Submission #637482

#	Time	Username	Problem	Language	Result	Execution time	Memory
637482		Ez0zIOVgTsSgT	Wall (IOI14_wall)	C++14	0 / 100	1 ms	212 KiB

wall

#include "wall.h"
#include<bits/stdc++.h>
using namespace std;

void DBG() { cerr << "]\n"; }
template<class H, class... T> void DBG(H h, T... t) {
    cerr << h; if(sizeof...(t)) cerr << ", ";
    DBG(t...);
}
#ifdef LOCAL
#define dbg(...) cerr << "[" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif // LOCAL

#define FOR(i,a,b) for(int i = (a) ; i<(b) ; i++)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for(int i = (b)-1 ; i>=(a) ; i--)
#define R0F(i,a) ROF(i,0,a)
#define each(e,a) for(auto &e : (a))
#define sz(v) (int)(v).size()
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pb push_back
#define tcT template<class T
#define nl "\n"
#define fi first
#define se second

using ll = long long;
using vi = vector<int>;
using pi = pair<int,int>;
using str = string;
tcT> using V = vector<T>;
tcT> using pqg = priority_queue<T,vector<T>,greater<T>>;

void setIO(string NAME = "") {
    cin.tie(0)->sync_with_stdio(0);
    if(sz(NAME)) {
        freopen((NAME + ".inp").c_str(),"r",stdin);
        freopen((NAME + ".out").c_str(),"w",stdout);
    }
}

tcT> bool ckmin(T&a, const T&b) {
    return b < a ? a=b,1 : 0; }
tcT> bool ckmax(T&a, const T&b) {
    return b > a ? a=b,1 : 0; }

const int MOD = 1e9 + 7;

struct Dat {
    int mn, mx;
};

struct SegTree {
    int N;
    V<Dat> seg, lazy;
    vi ans;
    void init(int _N) {
        N = _N;
        seg.assign(N*4 + 7, {0,0});
        lazy.assign(N*4 + 7, {0,0});
        ans.assign(N+5, 0);
    }
    void proc_add(int ind, int val) {
        ckmax(seg[ind].mn, val);
        ckmax(seg[ind].mx, val);
        ckmax(lazy[ind].mn, val);
        ckmax(lazy[ind].mx, val);
    }
    void proc_rem(int ind, int val) {
        ckmin(seg[ind].mn, val);
        ckmin(seg[ind].mx, val);
        ckmin(lazy[ind].mn, val);
        ckmin(lazy[ind].mx, val);
    }
    void push(int ind) {
        if(lazy[ind].mx != -MOD) {
            F0R(i, 2) proc_add(ind*2 + i, lazy[ind].mx);
        }
        if(lazy[ind].mn != MOD) {
            F0R(i, 2) proc_rem(ind*2 + i, lazy[ind].mn);
        }
        lazy[ind] = {MOD, -MOD};
    }
    void pull(int ind) {
        seg[ind].mn = min(seg[ind<<1].mn, seg[ind<<1|1].mn);
        seg[ind].mx = max(seg[ind<<1].mx, seg[ind<<1|1].mx);
    }
    void upd(int op, int l, int r, int val, int ind, int L, int R) {
        if(L > r || R < l) return;
        if(l <= L && R <= r) {
            if(op == 1) proc_add(ind, val);
            else proc_rem(ind, val);
            return;
        }
        push(ind);
        int mid = (L + R) >> 1;
        upd(op, l, r, val, ind<<1, L, mid);
        upd(op, l, r, val, ind<<1|1, mid+1, R);
        pull(ind);
    }
    void upd(int op, int l, int r, int val) {
        upd(op, l, r, val, 1, 1, N);
    }
    void calc(int ind, int L, int R) {
        if(L == R) ans[L] = seg[ind].mn;
        else {
            push(ind);
            int mid = (L + R) >> 1;
            calc(ind<<1, L, mid);
            calc(ind<<1|1, mid+1, R);
        }
    }
    void calc() {
        calc(1, 1, N);
    }
};

SegTree st;

void buildWall(int N, int K, int op[], int left[], int right[], int height[], int finalHeight[]) {
    st.init(N);
    F0R(i, K) {
        st.upd(op[i], left[i]+1, right[i]+1, height[i]);
    }
    st.calc();
    FOR(i,1,N+1) finalHeight[i] = st.ans[i];
}

Compilation message (stderr)

wall.cpp: In function 'void setIO(std::string)':
wall.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen((NAME + ".inp").c_str(),"r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
wall.cpp:41:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         freopen((NAME + ".out").c_str(),"w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 24
• Subtask 3: 0 / 29
• Subtask 4: 0 / 39