Submission #876919

#	Time	Username	Problem	Language	Result	Execution time	Memory
876919		marvinthang	Land of the Rainbow Gold (APIO17_rainbow)	C++17	100 / 100	358 ms	141384 KiB

rainbow

/*************************************
*    author: marvinthang             *
*    created: 22.11.2023 16:30:03    *
*************************************/
 
#include "rainbow.h"
#include <bits/stdc++.h>
 
using namespace std;
 
#define                  fi  first
#define                  se  second
#define                left  ___left
#define               right  ___right
#define                TIME  (1.0 * clock() / CLOCKS_PER_SEC)
#define             MASK(i)  (1LL << (i))
#define           BIT(x, i)  ((x) >> (i) & 1)
#define  __builtin_popcount  __builtin_popcountll
#define              ALL(v)  (v).begin(), (v).end()
#define           REP(i, n)  for (int i = 0, _n = (n); i < _n; ++i)
#define          REPD(i, n)  for (int i = (n); i-- > 0; )
#define        FOR(i, a, b)  for (int i = (a), _b = (b); i < _b; ++i) 
#define       FORD(i, b, a)  for (int i = (b), _a = (a); --i >= _a; ) 
#define       FORE(i, a, b)  for (int i = (a), _b = (b); i <= _b; ++i) 
#define      FORDE(i, b, a)  for (int i = (b), _a = (a); i >= _a; --i) 
#define        scan_op(...)  istream & operator >> (istream &in, __VA_ARGS__ &u)
#define       print_op(...)  ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
    #include "debug.h"
#else
    #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
    #define DB(...) 23
    #define db(...) 23
    #define debug(...) 23
#endif
 
template <class U, class V> scan_op(pair <U, V>)  { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>)  { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>)  { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")";  else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }
 
static char buf[1000 << 20];
void* operator new(size_t s) {
    static size_t i = sizeof buf;
    assert(s < i);
    return (void*)&buf[i -= s];
}
void operator delete(void*) {}
 
 
struct Node {
    int cnt;
    Node *left, *right;
    Node(int v = 0): cnt(v), left(nullptr), right(nullptr) {}
    Node(Node *l, Node *r) {
        left = l, right = r;
        cnt = l->cnt + r->cnt;
    }
};
 
Node* build(int l, int r) {
    if (r - l == 1) return new Node(0);
    int m = l + r >> 1;
    return new Node(build(l, m), build(m, r));
}
Node* upgrade(Node *cur, int l, int r, int p, int v) {
    if (r - l == 1) return new Node(cur->cnt + v);
    int m = l + r >> 1;
    if (p < m) return new Node(upgrade(cur->left, l, m, p, v), cur->right);
    return new Node(cur->left, upgrade(cur->right, m, r, p, v));
};
int get_sum(Node *p, Node *q, int l, int r, int u, int v) {
    if (l >= v || r <= u) return 0;
    if (u <= l && r <= v) return q->cnt - p->cnt;
    int m = l + r >> 1;
    return get_sum(p->left, q->left, l, m, u, v) + get_sum(p->right, q->right, m, r, u, v);
}
 
vector <Node *> drow, dcol, dsquare, dcell;
 
int R, C;
vector <vector <int>> rows, cols;
 
void init(int r, int c, int sr, int sc, int M, char *S) {
    R = r; C = c; --sr; --sc;
 
    rows.resize(R);
    cols.resize(C);
    drow.push_back(build(0, C));
    dcol.push_back(build(0, R));
    dsquare.push_back(drow[0]);
    dcell.push_back(drow[0]);
 
    rows[sr].push_back(sc);
    cols[sc].push_back(sr);
 
