oj.uz

Submission #62232

# Submission time Handle Problem Language Result Execution time Memory
62232 2018-07-27T22:57:58 Z qkxwsm Dango Maker (JOI18_dango_maker) C++17
33 / 100
 737 ms 231304 KB 
/*
PROG: source
LANG: C++11
    _____
  .'     '.
 /  0   0  \
|     ^     |
|  \     /  |
 \  '---'  /
  '._____.'
 */
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

struct chash
{
    int operator()(int x) const
	{
		x ^= (x >> 20) ^ (x >> 12);
    	return x ^ (x >> 7) ^ (x >> 4);
	}
	int operator()(long long x) const
	{
		return x ^ (x >> 32);
	}
};

template<typename T> using orderedset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T> using hashtable = gp_hash_table<T, T, chash>;

template<class T>
void readi(T &x)
{
	T input = 0;
	bool negative = false;
	char c = ' ';
	while (c < '-')
	{
		c = getchar();
	}
	if (c == '-')
	{
		negative = true;
		c = getchar();
	}
	while (c >= '0')
	{
		input = input * 10 + (c - '0');
		c = getchar();
	}
	if (negative)
	{
		input = -input;
	}
	x = input;
}
template<class T>
void printi(T output)
{
	if (output == 0)
	{
		putchar('0');
		return;
	}
	if (output < 0)
	{
		putchar('-');
		output = -output;
	}
	int aout[20];
	int ilen = 0;
	while(output)
	{
		aout[ilen] = ((output % 10));
		output /= 10;
		ilen++;
	}
	for (int i = ilen - 1; i >= 0; i--)
	{
		putchar(aout[i] + '0');
	}
	return;
}
template<class T>
void ckmin(T &a, T b)
{
	a = min(a, b);
}
template<class T>
void ckmax(T &a, T b)
{
	a = max(a, b);
}
template<class T>
T normalize(T x, T mod = 1000000007)
{
	return (((x % mod) + mod) % mod);
}
long long randomizell(long long mod)
{
	return ((1ll << 45) * rand() + (1ll << 30) * rand() + (1ll << 15) * rand() + rand()) % mod;
}
int randomize(int mod)
{
	return ((1ll << 15) * rand() + rand()) % mod;
}

#define y0 ___y0
#define y1 ___y1
#define MP make_pair
#define MT make_tuple
#define PB push_back
#define PF push_front
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define debug(x) cerr << #x << " = " << x << endl;

const long double PI = 4.0 * atan(1.0);
const long double EPS = 1e-10;

#define MAGIC 347
#define SINF 10007
#define CO 1000007
#define INF 1000000007
#define BIG 1000000931
#define LARGE 1696969696967ll
#define GIANT 2564008813937411ll
#define LLINF 2696969696969696969ll
#define MAXN 3013
#define MAXM 6000013

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pdd;

int N, M, K, E = 2;
int S, T;
int grid[MAXN][MAXN];
int ok[MAXN][MAXN][2];
int lvl[MAXM];
bool color[MAXM];
int to[MAXM], cap[MAXM], nxt[MAXM], head[MAXM];
vector<int> seens;
int ans;

void addedge(int u, int v, int f)
{
    to[E] = v; cap[E] = f;
    nxt[E] = head[u]; head[u] = E;
    E++;
    to[E] = u; cap[E] = 0;
    nxt[E] = head[v]; head[v] = E;
    E++;
}
bool bfs()
{
    for (int i = 0; i < K; i++)
    {
        lvl[i] = -1;
    }
    queue<int> q;
    q.push(S);
    while(!q.empty())
    {
        int u = q.front();
        q.pop();
        for (int e = head[u]; e; e = nxt[e])
        {
            int v = to[e];
            if (cap[e] > 0 && lvl[v] == -1)
            {
                lvl[v] = lvl[u] + 1;
                q.push(v);
                if (v == T)
                {
                    return true;
                }
            }
        }
    }
    return false;
}
int aug(int u, int f)
{
    if (u == T)
    {
        return f;
    }
    int rem = f, gain = 0;
    for (int e = head[u]; e; e = nxt[e])
    {
        int v = to[e];
        if (cap[e] && lvl[v] == lvl[u] + 1)
        {
            gain = aug(v, min(rem, cap[e]));
			cap[e] -= gain;
			cap[e ^ 1] += gain;
			rem -= gain;
        }
    }
    return f - rem;
}
int dinic()
{
    int res = 0;
    while(bfs())
    {
        res += aug(S, INF);
    }
    return res;
}
int matching()
{
    S = K; T = K + 1;
    for (int i = 0; i < K; i++)
    {
        if (color[i])
        {
            addedge(i, T, 1);
        }
        else
        {
            addedge(S, i, 1);
        }
    }
    K += 2;
    return dinic();
}

