Submission #644221

#	Time	Username	Problem	Language	Result	Execution time	Memory
644221		ghostwriter	Dango Maker (JOI18_dango_maker)	C++14	100 / 100	413 ms	230632 KiB

dango_maker

#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include <debug.h>
#endif
#define ft front
#define bk back
#define st first
#define nd second
#define ins insert
#define ers erase
#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 bg begin
#define ed end
#define all(x) (x).bg(), (x).ed()
#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
    VOI23 gold medal
*/
const int N = 3015;
int n, m, p1[N][N], p2[N][N], d[N][N][3], c[N][N], rs = 0;
char a[N][N];
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    // freopen(file".inp", "r", stdin)
    // freopen(file".out", "w", stdout);
    cin >> n >> m;
    FOR(i, 1, n)
    FOR(j, 1, m)
    	cin >> a[i + 3][j + 3];
    FOR(i, 3, n + 3)
    FOR(j, 3, m + 3) {
    	if (a[i][j] != 'R' || a[i][j + 1] != 'G' || a[i][j + 2] != 'W') continue;
    	p1[i][j] = 1;
    }
    FOR(i, 3, n + 3)
    FOR(j, 3, m + 3) {
    	if (a[i][j] != 'R' || a[i + 1][j] != 'G' || a[i + 2][j] != 'W') continue;
    	p2[i][j] = 1;
    }
    FOR(i, 1, n + 3)
    FOR(j, 1, m + 3)
    FOR(z, 0, 2) {
        d[i][j][z] = max(d[i][j][z], d[i - 1][j + 1][min(2, z + 1)]);
        if (p1[i][j]) d[i][j][z] = max(d[i][j][z], d[i - 1][j + 1][0] + 1);
        if (z == 2 && p2[i][j]) d[i][j][z] = max(d[i][j][z], d[i - 1][j + 1][2] + 1);
    }
    FOR(i, 1, n + 3)
    FOR(j, 1, m + 3) {
        if (c[i][j]) continue;
        int x = i, y = j;
        WHILE(x <= n + 3 && y >= 1) {
            c[x][y] = 1;
            ++x;
            --y;
        }
        --x;
        ++y;
        rs += d[x][y][0];
    }
    cout << rs;
    return 0;
}
/*
4 4
RGWR
GRRG
WGGW
WWWR
*/
/*
From Benq:
    stuff you should look for
        * int overflow, array bounds
        * special cases (n=1?)
        * do smth instead of nothing and stay organized
        * WRITE STUFF DOWN
        * DON'T GET STUCK ON ONE APPROACH
*/

Compilation message (stderr)

dango_maker.cpp: In function 'int main()':
dango_maker.cpp:30:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
dango_maker.cpp:49:5: note: in expansion of macro 'FOR'
   49 |     FOR(i, 1, n)
      |     ^~~
dango_maker.cpp:30:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
dango_maker.cpp:50:5: note: in expansion of macro 'FOR'
   50 |     FOR(j, 1, m)
      |     ^~~
dango_maker.cpp:30:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
dango_maker.cpp:52:5: note: in expansion of macro 'FOR'
   52 |     FOR(i, 3, n + 3)
      |     ^~~
dango_maker.cpp:30:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
dango_maker.cpp:53:5: note: in expansion of macro 'FOR'
   53 |     FOR(j, 3, m + 3) {
      |     ^~~
dango_maker.cpp:30:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
dango_maker.cpp:57:5: note: in expansion of macro 'FOR'
   57 |     FOR(i, 3, n + 3)
      |     ^~~
dango_maker.cpp:30:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
dango_maker.cpp:58:5: note: in expansion of macro 'FOR'
   58 |     FOR(j, 3, m + 3) {
      |     ^~~
dango_maker.cpp:30:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
dango_maker.cpp:62:5: note: in expansion of macro 'FOR'
   62 |     FOR(i, 1, n + 3)
      |     ^~~
dango_maker.cpp:30:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
dango_maker.cpp:63:5: note: in expansion of macro 'FOR'
   63 |     FOR(j, 1, m + 3)
      |     ^~~
dango_maker.cpp:30:31: warning: unnecessary parentheses in declaration of 'z' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
dango_maker.cpp:64:5: note: in expansion of macro 'FOR'
   64 |     FOR(z, 0, 2) {
      |     ^~~
dango_maker.cpp:30:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
dango_maker.cpp:69:5: note: in expansion of macro 'FOR'
   69 |     FOR(i, 1, n + 3)
      |     ^~~
dango_maker.cpp:30:31: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
   30 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
dango_maker.cpp:70:5: note: in expansion of macro 'FOR'
   70 |     FOR(j, 1, m + 3) {
      |     ^~~

• Subtask 1: 13 / 13
• Subtask 2: 20 / 20
• Subtask 3: 67 / 67