oj.uz

Submission #335069

# Submission time Handle Problem Language Result Execution time Memory
335069 2020-12-11T05:14:14 Z limabeans Weighting stones (IZhO11_stones) C++17
100 / 100
 103 ms 13932 KB 
#include <bits/stdc++.h>
using namespace std;

template<typename T>
void out(T x) { cout << x << endl; exit(0); }
#define watch(x) cout << (#x) << " is " << (x) << endl





using ll = long long;

const ll inf = 1e18;



struct minsegtree {
    vector<ll> t,o;
    int n;
    void init(int _n) {
	n=_n;
	t.resize(4*n);
	o.resize(4*n);
    }

    void push(int v) {
	t[2*v]+=o[v];
	t[2*v+1]+=o[v];
	o[2*v]+=o[v];
	o[2*v+1]+=o[v];
	o[v]=0;
    }

    ll qry(int v, int tl, int tr, int l, int r) {
	if (l>tr||r<tl) return -inf;
	if (l<=tl&&tr<=r) {
	    return t[v];
	} else {
	    push(v);
	    int tm=(tl+tr)/2;
	    return min(qry(2*v,tl,tm,l,r),qry(2*v+1,tm+1,tr,l,r));
	}
    }

    void rangeAdd(int v, int tl, int tr, int l, int r, ll dx) {
	if (l>r) return;
	if (l>tr||r<tl) return;
	if (l<=tl&&tr<=r) {
	    t[v]+=dx;
	    o[v]+=dx;
	} else {
	    push(v);
	    int tm=(tl+tr)/2;
	    rangeAdd(2*v,tl,tm,l,r,dx);
	    rangeAdd(2*v+1,tm+1,tr,l,r,dx);
	    t[v]=min(t[2*v],t[2*v+1]);
	}
    }
};

struct maxsegtree {
    int n;
    vector<ll> t,o;
    void init(int _n) {
	n=_n;
	t.resize(4*n);
	o.resize(4*n);
    }

    void push(int v) {
	t[2*v]+=o[v];
	t[2*v+1]+=o[v];
	o[2*v]+=o[v];
	o[2*v+1]+=o[v];
	o[v]=0;
    }

    ll qry(int v, int tl, int tr, int l, int r) {
	if (l>tr||r<tl) return -inf;
	if (l<=tl&&tr<=r) {
	    return t[v];
	} else {
	    push(v);
	    int tm=(tl+tr)/2;
	    return max(qry(2*v,tl,tm,l,r),qry(2*v+1,tm+1,tr,l,r));
	}
    }

    void rangeAdd(int v, int tl, int tr, int l, int r, ll dx) {
	if (l>r) return;
	if (l>tr||r<tl) return;
	if (l<=tl&&tr<=r) {
	    t[v]+=dx;
	    o[v]+=dx;
	} else {
	    push(v);
	    int tm=(tl+tr)/2;
	    rangeAdd(2*v,tl,tm,l,r,dx);
	    rangeAdd(2*v+1,tm+1,tr,l,r,dx);
	    t[v]=max(t[2*v],t[2*v+1]);
	}
    }
};


minsegtree tmin;
maxsegtree tmax;

int n;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);  cout.tie(0);

    cin>>n;
    tmin.init(n);
    tmax.init(n);
    for (int i=1; i<=n; i++) {
	int val,id;
	cin>>val>>id;
	if (id==1) {
	    tmin.rangeAdd(1,1,n,1,val,1);
	    tmax.rangeAdd(1,1,n,1,val,1);
	} else {
	    tmin.rangeAdd(1,1,n,1,val,-1);
	    tmax.rangeAdd(1,1,n,1,val,-1);
	}

	int lo = tmin.qry(1,1,n,1,n);
	int hi = tmax.qry(1,1,n,1,n);

	if (hi>0) {
	    if (lo>=0) cout<<">\n"; else cout<<"?\n";
	} else {
	    if (lo<=0) cout<<"<\n"; else assert(false);
	}
    }
    
    
    return 0;
}

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 0 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 1 ms 492 KB Output is correct
8 Correct 1 ms 492 KB Output is correct
9 Correct 1 ms 492 KB Output is correct
10 Correct 7 ms 1516 KB Output is correct
11 Correct 63 ms 7532 KB Output is correct
12 Correct 103 ms 11756 KB Output is correct
13 Correct 84 ms 13036 KB Output is correct
14 Correct 88 ms 13036 KB Output is correct
15 Correct 93 ms 13548 KB Output is correct
16 Correct 86 ms 13932 KB Output is correct
17 Correct 89 ms 13804 KB Output is correct
18 Correct 94 ms 13812 KB Output is correct
19 Correct 87 ms 13804 KB Output is correct
20 Correct 91 ms 13804 KB Output is correct
21 Correct 97 ms 13804 KB Output is correct
22 Correct 97 ms 13804 KB Output is correct
23 Correct 85 ms 13292 KB Output is correct
24 Correct 89 ms 13292 KB Output is correct
25 Correct 87 ms 13420 KB Output is correct