Submission #102343

#	Time	Username	Problem	Language	Result	Execution time	Memory
102343		jwvg0425	마스코트 (JOI13_mascots)	C++17	40 / 100	74 ms	72312 KiB

mascots

#include <stdio.h>
#include <vector>
#include <queue>
#include <algorithm>
#include <iostream>
#include <string>
#include <bitset>
#include <map>
#include <set>
#include <tuple>
#include <string.h>
#include <math.h>
#include <random>
#include <functional>
#include <assert.h>
#include <math.h>
#include <iterator>
#include <chrono>
#define MOD 1000000007
#define all(x) (x).begin(), (x).end()
#define xx first
#define yy second

using namespace std;

using i64 = long long int;
using ii = pair<int, int>;
using ii64 = pair<i64, i64>;
using vi = vector<long long int>;

i64 table[55][55][55][55];
int r, c, n;
i64 facto[9000005];

i64 solve(int lx, int ly, int rx, int ry)
{
	if (lx < 1 || ly < 1 || rx > r || ry > c)
		return 0;

	if (lx == 1 && ly == 1 && rx == r && ry == c)
		return 1;

	if (table[lx][ly][rx][ry] != -1)
		return table[lx][ly][rx][ry];

	auto& res = table[lx][ly][rx][ry];
	res = 0;

	i64 l = (facto[ry - ly + 1] * solve(lx - 1, ly, rx, ry)) % MOD;
	i64 r = (facto[ry - ly + 1] * solve(lx, ly, rx + 1, ry)) % MOD;
	i64 u = (facto[rx - lx + 1] * solve(lx, ly - 1, rx, ry)) % MOD;
	i64 d = (facto[rx - lx + 1] * solve(lx, ly, rx, ry + 1)) % MOD;
	
	res = (res + l) % MOD;
	res = (res + r) % MOD;
	res = (res + u) % MOD;
	res = (res + d) % MOD;

	return res;
}

int main()
{
	memset(table, -1, sizeof(table));

	scanf("%d %d %d", &r, &c, &n);

	int lx = r, rx = 0, ly = c, ry = 0;

	facto[0] = 1;

	for (int i = 1; i <= r * c; i++)
		facto[i] = (facto[i - 1] * i) % MOD;

	for (int i = 0; i < n; i++)
	{
		int x, y;
		scanf("%d %d", &x, &y);
		lx = min(lx, x);
		rx = max(rx, x);
		ly = min(ly, y);
		ry = max(ry, y);
	}

	int count = (rx - lx + 1) * (ry - ly + 1) - n;

	printf("%lld\n", (facto[count] * solve(lx, ly, rx, ry)) % MOD);

	return 0;
}

Compilation message (stderr)

mascots.cpp: In function 'int main()':
mascots.cpp:66:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d", &r, &c, &n);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
mascots.cpp:78:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d", &x, &y);
   ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 30 / 30
• Subtask 3: 0 / 60