Submission #646968

#	Time	Username	Problem	Language	Result	Execution time	Memory
646968		dxz05	Segments (IZhO18_segments)	C++14	16 / 100	253 ms	19600 KiB

segments

//#pragma GCC optimize("Ofast,O2,O3,unroll-loops")
//#pragma GCC target("avx2")

#include <bits/stdc++.h>

using namespace std;

void debug_out() { cerr << endl; }

template<typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
    cerr << "[" << H << "]";
    debug_out(T...);
}

#ifdef dddxxz
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

#define SZ(s) ((int)s.size())
#define all(x) (x).begin(), (x).end()
#define lla(x) (x).rbegin(), (x).rend()
#define bpc(x) __builtin_popcount(x)
#define bpcll(x) __builtin_popcountll(x)
#define MP make_pair

clock_t startTime;

int getCurrentTime() {
    return int((double) (clock() - startTime) / CLOCKS_PER_SEC * 1000);
}

mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

typedef long long ll;
const int MOD = 1e9 + 7;
const int INF = 1000000101;
const long long LLINF = 1223372000000000555;
const int N = 2e6 + 3e2;
const int M = 5555;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

template<typename T> using indexed_multiset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;

indexed_multiset<pair<int, int>> lfs, rgs;

multiset<pair<int, int>> seg;
vector<pair<int, int>> vec_seg;

void add(int l, int r, int id){
    seg.insert(MP(l, r));
    vec_seg.emplace_back(l, r);
    lfs.insert(MP(l, id));
    rgs.insert(MP(r, id));
}

void del(int l, int r, int id){
    seg.erase(seg.find(MP(l, r)));
    lfs.erase(lfs.find(MP(l, id)));
    rgs.erase(rgs.find(MP(r, id)));
}

int intersects(int l, int r){
    int res = (int)seg.size();

    int strictly_left = rgs.order_of_key(MP(l, 0)); // number of right-points with < l
    int strictly_right = lfs.size() - lfs.order_of_key(MP(r + 1, 0)); // number of left-points with > r

    return res - strictly_left - strictly_right;
}

void solve(int TC){
    int n, t;
    cin >> n >> t;

    int lastans = 0;

    int next_id = 0;
    while (n--){
        int op;
        cin >> op;
        if (op == 1){
            int l, r;
            cin >> l >> r;

            l ^= (t * lastans);
            r ^= (t * lastans);
            if (l > r) swap(l, r);

            add(l, r, next_id);
            next_id++;

            debug('+', l, r);
        }
        if (op == 2){
            int id;
            cin >> id;
            --id;
            int l = vec_seg[id].first, r = vec_seg[id].second;
            del(l, r, id);

            debug('-', l, r);
        }
        if (op == 3){
            int l, r, k;
            cin >> l >> r >> k;

            l ^= (t * lastans);
            r ^= (t * lastans);
            if (l > r) swap(l, r);

            int ans = intersects(l, r);

            cout << ans << endl;

            lastans = ans;

            debug('?', l, r);
        }
    }

}

int main() {
    startTime = clock();
    ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);

#ifdef dddxxz
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    int TC = 1;
    //cin >> TC;

    for (int test = 1; test <= TC; test++) {
        //debug(test);
        //cout << "Case #" << test << ": ";
        solve(test);
    }

#ifdef dddxxz
    cerr << endl << "Time: " << getCurrentTime() << " ms" << endl;
#endif

    return 0;
}

Compilation message (stderr)

segments.cpp: In function 'void solve(int)':
segments.cpp:19:20: warning: statement has no effect [-Wunused-value]
   19 | #define debug(...) 42
      |                    ^~
segments.cpp:98:13: note: in expansion of macro 'debug'
   98 |             debug('+', l, r);
      |             ^~~~~
segments.cpp:19:20: warning: statement has no effect [-Wunused-value]
   19 | #define debug(...) 42
      |                    ^~
segments.cpp:107:13: note: in expansion of macro 'debug'
  107 |             debug('-', l, r);
      |             ^~~~~
segments.cpp:19:20: warning: statement has no effect [-Wunused-value]
   19 | #define debug(...) 42
      |                    ^~
segments.cpp:123:13: note: in expansion of macro 'debug'
  123 |             debug('?', l, r);
      |             ^~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 15
• Subtask 3: 16 / 16
• Subtask 4: 0 / 17
• Subtask 5: 0 / 20
• Subtask 6: 0 / 25