Submission #83328

#	Time	Username	Problem	Language	Result	Execution time	Memory
83328		Nordway	Simple game (IZhO17_game)	C++14	0 / 100	1075 ms	1716 KiB

game

#include<bits/stdc++.h>
#define x first
#define y second
#define pb push_back
#define mp make_pair
#define up_b upper_bound
#define low_b lower_bound
#define sz(x) (int)x.size()
#define all(v) v.begin(),v.end()
#define boost ios_base::sync_with_stdio(0),cin.tie(0),cout.tie()

using namespace std;

typedef unsigned long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<int,ll> pil;
typedef pair<ll,int> pli;
typedef pair<ll,ll> pll;

const ll INF = 1e18;
const int inf = INT_MAX;
const ll mod = 1e9 + 7;
const int pi = acos(-1);
const int dx[4] = {0, 1, 0, 0};
const int dy[4] = {1, 0, 0, 0};
const int N = 1e5 + 5;
const int MAXN = 1e6 + 1;
int t[4 * MAXN], a[N], z[4 * MAXN];

void push(int v, int tl, int tr){
	if(z[v]){
		if(tl != tr){
			z[v * 2] += z[v];
			z[v * 2 + 1] += z[v];
		}
		t[v] += z[v];
		z[v] = 0;
	}
}

void upd(int v, int tl, int tr, int l, int r, int val){
	if(tl > r || l > tr)return;
	if(l <= tl && tr <= r){
		z[v] += val;
		push(v, tl, tr);
		return ;
	}
	push(v, tl, tr);
	int tm = (tl + tr) / 2;
	upd(v * 2, tl, tm, l, r, val);
	upd(v * 2 + 1, tm + 1, tr, l, r, val);
	t[v] = t[v * 2] + t[v * 2 + 1];
}

int get(int v, int tl, int tr, int pos){
	push(v, tl, tr);
	if(tl == tr)return t[v];
	int tm = (tl + tr) / 2;
	if(pos <= tm)return get(v * 2, tl, tm, pos);
	else return get(v * 2 + 1, tm + 1, tr, pos);
}

int main(){
	freopen("game.in", "r", stdin);
	freopen("game.out", "w", stdout);
	int n, m;
	cin >> n >> m;
	for(int i = 1; i <= n; i++){
		cin >> a[i];
		if(i > 1){
			upd(1, 1, 1e6, min(a[i], a[i - 1]), max(a[i], a[i - 1]), 1);
		}
	}
	while(m--){
		int type, h, pos, val;
		cin >> type;
		if(type == 1){
			cin >> pos >> val;
			if(pos != 1)upd(1, 1, 1e6, min(a[pos], a[pos - 1]), max(a[pos], a[pos - 1]), -1);
			if(pos != n)upd(1, 1, 1e6, min(a[pos], a[pos + 1]), max(a[pos], a[pos + 1]), -1);
			a[pos] = val;
			if(pos != 1)upd(1, 1, 1e6, min(a[pos], a[pos - 1]), max(a[pos], a[pos - 1]), 1);
			if(pos != n)upd(1, 1, 1e6, min(a[pos], a[pos + 1]), max(a[pos], a[pos + 1]), 1);
		}
		else{
			cin >> h;
			cout << get(1, 1, 1e6, h) << endl;
		}
	}
	
}

Compilation message (stderr)

game.cpp: In function 'int main()':
game.cpp:65:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("game.in", "r", stdin);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
game.cpp:66:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("game.out", "w", stdout);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 22
• Subtask 2: 0 / 27
• Subtask 3: 0 / 51