Submission #17718

#	Time	Username	Problem	Language	Result	Execution time	Memory
17718		Adilkhan	Weighting stones (IZhO11_stones)	C++98	100 / 100	80 ms	23220 KiB

stones

#include <bits/stdc++.h>

#define pb push_back
#define endl "\n"
#define mp make_pair 
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define fname ""
#define sz(x) (int)(x.size())

typedef long long ll;

using namespace std;

const ll N = (ll)(5e5) + 322;
const ll INF = (ll)(1e9);
const ll mod = (ll)(1e9) + 7;
const double eps = 1e-9;

int n, x[N], y[N], q, s, sum, mn, mx;

int add[N];
pair <int, int> t[N * 4];

void push(int x, int l, int r) {
	if (add[x]) {
		t[x].fi += add[x];
		t[x].se += add[x];
		if (l != r) {
			add[x + x] += add[x];
			add[x + x + 1] += add[x];
		}
		add[x] = 0;
	}			
}

void upd(int x, int tl, int tr, int l, int r, int val) {
	push(x, tl, tr);
	if (l <= tl && tr <= r) {
		add[x] += val;
		push(x, tl, tr);
		return;	
	}
	if (tl > r || tr < l) {
		return;		                  	
	}
	int mid = (tl + tr) / 2;
	upd(x + x, tl, mid, l, r, val);
	upd(x + x + 1, mid + 1, tr, l, r, val);
	t[x].fi = max(t[x + x].fi, t[x + x + 1].fi);
	t[x].se = min(t[x + x].se, t[x + x + 1].se);
}


int main () {
	//freopen(fname".in", "r", stdin);
	//freopen(fname".out", "w", stdout);
	scanf("%d", &n);
	for (int i = 1; i <= n; ++i) {
		scanf("%d%d", &q, &s);
		if (s == 1) {
			upd(1, 1, n, 1, q, 1);
		}else {  
			upd(1, 1, n, 1, q, -1);
		}       
		mx = t[1].fi;                       
		mn = t[1].se;
		if (mn < 0 && mx > 0) {
	  	puts("?");
		}
		if (mn >= 0 && mx >= 0) {
			puts(">");
		}
		if (mn <= 0 && mx <= 0) {
			puts("<");
		}
	}
	return 0;
}

• Subtask 1: 100 / 100