Submission #329317

#	Time	Username	Problem	Language	Result	Execution time	Memory
329317		HoneyBadger	Dango Maker (JOI18_dango_maker)	C++17	100 / 100	1326 ms	45016 KiB

dango_maker

#include <iostream>
#include <iomanip>
#include <cstdio>
#include <vector>
#include <bitset>
#include <string>
#include <cstring>
#include <map>
#include <set>
#include <stack>
#include <queue>
#include <deque>
#include <utility>
#include <algorithm>
#include <random>
#include <cmath>
#include <cassert>
#include <climits>
#include <ctime>
#include <chrono>



/*#pragma GCC optimize("Ofast")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,sse4.1,sse4.2,popcnt,abm,mmx,avx,avx2,tune=native")
*/


#ifdef LOCAL
    #define dbg(x) cout << #x << " : " << x << endl;
#else
    #define dbg(x)
#endif

#define pb push_back
#define ppb pop_back()
#define mp make_pair
#define fi(a, b) for (int i = a; i < b; i++)
#define fj(a, b) for (int j = a; j < b; j++)
#define fk(a, b) for (int k = a; k < b; k++)
#define fi1(a, b) for (int i = a - 1; i >= b; i--)
#define fj1(a, b) for (int j = a - 1; j >= b; j--)
#define fk1(a, b) for (int k = a - 1; k >= b; k--)
#define fx(x, a) for (auto& x : a)
#define rep(i, a, b) for (int i = a; i < b; ++i)
#define rep1(i, a, b) for (int i = a - 1; i >= b; --i)
#define siz(x) (int)x.size()
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()

using namespace std;

template<typename T1, typename T2>inline void mine(T1 &x, const T2 &y) { if (y < x) x = y; }
template<typename T1, typename T2>inline void maxe(T1 &x, const T2 &y) { if (x < y) x = y; }

ostream& operator << (ostream &out, const vector<int> &b) {
    for (auto k : b) out << k << ' ';
    return out;
}

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef char ch;
typedef string str;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<pii> vpii;
typedef vector<vpii> vvpii;
typedef vector<ch> vch;
typedef vector<vch> vvch;
typedef vector<str> vs;



const int MOD = 1000000007;
const int INF = 1000000050;
const long long BIG = (long long)2e18 + 50;
const int MX = 3010;
const double EPS = 1e-9;


mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int t[MX][MX];
int n, m;

bool good(int i, int j) {
	return i >= 0 && j >= 0 && i < n && j < m;
}
int tod(int i, int j) {
	fk(0, 3) {
		if (!good(i, j) || t[i][j] != k) {
			return 0;
		}
		++i;
	}
	return 1;
} 

int tor(int i, int j) {
	fk(0, 3) {
		if (!good(i, j) || t[i][j] != k) {
			return 0;
		}
		++j;
	}
	return 1;
}

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> n >> m;
    fi(0, n) {
    	fj(0, m) {
    		char c;
    		cin >> c;
    		if (c == 'R') t[i][j] = 0;
    		else if (c == 'G') t[i][j] = 1;
    		else t[i][j] = 2;
    	}
    }
    int ans = 0;
    for (int sum = 0; sum <= n + m; ++sum) {
    	int i = max(0, sum - m + 1);
    	int j = sum - i;
    	vvi dp(1, vi(3, 0));
    	while (good(i, j)) {
    		vi w(3);
    		w[2] = tod(i, j) + *max_element(all(dp.back()));
    		w[1] = dp.back()[2];
    		w[0] = max(dp.back()[0] + tor(i, j), dp.back()[1]);
    		dp.pb(w);
    		++i, --j;
    	}
    	ans += *max_element(all(dp.back()));
    }
    assert(ans <= n * m / 3);
    cout << ans << '\n';
}

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