Submission #1004111


Source Code Expand

#include <cstdio>
#include <cmath>

typedef long long   signed int LL;
typedef long long unsigned int LU;

#define incID(i, l, r) for(int i = (l)    ; i <  (r); i++)
#define incII(i, l, r) for(int i = (l)    ; i <= (r); i++)
#define decID(i, l, r) for(int i = (r) - 1; i >= (l); i--)
#define decII(i, l, r) for(int i = (r)    ; i >= (l); i--)
#define inc( i, n) incID(i, 0, n)
#define inc1(i, n) incII(i, 1, n)
#define dec( i, n) decID(i, 0, n)
#define dec1(i, n) decII(i, 1, n)

#define inII(v, l, r) ((l) <= (v) && (v) <= (r))
#define inID(v, l, r) ((l) <= (v) && (v) <  (r))

template<typename T> void swap(T & x, T & y) { T t = x; x = y; y = t; return; }
template<typename T> T abs(T x) { return (0 <= x ? x : -x); }
template<typename T> T max(T a, T b) { return (b <= a ? a : b); }
template<typename T> T min(T a, T b) { return (a <= b ? a : b); }
template<typename T> bool setmin(T & a, T b) { if(a <= b) { return false; } else { a = b; return true; } }
template<typename T> bool setmax(T & a, T b) { if(b <= a) { return false; } else { a = b; return true; } }
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; }

// ---- ----

int n, m;
LL dp[2][302][302][2];
const int MOD = 1000000007;

int main() {
	scanf("%d%d", &n, &m);
	
	int from = 0, to = 1;
	dp[to][1][1][0] = 1;
	inc(mm, m) {
		swap(from, to);
		
		inc1(i, n) {
		inc1(j, n) {
			dp[to][i][j][0] = 0;
			dp[to][i][j][1] = 0;
		}
		}
		
		inc1(i, n) {
		inc1(j, n) {
			LL zero = dp[from][i][j][0];
			LL  one = dp[from][i][j][1];
			
			(dp[to][i    ][j    ][0] += zero * j      ) %= MOD;
			(dp[to][i    ][j + 1][1] += zero * (i - j)) %= MOD;
			(dp[to][i + 1][j    ][1] += zero * (n - i)) %= MOD;
			(dp[to][i    ][i    ][0] +=  one * j      ) %= MOD;
			(dp[to][i    ][j    ][1] +=  one * (i - j)) %= MOD;
			(dp[to][i + 1][j    ][1] +=  one * (n - i)) %= MOD;
		}
		}
	}
	
	printf("%lld\n", dp[to][n][n][0]);
	
	return 0;
}

Submission Info

Submission Time
Task F - Road of the King
User FF256grhy
Language C++14 (GCC 5.4.1)
Score 1000
Code Size 2056 Byte
Status AC
Exec Time 319 ms
Memory 3072 KB

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:35:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &m);
                       ^

Judge Result

Set Name sample all
Score / Max Score 0 / 0 1000 / 1000
Status
AC × 3
AC × 13
Set Name Test Cases
sample sample-01.txt, sample-02.txt, sample-03.txt
all sample-01.txt, sample-02.txt, sample-03.txt, 01-01.txt, 01-02.txt, 01-03.txt, 01-04.txt, 01-05.txt, 01-06.txt, 01-07.txt, 01-08.txt, 01-09.txt, 01-10.txt
Case Name Status Exec Time Memory
01-01.txt AC 1 ms 128 KB
01-02.txt AC 1 ms 128 KB
01-03.txt AC 1 ms 128 KB
01-04.txt AC 4 ms 1536 KB
01-05.txt AC 2 ms 256 KB
01-06.txt AC 31 ms 1024 KB
01-07.txt AC 298 ms 2944 KB
01-08.txt AC 315 ms 2944 KB
01-09.txt AC 317 ms 2944 KB
01-10.txt AC 319 ms 2944 KB
sample-01.txt AC 1 ms 256 KB
sample-02.txt AC 83 ms 1536 KB
sample-03.txt AC 162 ms 3072 KB