#include "bits/stdc++.h"
using namespace std;
#define int long long
#define FOR(i, l, r) for(int i = l; i < r; i++)
#define snd second
#define fst first
#define pb push_back
typedef vector<int> vi;
typedef pair<int, int> ii;
typedef vector<ii> vii;
vi tmin, tmax, lazy;
int N;
void update(int l, int r, int v, int lb, int rb, int n = 1){
//cout << lb << " " << rb << " " << n << endl;
if(l <= lb and rb <= r){
lazy[n] += v; tmin[n] += v; tmax[n] += v;
return;
}
int mb = (lb+rb)/2;
if(lazy[n] != 0){
update(lb, rb, lazy[n], lb, mb, n<<1);
update(lb, rb, lazy[n], mb, rb, n<<1|1);
lazy[n] = 0;
}
if(l < mb) update(l, r, v, lb, mb, n<<1);
if(r > mb) update(l, r, v, mb, rb, n<<1|1);
tmin[n] = min(tmin[2*n], tmin[2*n+1]);
tmax[n] = max(tmax[2*n], tmax[2*n+1]);
}
signed main(){
cin >> N;
//N = 100;
tmin.assign(4*N+5, 0);
tmax.assign(4*N+5, 0);
lazy.assign(4*N+5, 0);
/*update(0, 10, 2, 0, N);
update(2, 20, -1, 0, N);
update(0, 10, 2, 0, N);
cout << tmin[1] << endl;
cout << tmax[1] << endl;*/
FOR(i, 0, N){
int R, S;
cin >> R >> S;
update(0, R+1, 2*S-3, 0, N);
//cout << tmin[1] << " " << tmax[1] << endl;
if(tmin[1] <= 0 and tmax[1] <= 0) cout << ">" << endl;
else if(tmin[1] >= 0 and tmax[1] >= 0) cout << "<" << endl;
else cout << "?" << endl;
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
376 KB |
Output is correct |
| 2 |
Correct |
2 ms |
376 KB |
Output is correct |
| 3 |
Correct |
3 ms |
472 KB |
Output is correct |
| 4 |
Incorrect |
2 ms |
528 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
