Submission #1689633
Source Code Expand
#include <iostream>
#include <cstdio>
#include <algorithm>
#define rep(i,a,b) for(int i = a; i <= b; i++)
#define dep(i,a,b) for(int i = a; i >= b; i--)
#define Rep(i,a) for(int i = 0; i < a; i++)
using namespace std;
typedef long long LL;
const int N = 1010, mod = 1e9 + 7;
int n, m; LL k;
char s[N][N];
bool check_vertical() {
rep(i,1,m) if (s[1][i] == '#' && s[n][i] == '#') return true;
return false;
}
bool check_horizontal() {
rep(i,1,n) if (s[i][1] == '#' && s[i][m] == '#') return true;
return false;
}
struct mat{ int a[2][2]; };
mat operator * (const mat &a, const mat &b) {
static mat w;
Rep(i,2) Rep(j,2) w.a[i][j] = 0;
Rep(i,2) Rep(j,2) Rep(k,2) w.a[i][k] = (w.a[i][k] + 1LL * a.a[i][j] * b.a[j][k]) % mod;
return w;
}
mat pw(mat a, LL b) {
mat w; Rep(i,2) Rep(j,2) w.a[i][j] = (i == j);
for(;b;b >>= 1, a = a * a) if (b & 1) w = w * a;
return w;
}
int main() {
scanf("%d%d%lld",&n,&m,&k);
rep(i,1,n) scanf("%s",s[i] + 1);
bool t1 = check_vertical(), t2 = check_horizontal();
if ((t1 && t2) || (k <= 1)) printf("1\n");
else {
int cnt = 0, tot = 0, c2 = 0;
rep(i,1,m) if (s[1][i] == '#' && s[n][i] == '#') cnt++;
rep(i,1,n) if (s[i][1] == '#' && s[i][m] == '#') cnt++;
rep(i,1,n) rep(j,1,m) if (s[i][j] == '#') tot++;
if (t1) {
rep(i,2,n) rep(j,1,m) if (s[i - 1][j] == '#' && s[i][j] == '#')
c2++;
} else if (t2) {
rep(i,1,n) rep(j,2,m) if (s[i][j - 1] == '#' && s[i][j] == '#')
c2++;
}
mat a;
a.a[0][0] = tot, a.a[0][1] = mod - c2;
a.a[1][0] = 0, a.a[1][1] = cnt;
a = pw(a, k - 1);
int ans = (a.a[0][0] + a.a[0][1]) % mod;
if (ans < 0) ans += mod;
printf("%d\n",ans);
}
return 0;
}
Submission Info
Submission Time |
|
Task |
F - Fraction of Fractal |
User |
WuHongxun |
Language |
C++14 (GCC 5.4.1) |
Score |
1700 |
Code Size |
1732 Byte |
Status |
AC |
Exec Time |
6 ms |
Memory |
1280 KB |
Compile Error
./Main.cpp: In function ‘int main()’:
./Main.cpp:37:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d%lld",&n,&m,&k);
^
./Main.cpp:38:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
rep(i,1,n) scanf("%s",s[i] + 1);
^
Judge Result
Set Name |
Sample |
All |
Score / Max Score |
0 / 0 |
1700 / 1700 |
Status |
|
|
Set Name |
Test Cases |
Sample |
s1.txt, s2.txt, s3.txt |
All |
01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, 23.txt, 24.txt, 25.txt, 26.txt, 27.txt, 28.txt, 29.txt, 30.txt, 31.txt, 32.txt, 33.txt, 34.txt, 35.txt, 36.txt, 37.txt, 38.txt, 39.txt, 40.txt, 41.txt, 42.txt, 43.txt, 44.txt, s1.txt, s2.txt, s3.txt |
Case Name |
Status |
Exec Time |
Memory |
01.txt |
AC |
4 ms |
1280 KB |
02.txt |
AC |
5 ms |
1280 KB |
03.txt |
AC |
6 ms |
1280 KB |
04.txt |
AC |
5 ms |
1280 KB |
05.txt |
AC |
6 ms |
1280 KB |
06.txt |
AC |
5 ms |
1280 KB |
07.txt |
AC |
5 ms |
1280 KB |
08.txt |
AC |
4 ms |
1280 KB |
09.txt |
AC |
5 ms |
1280 KB |
10.txt |
AC |
6 ms |
1280 KB |
11.txt |
AC |
4 ms |
1280 KB |
12.txt |
AC |
5 ms |
1280 KB |
13.txt |
AC |
5 ms |
1280 KB |
14.txt |
AC |
5 ms |
1280 KB |
15.txt |
AC |
5 ms |
1280 KB |
16.txt |
AC |
5 ms |
1280 KB |
17.txt |
AC |
5 ms |
1280 KB |
18.txt |
AC |
5 ms |
1280 KB |
19.txt |
AC |
5 ms |
1280 KB |
20.txt |
AC |
6 ms |
1280 KB |
21.txt |
AC |
6 ms |
1280 KB |
22.txt |
AC |
5 ms |
1280 KB |
23.txt |
AC |
5 ms |
1280 KB |
24.txt |
AC |
5 ms |
1280 KB |
25.txt |
AC |
5 ms |
1280 KB |
26.txt |
AC |
5 ms |
1280 KB |
27.txt |
AC |
5 ms |
1280 KB |
28.txt |
AC |
5 ms |
1280 KB |
29.txt |
AC |
1 ms |
256 KB |
30.txt |
AC |
1 ms |
256 KB |
31.txt |
AC |
1 ms |
256 KB |
32.txt |
AC |
1 ms |
256 KB |
33.txt |
AC |
1 ms |
256 KB |
34.txt |
AC |
1 ms |
256 KB |
35.txt |
AC |
1 ms |
256 KB |
36.txt |
AC |
1 ms |
256 KB |
37.txt |
AC |
1 ms |
256 KB |
38.txt |
AC |
1 ms |
256 KB |
39.txt |
AC |
1 ms |
256 KB |
40.txt |
AC |
1 ms |
256 KB |
41.txt |
AC |
1 ms |
256 KB |
42.txt |
AC |
1 ms |
256 KB |
43.txt |
AC |
1 ms |
256 KB |
44.txt |
AC |
1 ms |
256 KB |
s1.txt |
AC |
1 ms |
256 KB |
s2.txt |
AC |
1 ms |
256 KB |
s3.txt |
AC |
1 ms |
256 KB |