Submission #764541

#	Time	Username	Problem	Language	Result	Execution time	Memory
764541		Trunkty	Weighting stones (IZhO11_stones)	C++14	100 / 100	38 ms	7456 KiB

stones

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define int ll

int n;

//

int sumi[400020],maxi[400020],mini[400020];

void update(int node, int l, int r, int pos, int val){
    if(l==r){
        sumi[node] = val;
        maxi[node] = val;
        mini[node] = val;
    }
    else{
        int mid = (l+r)/2;
        if(pos<=mid){
            update(node*2,l,mid,pos,val);
        }
        else{
            update(node*2+1,mid+1,r,pos,val);
        }
        sumi[node] = sumi[node*2]+sumi[node*2+1];
        mini[node] = min(mini[node*2+1],mini[node*2]+sumi[node*2+1]);
        maxi[node] = max(maxi[node*2+1],maxi[node*2]+sumi[node*2+1]);
    }
}

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n;
    for(int i=1;i<=n;i++){
        int a,b;
        cin >> a >> b;
        if(b==1){
            update(1,1,n,a,1);
        }
        else{
            update(1,1,n,a,-1);
        }
        if(mini[1]>=0){
            cout << ">" << "\n";
        }
        else if(maxi[1]<=0){
            cout << "<" << "\n";
        }
        else{
            cout << "?" << "\n"; 
        }
    }
    return 0;
}

• Subtask 1: 100 / 100