oj.uz

Submission #337655

# Submission time Handle Problem Language Result Execution time Memory
337655 2020-12-21T11:16:47 Z tengiz05 Weighting stones (IZhO11_stones) C++17
100 / 100
 206 ms 3812 KB 
#include <bits/stdc++.h>
using namespace std;
#define FASTIO ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define pii pair<int, int>
#define ff first
#define ss second
#define PI acos(-1)
#define ld long double
const int mod = 1e9+7, N = 2e5+5;
int msb(int val){return sizeof(int)*8-__builtin_clzll(val);}
int n, m, k;
struct segtree{
	struct node{
		int mn, mx;
		int toprop;
	};
	vector<node> t;
	void build(){
		t.assign(n*2, {0,0,0});
	}
	void prop(int x){
		if(x < n)t[x*2].toprop+=t[x].toprop, t[x*2+1].toprop+=t[x].toprop;
		t[x].mn += t[x].toprop;
		t[x].mx += t[x].toprop;
		t[x].toprop=0;
	}
	void app(int x){
		vector<int> tmp;
		while(x){
			tmp.pb(x);
			x>>=1;
		}reverse(all(tmp));
		for(auto xx : tmp)prop(xx);
	}
	void fix(int x){
		while(x){
			prop(x*2);
			prop(x*2+1);
			t[x].mn = min(t[x*2].mn, t[x*2+1].mn);
			t[x].mx = max(t[x*2].mx, t[x*2+1].mx);
			x>>=1;
		}
	}
	void update(int l, int r, int val){
		int tl = l, tr = r;
		l+=n,r+=n;
		app(l);app(r);
		for(;l<=r;l>>=1,r>>=1){
			if(l%2==1)t[l++].toprop += val,prop(l-1);
			if(r%2==0)t[r--].toprop += val,prop(r+1);
		}app(tl+n);app(tr+n);
		fix((tl+n)>>1); fix((tr+n)>>1);
	}
};
void solve(int test_case){
	int i, j;
	cin >> n;
	segtree seg; seg.build();
	for(i=0;i<n;i++){
		int w, s;
		cin >> w >> s;
		if(s == 1)seg.update(0, w-1, 1);
		else seg.update(0, w-1, -1);
		int mn = seg.t[1].mn;
		int mx = seg.t[1].mx;
		if(mn >= 0){
			cout << ">\n";
		}else if(mx <= 0){
			cout << "<\n";
		}else {
			cout << "?\n";
		}
	}
	return;
}

signed main(){
	FASTIO;
#define MULTITEST 0
#if MULTITEST
	int ___T;
	cin >> ___T;
	for(int T_CASE = 1; T_CASE <= ___T; T_CASE++)
		solve(T_CASE);
#else
	solve(1);
#endif
	return 0;
}

Compilation message

stones.cpp: In function 'void solve(int)':
stones.cpp:58:9: warning: unused variable 'j' [-Wunused-variable]
   58 |  int i, j;
      |         ^

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 3 ms 620 KB Output is correct
8 Correct 3 ms 364 KB Output is correct
9 Correct 3 ms 364 KB Output is correct
10 Correct 15 ms 620 KB Output is correct
11 Correct 108 ms 2156 KB Output is correct
12 Correct 191 ms 3308 KB Output is correct
13 Correct 200 ms 3712 KB Output is correct
14 Correct 196 ms 3660 KB Output is correct
15 Correct 206 ms 3692 KB Output is correct
16 Correct 198 ms 3692 KB Output is correct
17 Correct 198 ms 3692 KB Output is correct
18 Correct 197 ms 3704 KB Output is correct
19 Correct 201 ms 3692 KB Output is correct
20 Correct 196 ms 3692 KB Output is correct
21 Correct 201 ms 3812 KB Output is correct
22 Correct 196 ms 3692 KB Output is correct
23 Correct 200 ms 3692 KB Output is correct
24 Correct 199 ms 3692 KB Output is correct
25 Correct 198 ms 3692 KB Output is correct