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
2016-11-30 20:44:00+0900
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
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