Submission #1124146

#	Time	Username	Problem	Language	Result	Execution time	Memory
1124146		ljtunas	Izbori (COCI22_izbori)	C++20	0 / 110	15 ms	7100 KiB

Main

// author : anhtun_hi , nqg
// 25-26.12.2024

#include <bits/stdc++.h>
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define reset(h, v)    memset(h, v, sizeof h)
#define Forv(i, a)     for(auto& i : a)
#define For(i, a, b)   for(int i = a; i <= b; ++i)
#define Ford(i, a, b)  for(int i = a; i >= b; --i)
#define c_bit(i)     __builtin_popcountll(i)
#define Bit(mask, i)    ((mask >> i) & 1LL)
#define onbit(mask, i)  ((mask) bitor (1LL << i))
#define offbit(mask, i) ((mask) &~ (1LL << i))
#define Log2(x) (63 - __builtin_clzll(x))
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
using namespace std;

using ll = long long;
using ii = pair<ll, ll>;
using db = long double;
using ull = unsigned long long;

namespace std {
    template <typename T, int D>
    struct _vector : public vector <_vector <T, D - 1>> {
        static_assert(D >= 1, "Dimension must be positive!");
        template <typename... Args>
        _vector(int n = 0, Args... args) : vector <_vector <T, D - 1>> (n, _vector <T, D - 1> (args...)) {}
    };
    template <typename T> struct _vector <T, 1> : public vector <T> {
        _vector(int n = 0, const T& val = T()) : vector <T> (n, val) {}
    };
    template <class A, class B> bool minimize(A &a, B b){return a > b ? a = b, true : false;}
    template <class A, class B> bool maximize(A &a, B b){return a < b ? a = b, true : false;}
}
const int dx[] = {0, 0, +1, -1}, dy[] = {-1, +1, 0, 0}, LOG = 20, base = 311, inf = 1e9 + 5;
const int MAXN = 2e5 + 5, Block = 445;
const  ll  mod = 1e9 + 7;
const  ll   oo = 1e18;

//#define int long long

int n, a[MAXN];
vector<int> List[MAXN];

ll f[MAXN];
struct Fenwick{
    int bit[MAXN * 2];
    void update(int u, int val){
        ++u;
        while(u) bit[u] += val, u -= u &- u;
    }
    int get(int u){
        ++u;
        int res = 0;
        while (u <= n + 1) res += bit[u], u += u &- u;
        return res;
    }
    int get(int l, int r){
        return get(l) - get(r + 1);
    }
} T[450];

ll Sum = 0;

ll lazy[MAXN];
void add(int i){
    if (lazy[i / Block] != 0){
        for (int j = i; j <= n, j / Block == i / Block; ++j){
            T[i / Block].update(f[j], -1);
            T[i / Block].update(f[j] + lazy[i / Block], +1);
        }
        for (int j = i - 1; j >= 1, j / Block == i / Block; --j){
            T[i / Block].update(f[j], -1);
            T[i / Block].update(f[j] + lazy[i / Block], +1);
        }
        lazy[i / Block] = 0;
    }
    For(j, 1, i / Block - 1) Sum -= T[j].get(1, f[j] - 1 - lazy[j]);
    For(j, 1, i / Block - 1) Sum += T[j].get(1, f[j] + 2 - 1 - lazy[j]);
    For(j, i / Block + 1, n / Block) lazy[j] += 2;
}

void del(int i){
    if (lazy[i / Block]){
        for (int j = i; j <= n, j / Block == i / Block; ++j){
            T[i / Block].update(f[j], -1);
            T[i / Block].update(f[j] + lazy[i / Block], +1);
        }
        for (int j = i - 1; j >= 1, j / Block == i / Block; --j){
            T[i / Block].update(f[j], -1);
            T[i / Block].update(f[j] + lazy[i / Block], +1);
        }
        lazy[i / Block] = 0;
    }
    For(j, 1, i / Block - 1) Sum -= T[j].get(1, f[j] - 1 - lazy[j]);
    For(j, 1, i / Block - 1) Sum += T[j].get(1, f[j] - 2 - 1 - lazy[j]);
    For(j, i / Block + 1, n / Block) lazy[j] -= 2;
}

void Solve() {
    cin >> n;
    vector<int> compress;
    For(i, 1, n) cin >> a[i], compress.push_back(a[i]);
    sort(all(compress));
    For(i, 1, n) {
        a[i] = lower_bound(all(compress), a[i]) - compress.begin() + 1;
        List[a[i]].push_back(i);
    }
//    For(i, 1, n) f[i] = f[i - 1] - 1, T[i / Block].update(f[i], 1);
    For(u, 1, n){

    }
}

signed main() {
    cin.tie(0) -> sync_with_stdio(0);
    if(fopen("a.inp", "r")) {
        freopen("a.inp", "r", stdin);
        freopen("a.out", "w", stdout);
    }

    int t = 1;
//    cin >> t;
    while(t --) Solve();
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:121:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  121 |         freopen("a.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
Main.cpp:122:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  122 |         freopen("a.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 15
• Subtask 4: 0 / 70