Submission #962240

#	Time	Username	Problem	Language	Result	Execution time	Memory
962240		Cookie	Simple game (IZhO17_game)	C++14	100 / 100	47 ms	10476 KiB

game

#include<bits/stdc++.h>
#include<fstream>
using namespace std;
#define sz(a) (int)a.size()
#define ALL(v) v.begin(), v.end()
#define ALLR(v) v.rbegin(), v.rend()
#define ll long long
#define pb push_back
#define forr(i, a, b) for(int i = a; i < b; i++)
#define dorr(i, a, b) for(int i = a; i >= b; i--)
#define ld long double
#define vt vector
#include<fstream>
#define fi first
#define se second
#define pll pair<ll, ll>
#define pii pair<int, int>
#define mpp make_pair
const ld PI = 3.14159265359, prec = 1e-9;;
//using u128 = __uint128_t;
//const int x[4] = {1, 0, -1, 0};
//const int y[4] = {0, -1, 0, 1};
const ll mod = 1e9 + 7, pr = 31;
const int mxn = 1e6 + 5, mxq = 1e5 + 5, sq = 450, mxv = 5e4 + 1;
//const int base = (1 <<18);
const ll inf = 1e9 + 5, neg = -69420, inf2 = 1e14;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
// have fun!
int n, m;
int bit[mxn + 1], h[mxn + 1];
void upd(int p, int v){
    while(p <= mxn){
        bit[p] += v; p += p & (-p);
    }
}
int get(int p){
    int ans = 0;
    while(p){
        ans += bit[p]; p -= p & (-p);
    }
    return(ans);
}
void upd(int l, int r, int v){
    if(l > r)swap(l, r);
    upd(l, v); upd(r + 1, -v);
}
void solve(){
    cin >> n >> m;
    for(int i = 1; i <= n; i++)cin >> h[i];
    for(int i = 1; i < n; i++){
        upd(h[i], h[i + 1], 1);
    }
    for(int i = 0; i < m; i++){
        int idq; cin >> idq;
        if(idq == 1){
            int pos, val; cin >> pos >> val;
            if(pos > 1)upd(h[pos - 1], h[pos], -1);
            if(pos < n)upd(h[pos], h[pos + 1], -1);
            h[pos] = val;
            if(pos > 1)upd(h[pos - 1], h[pos], 1);
            if(pos < n)upd(h[pos], h[pos + 1], 1);
        }else{
            int v; cin >> v;
            cout << get(v) << "\n";
        }
    }
}
signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    //freopen("netw.inp", "r", stdin);
    //freopen("netw.out", "w", stdout)
    int tt; tt = 1;
    while(tt--){
        solve();
 
    }
    return(0);
}

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