Submission #1094502

#	Time	Username	Problem	Language	Result	Execution time	Memory
1094502		anhthi	Wall (IOI14_wall)	C++14	100 / 100	413 ms	89168 KiB

wall

#include <bits/stdc++.h>

using namespace std;

#define fi first
#define se second
#define ll long long
#define mp(x, y) make_pair(x, y)
#define sz(v) ((int) (v).size())
#define all(v) (v).begin(), (v).end()
#define MASK(i) (1LL << (i))
#define BIT(x, y) (((x) >> (y)) & 1)
#define pb push_back
#define max_rng *max_element
#define min_rng *min_element
#define rep(i, n) for(int i = 1, _n = (n); i <= _n; ++i)
#define forn(i, a, b) for(int i = (a), _b = (b); i <= _b; ++i)
#define ford(i, a, b) for(int i = (a), _b = (b); i >= _b; --i)

template <class X, class Y>
    inline bool maximize(X &x, Y y) {
        return (x < y ? x = y, true : false);
    }

template <class X, class Y>
    inline bool minimize(X &x, Y y) {
        return (x > y ? x = y, true : false);
    }

template <class X>
    inline void compress(vector<X> &a) {
        sort(all(a));
        a.resize(unique(all(a)) - a.begin());
    }

int ctz(ll x) { return __builtin_ctzll(x); }
int lg(ll x) { return 63 - __builtin_clzll(x); }
int popcount(ll x) { return __builtin_popcount(x); }

mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) {
    return l + abs((ll) rng()) % (r - l + 1);
}

const ll oo = (ll) 1e17;
const int inf = (ll) 2e9 + 7, mod = (ll) 998244353;

const int mxn = 2e5 + 5, LOG = 18;

void add(int &x, int y) { x += y; if (x >= mod) x -= mod; }
void sub(int &x, int y) { x -= y; if (x < 0) x += mod; }

struct Seg {

    int n;
    vector<pair<int, int>> st;

    Seg(int n) : n(n) {
        st.resize(n << 2);
    }

    void setNode(int i, pair<int, int> val) {
        if (st[i].first > val.second) st[i] = mp(val.second, val.second);
        else if (st[i].second < val.first) st[i] = mp(val.first, val.first);
        else {
            st[i] = mp(max(st[i].first, val.first), min(st[i].second, val.second));
        }
    }

    void down(int i) {
        if (st[i] == mp(-inf, inf))
            return;
        setNode(2 * i, st[i]);
        setNode(2 * i + 1, st[i]);
        st[i] = mp(-inf, inf);
    }

    void upd(int i, int l, int r, int u, int v, pair<int, int> val) {
        if (l > v || r < u) return;
        if (l >= u && r <= v) return setNode(i, val);
        down(i);
        int m = (l + r) >> 1;
        upd(2 * i, l, m, u, v, val);
        upd(2 * i + 1, m + 1, r, u, v, val);
    }

    void upd(int u, int v, pair<int, int> val) {
        return upd(1, 0, n - 1, u, v, val);
    }

    void dfs(int i, int l, int r, int ans[]) {
        if (l == r) {
            ans[l] = st[i].first;
            return;
        }
        down(i);
        int m = (l + r) >> 1;
        dfs(2 * i, l, m, ans);
        dfs(2 * i + 1, m + 1, r, ans);
    }
    void dfs(int ans[]) { return dfs(1, 0, n - 1, ans); }
};

void buildWall(int n, int k, int op[], int L[], int R[], int H[], int ans[]){
    Seg s(n);
    forn(i, 0, k - 1) {
        int l = L[i];
        int r = R[i];
        int h = H[i];
        if (op[i] == 1)
            s.upd(l, r, mp(h, inf));
        else s.upd(l, r, mp(-inf, h));
    }
    s.dfs(ans);
    return;
}

//int main(void) {
//
//    ios_base::sync_with_stdio(0);
//    cin.tie(0); cout.tie(0);
//
//    #define TASK "task"
//    if (fopen(TASK".inp", "r")) {
//        freopen(TASK".inp", "r", stdin);
//        freopen(TASK".out", "w", stdout);
//    }
//
//    int n = 10, k = 6;
//    int op[] = {1, 2, 2, 1, 1, 2};
//    int L[] = {1, 4, 3, 0, 2, 6};
//    int R[] = {8, 9, 6, 5, 2, 7};
//    int H[] = {4, 1, 5, 3, 5, 0};
//
//    int ans[n];
//    memset(ans, 0, sizeof ans);
//    buildWall(n, k, op, L, R, H, ans);
//
//    forn(i, 0, n - 1) cout << ans[i] << ' ';
//
//    return 0;
//}

• Subtask 1: 8 / 8
• Subtask 2: 24 / 24
• Subtask 3: 29 / 29
• Subtask 4: 39 / 39