int32_t main()
{
	ios_base::sync_with_stdio(0);
	srand(time(0));
	//	cout << fixed << setprecision(10);
	//	cerr << fixed << setprecision(10);
	if (fopen("input.in", "r"))
	{
		freopen ("input.in", "r", stdin);
		freopen ("output.out", "w", stdout);
	}
    cin >> N >> M;
    for (int i = 0; i < N; i++)
    {
        string temps;
        cin >> temps;
        for (int j = 0; j < M; j++)
        {
            if (temps[j] == 'R')
            {
                grid[i][j] = -1;
            }
            if (temps[j] == 'G')
            {
                grid[i][j] = 0;
            }
            if (temps[j] == 'W')
            {
                grid[i][j] = 1;
            }
            ok[i][j][0] = -1;
            ok[i][j][1] = -1;
        }
    }
    for (int i = 0; i < N; i++)
    {
        for (int j = 0; j < M; j++)
        {
            if (grid[i][j] == -1 && grid[i][j + 1] == 0 && grid[i][j + 2] == 1)
            {
                ok[i][j][1] = K;
                // cerr << i << ' ' << j << " r " << K << endl;
                color[K] = true;
                K++;
            }
            if (grid[i][j] == -1 && grid[i + 1][j] == 0 && grid[i + 2][j] == 1)
            {
                // cerr << i << ' ' << j << " d " << K << endl;
                ok[i][j][0] = K;
                color[K] = false;
                K++;
            }
        }
    }
    for (int i = 0; i < N; i++)
    {
        for (int j = 0; j < M; j++)
        {
            if (ok[i][j][0] == -1)
            {
                continue;
            }
            for (int k = 0; k <= 2; k++)
            {
                if (i + k < 0 || i + k >= N)
                {
                    continue;
                }
                for (int m = -2; m <= 0; m++)
                {
                    if (j + m < 0 || j + m >= M)
                    {
                        continue;
                    }
                    if (ok[i + k][j + m][1] == -1)
                    {
                        continue;
                    }
                    // cerr << i << ' ' << j << ' ' << i + k << ' ' << j + m << endl;
                    addedge(ok[i][j][0], ok[i + k][j + m][1], INF);
                }
            }
        }
    }
    ans = K - matching();
    cout << ans << '\n';
	//	cerr << "time elapsed = " << (clock() / (CLOCKS_PER_SEC / 1000)) << " ms" << endl;
	return 0;
}

