oj.uz

Submission #881952

# Submission time Handle Problem Language Result Execution time Memory
881952 2023-12-02T10:13:34 Z noyancanturk Weighting stones (IZhO11_stones) C++17
100 / 100
 42 ms 10372 KB 
#ifndef Local
    #pragma GCC optimize("O3,unroll-loops")
    const int lim=1e5+100;
#else
    const int lim=3e3;
#endif

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define pb push_back

const int mod=1e9+7;
using pii=pair<int,int>;

struct segtree{
    int n,lazy[4*lim];
    pii tree[4*lim];
    segtree(int n):n(n){
        memset(lazy,0,sizeof(lazy));
        fill(tree,tree+4*lim,pii{0,0});
    }
    void push(int node,int l,int r){
        if(!lazy[node])return;
        tree[node].first+=lazy[node];
        tree[node].second+=lazy[node];
        if(l^r){
            int child=node<<1;
            lazy[child]+=lazy[node];
            lazy[child|1]+=lazy[node];
        }
        lazy[node]=0;
    }
    int L,R,VAL;
    pii merge(pii v1,pii v2){
        return pii{min(v1.first,v2.first),max(v1.second,v2.second)};
    }
    pii update(int l,int r,int node){
        push(node,l,r);
        if(r<L||R<l){
            return tree[node];
        }
        if(L<=l&&r<=R){
            lazy[node]+=VAL;
            push(node,l,r);
            return tree[node];
        }
        int mid=(l+r)>>1,child=node<<1;
        return tree[node]=merge(update(l,mid,child),update(mid+1,r,child|1));
    }
    void Update(int l,int r,int val){
        L=l,R=r,VAL=val;
        update(1,n,1);
    }
};

void solve(){
    int n;
    cin>>n;
    segtree a(n);
    for(int i=0;i<n;i++){
        int v,s;
        cin>>v>>s;
        a.Update(1,v,s==1?1:-1);
        if(a.tree[1].first<0&&0<a.tree[1].second){
            cout<<"?\n";
        }else if(a.tree[1].first<0){
            cout<<"<\n";
        }else{
            cout<<">\n";
        }
    }
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
#ifdef Local  
    freopen(".in","r",stdin);
    freopen(".out","w",stdout);
#else
    //freopen(".in","r",stdin);
    //freopen(".out","w",stdout);
#endif
    int t=1;
    //cin>>t;
    while (t--)
    {
        solve();
    }
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 9820 KB Output is correct
2 Correct 5 ms 9680 KB Output is correct
3 Correct 5 ms 9816 KB Output is correct
4 Correct 5 ms 9820 KB Output is correct
5 Correct 5 ms 9812 KB Output is correct
6 Correct 6 ms 9820 KB Output is correct
7 Correct 5 ms 9820 KB Output is correct
8 Correct 5 ms 9820 KB Output is correct
9 Correct 7 ms 9820 KB Output is correct
10 Correct 8 ms 9820 KB Output is correct
11 Correct 29 ms 10144 KB Output is correct
12 Correct 41 ms 9820 KB Output is correct
13 Correct 35 ms 10072 KB Output is correct
14 Correct 32 ms 10372 KB Output is correct
15 Correct 34 ms 9936 KB Output is correct
16 Correct 34 ms 9816 KB Output is correct
17 Correct 41 ms 9940 KB Output is correct
18 Correct 38 ms 10092 KB Output is correct
19 Correct 33 ms 9820 KB Output is correct
20 Correct 34 ms 9820 KB Output is correct
21 Correct 42 ms 9948 KB Output is correct
22 Correct 36 ms 9944 KB Output is correct
23 Correct 36 ms 9816 KB Output is correct
24 Correct 34 ms 10000 KB Output is correct
25 Correct 33 ms 9816 KB Output is correct