Submission #1086166

#	Time	Username	Problem	Language	Result	Execution time	Memory
1086166		TrinhKhanhDung	Weighting stones (IZhO11_stones)	C++14	100 / 100	42 ms	5496 KiB

stones

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define sz(x) (int)x.size()
#define ALL(v) v.begin(),v.end()
#define MASK(k) (1LL << (k))
#define BIT(x, i) (((x) >> (i)) & 1)
#define oo (ll)1e18
#define INF (ll)1e9
#define MOD (ll)(998244353)
 
using namespace std;
 
template<class T1, class T2>
    bool maximize(T1 &a, T2 b){if(a < b){a = b; return true;} return false;}
 
template<class T1, class T2>
    bool minimize(T1 &a, T2 b){if(a > b){a = b; return true;} return false;}
 
template<class T1, class T2>
    void add(T1 &a, T2 b){a += b; if(a >= MOD) a -= MOD;}
 
template<class T1, class T2>
    void sub(T1 &a, T2 b){a -= b; if(a < 0) a += MOD;}
 
template<class T>
    void cps(T &v){sort(ALL(v)); v.resize(unique(ALL(v)) - v.begin());}
 
struct seg{
    vector<int> ma, mi, laz;
    int n;
 
    seg(int _n = 0){
        n = _n;
        ma.resize(n * 4 + 3, 0);
        mi.resize(n * 4 + 3, 0);
        laz.resize(n * 4 + 3, 0);
    }
 
    void push(int i){
        ma[i * 2] += laz[i];
        ma[i * 2 + 1] += laz[i];
        mi[i * 2] += laz[i];
        mi[i * 2 + 1] += laz[i];
        laz[i * 2] += laz[i];
        laz[i * 2 + 1] += laz[i];
        laz[i] = 0;
    }
 
    void upd(int i, int l, int r, int u, int v, int c){
        if(r < u || v < l) return;
        if(u <= l && r <= v){
            ma[i] += c;
            mi[i] += c;
            laz[i] += c;
            return;
        }
        push(i);
        int m = (l + r) >> 1;
        upd(i * 2, l, m, u, v, c);
        upd(i * 2 + 1, m + 1, r, u, v, c);
        mi[i] = min(mi[i * 2], mi[i * 2 + 1]);
        ma[i] = max(ma[i * 2], ma[i * 2 + 1]);
    }
 
    void upd(int u, int v, int c){
        upd(1, 1, n, u, v, c);
    }
};
 
void solve(){
    int n;
    cin >> n;
 
    seg it(n);
    while(n--){
        int a, b;
        cin >> a >> b;
        if(b == 1){
            it.upd(1, a, -1);
        }
        else{
            it.upd(1, a, 1);
        }
 
        int ma = it.ma[1], mi = it.mi[1];
 
        if(ma > 0 && mi < 0)
            cout << "?\n";
        else if(ma <= 0)
            cout << ">\n";
        else
            cout << "<\n";
    }
}
 
int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
//    freopen("numtable.inp","r",stdin);
//    freopen("numtable.out","w",stdout);
 
    solve();
 
    return 0;
}

• Subtask 1: 100 / 100