Submission #639804

#	Time	Username	Problem	Language	Result	Execution time	Memory
639804		ghostwriter	Paint By Numbers (IOI16_paint)	C++14	100 / 100	349 ms	44840 KiB

paint

#include "paint.h"
#include <cstdlib>
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include <debug.h>
#include "grader.cpp"
#endif
#define st first
#define nd second
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
template<typename T> T gcd(T a, T b) { return (b == 0? a : gcd(b, a % b)); }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
#define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
#define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
#define EACH(i, x) for (auto &(i) : (x))
#define WHILE while
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
    Tran The Bao
    CTL - Da Lat
    Cay ngay cay dem nhung deo duoc cong nhan
*/
const int N = 2e5 + 5;
const int K = 105;
int n, k, a[N], f[N];
str s;
vi c;
bool d[N][K], d1[N][K], check[N][2];
std::string solve_puzzle(std::string s, std::vector<int> c) {
    n = sz(s);
    k = sz(c);
    s = "#" + s + "#";
    vi c1;
    c1.pb(0);
    EACH(i, c) c1.pb(i);
    c1.pb(0);
    c = c1;
    ::s = s;
    ::c = c;
    FOR(i, 1, n) f[i] = f[i - 1] + (s[i] == '_'? 1 : 0);
    d[0][0] = 1;
    FOR(i, 1, n)
    FOR(j, 0, k) {
        if (s[i] == '_') {
            d[i][j] = d[i - 1][j];
            continue;
        }
        if (s[i] == 'X') {
            if (!j) {
                d[i][j] = 0;
                continue;
            }
            if (c[j] > i || f[i] - f[i - c[j]] || s[i - c[j]] == 'X') {
                d[i][j] = 0;
                continue;
            }
            d[i][j] = (i - c[j] - 1 >= 0? d[i - c[j] - 1][j - 1] : j == 1? 1 : 0);
            continue;
        }
        d[i][j] = d[i - 1][j];
        if (j && c[j] <= i && f[i] - f[i - c[j]] == 0 && s[i - c[j]] != 'X')
            d[i][j] = d[i][j] || (i - c[j] - 1 >= 0? d[i - c[j] - 1][j - 1] : j == 1? 1 : 0);
    }
    d1[n + 1][k + 1] = 1;
    FOS(i, n, 1)
    FOS(j, k + 1, 1) {
        if (s[i] == '_') {
            d1[i][j] = d1[i + 1][j];
            continue;
        }
        if (s[i] == 'X') {
            if (j > k) {
                d1[i][j] = 0;
                continue;
            }
            if (c[j] > n - i + 1 || f[i + c[j] - 1] - f[i - 1] || s[i + c[j]] == 'X') {
                d1[i][j] = 0;
                continue;
            }
            d1[i][j] = (i + c[j] + 1 <= n + 1? d1[i + c[j] + 1][j + 1] : j == k? 1 : 0);
            continue;
        }
        d1[i][j] = d1[i + 1][j];
        if (j <= k && c[j] <= n - i + 1 && f[i + c[j] - 1] - f[i - 1] == 0 && s[i + c[j]] != 'X')
            d1[i][j] = d1[i][j] || (i + c[j] + 1 <= n + 1? d1[i + c[j] + 1][j + 1] : j == k? 1 : 0);
    }
    FOR(i, 1, n) {
        if (s[i] != '.') {
            if (s[i] == '_') check[i][0] = 1;
            else check[i][1] = 1;
            continue;
        }
        bool ok = 0;
        FOR(j, 0, k) ok = ok || (d[i - 1][j] && d1[i + 1][j + 1]);
        check[i][0] = ok;
    }
    FOR(i, 1, k)
    FOR(j, 1, n - c[i] + 1) {
        if (f[j + c[i] - 1] - f[j - 1]) continue;
        if (s[j - 1] == 'X' || s[j + c[i]] == 'X') continue;
        bool ok = (j > 1? d[j - 2][i - 1] : i - 1 == 0? 1 : 0) && (j + 1 + c[i] <= n + 1? d1[j + 1 + c[i]][i + 1] : i == k? 1 : 0);
        if (ok) {
            ++a[j];
            --a[j + c[i]];
        }
    }
    FOR(i, 1, n) a[i] += a[i - 1];
    FOR(i, 1, n) {
        if (s[i] != '.') continue;
        if (a[i]) check[i][1] = 1;
    }
    str ans;
    FOR(i, 1, n)
        if (check[i][0] && check[i][1]) ans.pb('?');
        else if (check[i][0]) ans.pb('_');
        else ans.pb('X');
    return ans;
}
/*
.X........
1
3
*/

Compilation message (stderr)

paint.cpp: In function 'std::string solve_puzzle(std::string, std::vector<int>)':
paint.cpp:29:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   29 | #define EACH(i, x) for (auto &(i) : (x))
      |                               ^
paint.cpp:51:5: note: in expansion of macro 'EACH'
   51 |     EACH(i, c) c1.pb(i);
      |     ^~~~
paint.cpp:27:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   27 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
paint.cpp:56:5: note: in expansion of macro 'FOR'
   56 |     FOR(i, 1, n) f[i] = f[i - 1] + (s[i] == '_'? 1 : 0);
      |     ^~~
paint.cpp:27:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   27 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
paint.cpp:58:5: note: in expansion of macro 'FOR'
   58 |     FOR(i, 1, n)
      |     ^~~
paint.cpp:27:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   27 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
paint.cpp:59:5: note: in expansion of macro 'FOR'
   59 |     FOR(j, 0, k) {
      |     ^~~
paint.cpp:28:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   28 | #define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
      |                               ^
paint.cpp:81:5: note: in expansion of macro 'FOS'
   81 |     FOS(i, n, 1)
      |     ^~~
paint.cpp:28:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   28 | #define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
      |                               ^
paint.cpp:82:5: note: in expansion of macro 'FOS'
   82 |     FOS(j, k + 1, 1) {
      |     ^~~
paint.cpp:27:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   27 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
paint.cpp:103:5: note: in expansion of macro 'FOR'
  103 |     FOR(i, 1, n) {
      |     ^~~
paint.cpp:27:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   27 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
paint.cpp:110:9: note: in expansion of macro 'FOR'
  110 |         FOR(j, 0, k) ok = ok || (d[i - 1][j] && d1[i + 1][j + 1]);
      |         ^~~
paint.cpp:27:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   27 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
paint.cpp:113:5: note: in expansion of macro 'FOR'
  113 |     FOR(i, 1, k)
      |     ^~~
paint.cpp:27:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   27 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
paint.cpp:114:5: note: in expansion of macro 'FOR'
  114 |     FOR(j, 1, n - c[i] + 1) {
      |     ^~~
paint.cpp:27:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   27 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
paint.cpp:123:5: note: in expansion of macro 'FOR'
  123 |     FOR(i, 1, n) a[i] += a[i - 1];
      |     ^~~
paint.cpp:27:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   27 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
paint.cpp:124:5: note: in expansion of macro 'FOR'
  124 |     FOR(i, 1, n) {
      |     ^~~
paint.cpp:27:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   27 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
paint.cpp:129:5: note: in expansion of macro 'FOR'
  129 |     FOR(i, 1, n)
      |     ^~~

• Subtask 1: 7 / 7
• Subtask 2: 3 / 3
• Subtask 3: 22 / 22
• Subtask 4: 27 / 27
• Subtask 5: 21 / 21
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10