Coins

#include <bits/stdc++.h>

using namespace std;

struct seg{
    const int pn = 1<<4;
    vector<int> p;
    void init(){
        p = vector<int>(2*pn, 0);
    }
    void set(int i){
        i+=pn;
        p[i] = 1;
        i/=2;
        while(i > 0){
            p[i] = p[2*i]+p[2*i+1];
            i/=2;
        }
    }
    
    int get(int i, int a, int b, int l, int r){
       // cout << i << " " << a << " " << b << " " << l << " " << r << endl;
        if(i >= 2*pn || b <= l || a >= r){
            //cout << "r1" << endl;
            return 0;
        }
        if(l >= a && r <= b){
           // cout << "r2" << endl;
            return p[i];
        }
        //cout << "r3" << endl;
        return get(i*2, a, b, l, (l+r)/2) + get(i*2+1, a, b, (l+r)/2, b);
    }
    int get2(int a, int b){
        return get(1, a, b, 0, pn);
    }
};
int main(){
    int n; cin >> n;
    
    seg p1, p2;
    p1.init();
    p2.init();
    int s1 = 0, s2 = 0;
    int ma1 = 0, ma2 = 0;
    for(int i = 0; i < n; ++i){
        int c, s; cin >> c >> s;
        if(s == 1){
            p1.set(c);
            ++s1;
            ma1 = max(ma1, c);
        }
        else{
            p2.set(c);
            ++s2;
            ma2 = max(ma2, c);
        }
        int su1 = p1.get2(ma2, n+1);
        int su2 = p2.get2(ma1, n+1);
        if(su1 >= s2)
            cout << ">" << endl;
        else if(su2 >= s1)
            cout << "<" << endl;
        else
            cout << "?" << endl;
    }
    
    return 0;
}

/*
 * int mi1 = 1000000000, mi2 = 1000000000;
    int ma1 = 0, ma2 = 0;
    int s1 = 0, s2 = 0;
    for(int i = 0; i < n; ++i){
        int c, s; cin >> c >> s;
        
        if(s == 1){
            s1++;
            mi1 = min(mi1, c);
            ma1 = max(ma1, c);
        }
        else{
            s2++;
            mi2 = min(mi2, c);
            ma2 = max(ma2, c);
        }
        if(s1 >= s2 && mi1 >= ma2)
            cout << ">" << endl;
        else if(s2 >= s1 && mi2 >= ma1)
            cout << "<" << endl;
        else
            cout << "?" << endl;
    }*/

Test 1

Verdict: RUNTIME ERROR

Test 2

Verdict: RUNTIME ERROR

Test 3

Verdict: RUNTIME ERROR

Test 4

Verdict: RUNTIME ERROR

Test 5

Verdict: RUNTIME ERROR