Submission #1025626

#	Time	Username	Problem	Language	Result	Execution time	Memory
1025626		_rain_	Zoltan (COCI16_zoltan)	C++14	21 / 140	80 ms	5848 KiB

zoltan

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

mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
namespace Random
{
    #define int long long
    int Rand(int l , int r)
    {
        return uniform_int_distribution<int>(l , r)(rng);
    }
    #undef int 
}

using i64 = long long;
using ui64 = unsigned long long;

#define MASK(x) ((i64)(1) << (x))
#define BIT(mask , x) (((mask) >> (x)) & (1))
#define sz(x) (x).size()
#define all(x) (x).begin() , (x).end()

#define FOR(i ,a , b) for (int i = (a); i <= (b); ++i)
#define FORD(i , a , b) for (int i = (b); i >= (a); --i)
#define REP(i , a , b) for (int i = (a); i < (b); ++i)
#define REPD(i , a , b) for (int i = (b) - 1 ; i >= (a); --i)

template <class T> 
    void compress(vector<T> &a)
    {
        sort(a.begin() , a.end());
        a.resize(unique(a.begin() , a.end()) - a.begin());
        return;
    }
template<class T>
    void printArr(T& container , string separator = "" , string finish = "\n")
    {
        for (auto& item : container) cout << item << separator;
        cout << finish;
    }

template<class T>
    bool maximize(T &a , T b) {if (a < b) return a = b , true; else return false;}
template<class T>
    bool minimize(T &a , T b) {if (a > b) return a = b , true; else return false;}
template<class T>
    T gcd(T x , T y) {while (y) swap(y , x %= y); return x;}
template<class T>
    T lcm(T x , T y) {return (x * y) / gcd(x , y);}

//... INPUT
    void INPUT(string name)
    {
        iostream::sync_with_stdio(false); cin.tie(0);
        if (!fopen((name + ".inp").c_str() , "r")) return;
        freopen((name + ".inp").c_str() , "r" , stdin);
        freopen((name + ".out").c_str() , "w+" , stdout);
    }

const int maxn = 2e5;
//... MOD OPERATOR
    const int MOD = 1e9 + 7;
    int add(int a , int b)
    {
        return (a + b >= MOD ? a + b - MOD : a + b);
    }
    int mul(int a , int b)
    {
        return (i64)a * b % MOD;
    }
    int binpow(int a , int b)
    {
        int res = 1;
        for (; b; b >>= 1 , a = mul(a,a))
            if (b&1) res = mul(res , a);
        return res;
    }
//... FEN
    class fenwick
    {
        public:
            vector<int> BIT;
            int n;

            void init(int _n)
            {
                n = _n;
                BIT.assign(n + 2 , {0});
                return;
            }
            void upd(int pos , int val)
                {
                    for (; pos <= n ; pos += pos & -pos)
                        BIT[pos] += val;
                    return;
                }
            int get(int pos)
            {
                int sum = 0;
                for (; pos; pos -= pos&-pos)
                    sum += BIT[pos];
                return sum;
            }
            int sum_range(int l , int r)
                {
                    return get(r) - get(l - 1);
                }
    };

fenwick LIS , LDS;
int n , a[maxn + 2];

int32_t main()
{
    INPUT("main");
        cin >> n;
        vector<int> value;
        FOR(i,1,n) 
            {
                cin >> a[i];
                value.push_back(a[i]);
            }
        compress(value);
        int length = sz(value); LIS.init(length); LDS.init(length);
        FOR(i,1,n) a[i] = upper_bound(all(value),a[i]) - value.begin();
        int mxlength = 0 , cnt = 0;
        FORD(i,1,n)
        {
            int dec = LDS.sum_range(a[i] + 1 , length);
            int inc = LIS.sum_range(1 , a[i] - 1);
            int x1 = LDS.sum_range(a[i],a[i]) , x2 = LIS.sum_range(a[i],a[i]);

            if (maximize(mxlength , dec + inc + 1)) cnt = 1;
                else if (mxlength == dec + inc + 1) ++cnt;
            LIS.upd(a[i],-x1); LDS.upd(a[i] , -x2);
            LIS.upd(a[i],1); LDS.upd(a[i],1);
        }
        cout << mxlength << ' ' << mul(cnt , binpow(2 , n - mxlength));
    cerr << "\nTIME RUN : " << 1000 * clock()/CLOCKS_PER_SEC << " MS \n";

}
/** lockheed martin build me - Red Bull boost me **/

Compilation message (stderr)

zoltan.cpp: In function 'void INPUT(std::string)':
zoltan.cpp:56:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |         freopen((name + ".inp").c_str() , "r" , stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
zoltan.cpp:57:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |         freopen((name + ".out").c_str() , "w+" , stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 21 / 140