    REP(i, M) {
        if (S[i] == 'N') --sr;
        else if (S[i] == 'S') ++sr;
        else if (S[i] == 'W') --sc;
        else ++sc;
        rows[sr].push_back(sc);
        cols[sc].push_back(sr);
    }
    vector <bool> exist(C);
    REP(r, R) {
        if (r) {
            drow.push_back(drow.back());
            dsquare.push_back(dsquare.back());
        }
        dcell.push_back(dcell.back());
 
        sort(ALL(rows[r]));
        rows[r].erase(unique(ALL(rows[r])), rows[r].end());
        int last = -2;
        REP(i, rows[r].size()) {
            int c = rows[r][i];
            dcell.back() = upgrade(dcell.back(), 0, C, c, 1);
            int add = 0;
            if (exist[c]) {
                drow.back() = upgrade(drow.back(), 0, C, c, 1);
                if (last + 1 == c && exist[c - 1]) dsquare.back() = upgrade(dsquare.back(), 0, C, c, -1);
            } else {
                if (c && last + 1 != c && exist[c - 1]) dsquare.back() = upgrade(dsquare.back(), 0, C, c, +1);
                if (c + 1 < C && exist[c + 1] && (i + 1 == (int) rows[r].size() || rows[r][i + 1] != c + 1)) 
                    dsquare.back() = upgrade(dsquare.back(), 0, C, c + 1, +1);
            }
            last = c;
        }
        if (r) for (int c: rows[r - 1]) exist[c] = false;
        for (int c: rows[r]) exist[c] = true;
 
    }
    exist.assign(R, false);
    REP(c, C) {
        if (c) dcol.push_back(dcol.back());
        sort(ALL(cols[c]));
        cols[c].erase(unique(ALL(cols[c])), cols[c].end());
        for (int r: cols[c]) if (exist[r]) dcol.back() = upgrade(dcol.back(), 0, R, r, 1);
        if (c) for (int r: cols[c - 1]) exist[r] = false;
        for (int r: cols[c]) exist[r] = true;
    }
}
 
bool exist(int x, int y) {
    return binary_search(ALL(rows[x]), y);
}
 
int colour(int ar, int ac, int br, int bc) {
    --ar; --ac; --br; --bc;
    int cnt_cell = get_sum(dcell[ar], dcell[br + 1], 0, C, ac, bc + 1);
    if (!cnt_cell) return 1;
    int cnt_border = 0;
    int res = 1 - exist(ar, ac) - exist(ar, bc) - exist(br, ac) - exist(br, bc);
    res += get_sum(drow[ar], drow[br], 0, C, ac, bc + 1);
    res += get_sum(dcol[ac], dcol[bc], 0, R, ar, br + 1);
    for (int c: {ac, bc}) {
        cnt_border += upper_bound(ALL(cols[c]), br) - lower_bound(ALL(cols[c]), ar);
        res -= get_sum(drow[ar], drow[br], 0, C, c, c + 1);
    }
    for (int r: {ar, br}) {
        cnt_border += upper_bound(ALL(rows[r]), bc) - lower_bound(ALL(rows[r]), ac);
        res -= get_sum(dcol[ac], dcol[bc], 0, R, r, r + 1);
    }
    res += get_sum(dsquare[ar], dsquare[br], 0, C, ac + 1, bc + 1);
    return cnt_border - cnt_cell + res + !cnt_border;
}

Compilation message (stderr)

rainbow.cpp: In function 'Node* build(int, int)':
rainbow.cpp:65:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   65 |     int m = l + r >> 1;
      |             ~~^~~
rainbow.cpp: In function 'Node* upgrade(Node*, int, int, int, int)':
rainbow.cpp:70:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   70 |     int m = l + r >> 1;
      |             ~~^~~
rainbow.cpp: In function 'int get_sum(Node*, Node*, int, int, int, int)':
rainbow.cpp:77:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   77 |     int m = l + r >> 1;
      |             ~~^~~
rainbow.cpp: In function 'void init(int, int, int, int, int, char*)':
rainbow.cpp:121:17: warning: unused variable 'add' [-Wunused-variable]
  121 |             int add = 0;
      |                 ^~~

• Subtask 1: 11 / 11
• Subtask 2: 12 / 12
• Subtask 3: 24 / 24
• Subtask 4: 27 / 27
• Subtask 5: 26 / 26