#ifdef ONLINE_JUDGE
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math,O3")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#endif
#include <bits/stdc++.h>
#define speed \
ios_base::sync_with_stdio(0); \
cin.tie(0); \
cout.tie(0);
#define precision \
cout.precision(30); \
cerr.precision(10);
#define ll long long
#define ld long double
#define pb(x) push_back(x)
#define sz(x) (int)x.size()
#define mp(x, y) make_pair(x, y)
#define all(x) x.begin(), x.end()
#define pc(x) __builtin_popcount(x)
#define pcll(x) __builtin_popcountll(x)
#define F first
#define S second
using namespace std;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
void ioi(string name) {
freopen((name + ".in").c_str(), "r", stdin);
freopen((name + ".out").c_str(), "w", stdout);
}
int q, g, n, m, h[100005];
set<int> a, b, A, B;
void lol() {
while (sz(A) && sz(B)) {
int v = *prev(A.end());
a.insert(v);
A.erase(v);
h[v]++;
v = *prev(B.end());
b.insert(v);
B.erase(v);
h[v]--;
}
}
void add(int x) {
n++;
A.insert(x);
lol();
while (sz(a) && sz(A) && (*a.begin() < *prev(A.end()))) {
int v = *a.begin();
a.erase(v);
A.insert(v);
h[v]--;
v = *prev(A.end());
a.insert(v);
A.erase(v);
h[v]++;
}
}
void dda(int x) {
m++;
B.insert(x);
lol();
while (sz(b) && sz(B) && (*b.begin() < *prev(B.end()))) {
int v = *b.begin();
b.erase(v);
B.insert(v);
h[v]++;
v = *prev(B.end());
b.insert(v);
B.erase(v);
h[v]--;
}
}
int get() {
int x = 1, y = 1, s = 0;
for (int i = g; i >= 1; i--) {
s += h[i];
x &= (0 <= s);
y &= (s <= 0);
}
if (!x && !y) return -1;
if (x && y) return n > m;
if (x && n != max(n, m)) return -1;
if (y && m != max(n, m)) return -1;
return x;
}
int main() {
speed;
precision;
// code
cin >> q;
g = q;
while (q--) {
int x, y;
cin >> x >> y;
if (y < 2)
add(x);
else
dda(x);
x = get();
if (x < 0)
cout << "?\n";
else
cout << (x ? ">\n" : "<\n");
}
// endl
#ifndef ONLINE_JUDGE
cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << " s.\n";
#endif
return 0;
}
Compilation message
stones.cpp: In function 'void ioi(std::string)':
stones.cpp:26:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
26 | freopen((name + ".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stones.cpp:27:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
27 | freopen((name + ".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
332 KB |
Output is correct |
| 2 |
Correct |
1 ms |
332 KB |
Output is correct |
| 3 |
Correct |
1 ms |
332 KB |
Output is correct |
| 4 |
Correct |
1 ms |
204 KB |
Output is correct |
| 5 |
Correct |
1 ms |
332 KB |
Output is correct |
| 6 |
Correct |
1 ms |
332 KB |
Output is correct |
| 7 |
Correct |
2 ms |
324 KB |
Output is correct |
| 8 |
Correct |
3 ms |
332 KB |
Output is correct |
| 9 |
Correct |
3 ms |
332 KB |
Output is correct |
| 10 |
Correct |
92 ms |
760 KB |
Output is correct |
| 11 |
Execution timed out |
1089 ms |
1644 KB |
Time limit exceeded |
| 12 |
Halted |
0 ms |
0 KB |
- |
