Submission #1199902

#	Time	Username	Problem	Language	Result	Execution time	Memory
1199902		TgX_2	Vudu (COCI15_vudu)	C++20	140 / 140	226 ms	23896 KiB

vudu

/*-----------------------------
        Author : TgX.2
       11Ti - K28 - CHV
-----------------------------*/

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

#ifdef TGX 
#include "debug.h"
#else 
#define debug(...)
#endif 

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

#define fi                 first
#define se                 second
#define pb                 push_back
#define len(x)             (int)((x).size())
#define all(x)             (x).begin(), (x).end()

#define _                  << " " <<
#define __                 << "\n"
#define ___                << " "

#define ______________TgX______________ main()
#define int                long long
#define intmax             1e9
#define intmin            -1e9
#define llongmax           1e18
#define llongmin          -1e18
#define memo(a, val)       memset((a), (val), sizeof((a)))

struct custom {
    static uint64_t splitmix64(uint64_t x) {
        x += 0x9e3779b97f4a7c15;
        x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
        x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
        return x ^ (x >> 31);
    }

    size_t operator()(uint64_t x) const {
        static const uint64_t FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
        return splitmix64(x + FIXED_RANDOM);
    }
};
template<class T1, class T2> using cmap = unordered_map<T1, T2, custom>;

template<typename T1, typename T2> 
bool mini(T1 &a, T2 b)
    {if (a > b) a = b; else return 0; return 1;}

template<typename T1, typename T2> 
bool maxi(T1 &a, T2 b)
    {if (a < b) a = b; else return 0; return 1;}
/*-----------------------------*/

const int maxn = 1e6 + 7;
int n, x, a[maxn];

class FenwickTree {
private:
    int n;
    vector<int> bit;

    int query(int pos) {
        int ans = 0;
        for(; pos >= 1; pos -= (pos & -pos)) ans += bit[pos];
        return ans;
    }

    void change(int pos, int val) {
        for(; pos <= n; pos += (pos & -pos)) bit[pos] += val;
    }

public:
    FenwickTree(int _n) {
        n = _n;
        bit.assign(n + 7, 0);
    }

    void update(int pos, int val) { change(pos, val); }
    void update(int l, int r, int val) {
        change(l, val);
        change(r + 1, -val);
    }
    int get(int l) { return query(l); }
    int get(int l, int r) { return query(r) - query(l - 1); }
};

void process() {
    cin >> n;
    a[0] = 0;
    FOR(i, 1, n) cin >> a[i];
    cin >> x;

    FOR(i, 1, n) a[i] -= x;

    vector<int> val;
    FOR(i, 1, n) {
        a[i] += a[i - 1];
        val.pb(a[i]);
    }

    val.pb(0);
    sort(all(val));
    val.erase(unique(all(val)), val.end());

    FOR(i, 0, n)
        a[i] = lower_bound(all(val), a[i]) - val.begin() + 1;

    FenwickTree ft(1000000);
    ft.update(a[0], 1);
    // debug(a[0]);
    int ans = 0;
    FOR(i, 1, n) {
        // cout << ft.get(a[i]) __ ;
        ans += ft.get(a[i]);
        // debug(a[i]);
        ft.update(a[i], 1);
    }
    cout << ans;
}



/*-----------------------------*/
______________TgX______________ {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);  
    if (fopen("temp.inp", "r")) {
        freopen("temp.inp", "r", stdin);
        freopen("temp.out", "w", stdout);
    }
    process();
    cerr << "Time: " << 1.0 * clock() / CLOCKS_PER_SEC << " s." __ ;
}


/*==============================+
|INPUT                          |
--------------------------------|

================================+
|OUTPUT                         |
--------------------------------|

===============================*/

Compilation message (stderr)

vudu.cpp:28:41: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   28 | #define ______________TgX______________ main()
      |                                         ^~~~
vudu.cpp:130:1: note: in expansion of macro '______________TgX______________'
  130 | ______________TgX______________ {
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vudu.cpp: In function 'int main()':
vudu.cpp:134:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  134 |         freopen("temp.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
vudu.cpp:135:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  135 |         freopen("temp.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 140 / 140