Submission #1086369

#	Time	Username	Problem	Language	Result	Execution time	Memory
1086369		steveonalex	Simple game (IZhO17_game)	C++17	100 / 100	49 ms	6996 KiB

game

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
#define block_of_code if(true)
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
ll gcd(ll a, ll b){return __gcd(a, b);}
ll lcm(ll a, ll b){return a / gcd(a, b) * b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ull mask){return __builtin_ctzll(mask);}
int logOf(ull mask){return 63 - __builtin_clzll(mask);}
 
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
double rngesus_d(double l, double r){
    double cur = rngesus(0, MASK(60) - 1);
    cur /= MASK(60) - 1;
    return l + cur * (r - l);
}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }

struct FenwickTree{
    int n;
    vector<int> a;

    FenwickTree(int _n){
        n = _n;
        a.resize(n+1);
    }

    void update(int i, int v){
        while(i <= n){
            a[i] += v;
            i += LASTBIT(i);
        }
    }

    void update(int l, int r, int v){
        update(l, v); update(r + 1, -v);
    }

    int get(int i){
        int ans = 0;
        while(i > 0){
            ans += a[i];
            i -= LASTBIT(i);
        }
        return ans;
    }
};

int main(void){
    ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
    clock_t start = clock();

    int n, q; cin >> n >> q;
    vector<int> a(n+1);
    for(int i = 1; i<=n; ++i) cin >> a[i];

    const int N = 1e6 + 69;
    FenwickTree bit(N);
    for(int i = 1; i<n; ++i){
        bit.update(min(a[i], a[i+1]), max(a[i], a[i+1]), 1);
    }

    while(q--){
        int type; cin >> type;
        if (type == 1){
            int i, val; cin >> i >> val;
            if (i > 1) bit.update(min(a[i-1], a[i]), max(a[i-1], a[i]), -1);
            if (i < n) bit.update(min(a[i+1], a[i]), max(a[i+1], a[i]), -1);

            a[i] = val;

            if (i > 1) bit.update(min(a[i-1], a[i]), max(a[i-1], a[i]), 1);
            if (i < n) bit.update(min(a[i+1], a[i]), max(a[i+1], a[i]), 1);
        }
        else{
            int H; cin >> H;
            cout << bit.get(H) << "\n";
        }
    }

    cerr << "Time elapsed: " << clock() - start << " ms\n";
    return 0;
}

• Subtask 1: 22 / 22
• Subtask 2: 27 / 27
• Subtask 3: 51 / 51