Compilation message

dango_maker.cpp: In function 'int32_t main()':
dango_maker.cpp:246:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen ("input.in", "r", stdin);
   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
dango_maker.cpp:247:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen ("output.out", "w", stdout);
   ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 3 ms 504 KB Output is correct
3 Correct 3 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 564 KB Output is correct
6 Correct 3 ms 620 KB Output is correct
7 Correct 2 ms 656 KB Output is correct
8 Correct 3 ms 656 KB Output is correct
9 Correct 2 ms 656 KB Output is correct
10 Correct 2 ms 656 KB Output is correct
11 Correct 2 ms 656 KB Output is correct
12 Correct 2 ms 656 KB Output is correct
13 Correct 3 ms 656 KB Output is correct
14 Correct 2 ms 656 KB Output is correct
15 Correct 3 ms 656 KB Output is correct
16 Correct 2 ms 656 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 3 ms 504 KB Output is correct
3 Correct 3 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 564 KB Output is correct
6 Correct 3 ms 620 KB Output is correct
7 Correct 2 ms 656 KB Output is correct
8 Correct 3 ms 656 KB Output is correct
9 Correct 2 ms 656 KB Output is correct
10 Correct 2 ms 656 KB Output is correct
11 Correct 2 ms 656 KB Output is correct
12 Correct 2 ms 656 KB Output is correct
13 Correct 3 ms 656 KB Output is correct
14 Correct 2 ms 656 KB Output is correct
15 Correct 3 ms 656 KB Output is correct
16 Correct 2 ms 656 KB Output is correct
17 Correct 3 ms 656 KB Output is correct
18 Correct 2 ms 656 KB Output is correct
19 Correct 3 ms 656 KB Output is correct
20 Correct 3 ms 752 KB Output is correct
21 Correct 2 ms 752 KB Output is correct
22 Correct 2 ms 752 KB Output is correct
23 Correct 3 ms 752 KB Output is correct
24 Correct 2 ms 752 KB Output is correct
25 Correct 3 ms 752 KB Output is correct
26 Correct 2 ms 752 KB Output is correct
27 Correct 2 ms 752 KB Output is correct
28 Correct 3 ms 752 KB Output is correct
29 Correct 2 ms 752 KB Output is correct
30 Correct 2 ms 752 KB Output is correct
31 Correct 2 ms 752 KB Output is correct
32 Correct 2 ms 836 KB Output is correct
33 Correct 3 ms 836 KB Output is correct
34 Correct 2 ms 836 KB Output is correct
35 Correct 2 ms 836 KB Output is correct
36 Correct 3 ms 836 KB Output is correct
37 Correct 2 ms 836 KB Output is correct
38 Correct 3 ms 836 KB Output is correct
39 Correct 2 ms 872 KB Output is correct
40 Correct 2 ms 872 KB Output is correct
41 Correct 2 ms 872 KB Output is correct
42 Correct 2 ms 872 KB Output is correct
43 Correct 3 ms 872 KB Output is correct
44 Correct 2 ms 872 KB Output is correct
45 Correct 3 ms 872 KB Output is correct
46 Correct 2 ms 872 KB Output is correct
47 Correct 2 ms 872 KB Output is correct
48 Correct 2 ms 872 KB Output is correct
49 Correct 3 ms 872 KB Output is correct
50 Correct 2 ms 872 KB Output is correct
51 Correct 2 ms 872 KB Output is correct
52 Correct 2 ms 872 KB Output is correct
53 Correct 2 ms 872 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 504 KB Output is correct
2 Correct 3 ms 504 KB Output is correct
3 Correct 3 ms 504 KB Output is correct
4 Correct 2 ms 504 KB Output is correct
5 Correct 2 ms 564 KB Output is correct
6 Correct 3 ms 620 KB Output is correct
7 Correct 2 ms 656 KB Output is correct
8 Correct 3 ms 656 KB Output is correct
9 Correct 2 ms 656 KB Output is correct
10 Correct 2 ms 656 KB Output is correct
11 Correct 2 ms 656 KB Output is correct
12 Correct 2 ms 656 KB Output is correct
13 Correct 3 ms 656 KB Output is correct
14 Correct 2 ms 656 KB Output is correct
15 Correct 3 ms 656 KB Output is correct
16 Correct 2 ms 656 KB Output is correct
17 Correct 3 ms 656 KB Output is correct
18 Correct 2 ms 656 KB Output is correct
19 Correct 3 ms 656 KB Output is correct
20 Correct 3 ms 752 KB Output is correct
21 Correct 2 ms 752 KB Output is correct
22 Correct 2 ms 752 KB Output is correct
23 Correct 3 ms 752 KB Output is correct
24 Correct 2 ms 752 KB Output is correct
25 Correct 3 ms 752 KB Output is correct
26 Correct 2 ms 752 KB Output is correct
27 Correct 2 ms 752 KB Output is correct
28 Correct 3 ms 752 KB Output is correct
29 Correct 2 ms 752 KB Output is correct
30 Correct 2 ms 752 KB Output is correct
31 Correct 2 ms 752 KB Output is correct
32 Correct 2 ms 836 KB Output is correct
33 Correct 3 ms 836 KB Output is correct
34 Correct 2 ms 836 KB Output is correct
35 Correct 2 ms 836 KB Output is correct
36 Correct 3 ms 836 KB Output is correct
37 Correct 2 ms 836 KB Output is correct
38 Correct 3 ms 836 KB Output is correct
39 Correct 2 ms 872 KB Output is correct
40 Correct 2 ms 872 KB Output is correct
41 Correct 2 ms 872 KB Output is correct
42 Correct 2 ms 872 KB Output is correct
43 Correct 3 ms 872 KB Output is correct
44 Correct 2 ms 872 KB Output is correct
45 Correct 3 ms 872 KB Output is correct
46 Correct 2 ms 872 KB Output is correct
47 Correct 2 ms 872 KB Output is correct
48 Correct 2 ms 872 KB Output is correct
49 Correct 3 ms 872 KB Output is correct
50 Correct 2 ms 872 KB Output is correct
51 Correct 2 ms 872 KB Output is correct
52 Correct 2 ms 872 KB Output is correct
53 Correct 2 ms 872 KB Output is correct
54 Correct 3 ms 872 KB Output is correct
55 Correct 19 ms 24828 KB Output is correct
56 Correct 3 ms 24828 KB Output is correct
57 Correct 16 ms 24828 KB Output is correct
58 Correct 45 ms 24828 KB Output is correct
59 Correct 334 ms 132732 KB Output is correct
60 Correct 388 ms 132732 KB Output is correct
61 Correct 325 ms 132732 KB Output is correct
62 Correct 3 ms 132732 KB Output is correct
63 Correct 368 ms 132732 KB Output is correct
64 Incorrect 737 ms 231304 KB Output isn't correct
65 Halted 0 ms 0 KB -