Submission #676511

#	Time	Username	Problem	Language	Result	Execution time	Memory
676511		QwertyPi	Weighting stones (IZhO11_stones)	C++14	100 / 100	176 ms	4508 KiB

stones

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 1e5 + 11;
struct SegTree{
	int mx[MAXN << 2], mn[MAXN << 2], s[MAXN << 2];
	void add(int pos, int val, int v, int l, int r){
		if(l == r){
			mx[v] = mn[v] = s[v] = val;
			return;
		}
		int m = (l + r) / 2;
		if(pos <= m){
			add(pos, val, v * 2 + 1, l, m);
		}else{
			add(pos, val, v * 2 + 2, m + 1, r);
		}
		s[v] = s[v * 2 + 1] + s[v * 2 + 2];
		mx[v] = max(mx[v * 2 + 2], s[v * 2 + 2] + mx[v * 2 + 1]);
		mn[v] = min(mn[v * 2 + 2], s[v * 2 + 2] + mn[v * 2 + 1]);
	}
} segTree;

int main(){
	int n; cin >> n;
	for(int i = 0; i < n; i++){
		int r, s; cin >> r >> s;
		segTree.add(r, s == 1 ? 1 : -1, 0, 1, n);
		if(segTree.mx[0] > 0 && segTree.mn[0] < 0){
			cout << '?' << endl;
		}else if(segTree.mx[0] > 0){
			cout << '>' << endl;
		}else{
			cout << '<' << endl;
		}
	}
}

• Subtask 1: 100 / 100