels[v[p2].ss]++;
            p2++;
        }
        if(p2==f) break;

        if(!contains(seen, v[p1].ss)){
            seen.insert(v[p1].ss);

            ll dlta=1;
            
            if(p1!=0 && dels[v[p1].ss]>1) continue;

            EACH(i, cnts){
                if(i.ff != v[p1].ss){
                    dlta*=i.ss+1;
                    dlta%=m;
                }
            }

            if(p1==0){
                dlta*=cnts[v[p1].ss]+2;
                dlta%=m;
            }

            res+=dlta;
            res%=m;
        }


    }

    cout<<res<<endl;

    
    return 0;
}

Compilation message (stderr)

fish.cpp: In function 'int main()':
fish.cpp:18:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   18 | #define EACH(i,c) for(auto (i):c)
      |                            ^
fish.cpp:85:5: note: in expansion of macro 'EACH'
   85 |     EACH(i, v){
      |     ^~~~
fish.cpp:18:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   18 | #define EACH(i,c) for(auto (i):c)
      |                            ^
fish.cpp:116:13: note: in expansion of macro 'EACH'
  116 |             EACH(i, cnts){
      |             ^~~~

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