Submission #1127532
Source Code Expand
#include <bits/stdc++.h> using namespace std; const int maxn = 305,mo = int(1e9) + 7; bitset<maxn> a[maxn]; int f[maxn][maxn],pw[maxn * maxn],n; int pow(int a,int b) { int tmp = 1; for(;b;b >>= 1,a = a * 1ll * a % mo) if (b & 1) tmp = tmp * 1ll * a % mo; return tmp; } int main() { scanf("%d", &n); for(int i = 1;i <= n;i ++) for(int j = 1,v;j <= n;j ++) scanf("%d", &v),a[i][j] = v; int r = 0; for(int i = 1,j = 1;i <= n && j <= n;j ++) { for(int k = i;k <= n;k ++) if (a[k][j]) {swap(a[i],a[k]);break;} if (!a[i][j]) continue; ++ r; for(int k = i + 1;k <= n;k ++) if (a[k][j]) a[k] ^= a[i]; ++ i; } pw[0] = 1; for(int i = 1;i <= n * n;i ++) pw[i] = pw[i - 1] * 2ll % mo; f[0][0] = 1; for(int i = 1;i <= n;i ++) for(int j = 1;j <= i;j ++) f[i][j] = (f[i - 1][j] * 1ll * pw[j] % mo + f[i - 1][j - 1] * 1ll * (pw[n] - pw[j - 1]) % mo) % mo; int ans = 0; for(int i = r;i <= n;i ++) ans = (ans + f[n][i] * 1ll * pw[n * (n - i)] % mo * f[i][r]) % mo; printf("%d\n", (ans * 1ll * pow(f[n][r],mo - 2) % mo + mo) % mo); return 0; }
Submission Info
Submission Time | |
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Task | H - AB=C Problem |
User | philipsweng |
Language | C++14 (GCC 5.4.1) |
Score | 0 |
Code Size | 1115 Byte |
Status | WA |
Exec Time | 9 ms |
Memory | 1024 KB |
Compile Error
./Main.cpp: In function ‘int main()’: ./Main.cpp:42:65: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d\n", (ans * 1ll * pow(f[n][r],mo - 2) % mo + mo) % mo); ^ ./Main.cpp:20:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ ./Main.cpp:23:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v),a[i][j] = v; ^
Judge Result
Set Name | Sample | All | ||||||
---|---|---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 0 / 1500 | ||||||
Status |
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Set Name | Test Cases |
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Sample | example0.txt, example1.txt |
All | 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, 020.txt, 021.txt, 022.txt, 023.txt, 024.txt, 025.txt, 026.txt, 027.txt, 028.txt, 029.txt, 030.txt, 031.txt, 032.txt, 033.txt, 034.txt, 035.txt, 036.txt, 037.txt, 038.txt, 039.txt, example0.txt, example1.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
000.txt | WA | 1 ms | 256 KB |
001.txt | AC | 1 ms | 256 KB |
002.txt | WA | 1 ms | 256 KB |
003.txt | AC | 1 ms | 256 KB |
004.txt | AC | 1 ms | 256 KB |
005.txt | WA | 1 ms | 256 KB |
006.txt | AC | 1 ms | 256 KB |
007.txt | AC | 1 ms | 256 KB |
008.txt | AC | 1 ms | 256 KB |
009.txt | WA | 1 ms | 256 KB |
010.txt | AC | 1 ms | 256 KB |
011.txt | AC | 1 ms | 256 KB |
012.txt | AC | 1 ms | 256 KB |
013.txt | AC | 1 ms | 256 KB |
014.txt | AC | 2 ms | 384 KB |
015.txt | AC | 3 ms | 512 KB |
016.txt | AC | 2 ms | 384 KB |
017.txt | AC | 5 ms | 640 KB |
018.txt | AC | 2 ms | 384 KB |
019.txt | AC | 1 ms | 256 KB |
020.txt | AC | 3 ms | 512 KB |
021.txt | AC | 9 ms | 896 KB |
022.txt | AC | 2 ms | 384 KB |
023.txt | AC | 9 ms | 896 KB |
024.txt | AC | 9 ms | 1024 KB |
025.txt | AC | 9 ms | 1024 KB |
026.txt | AC | 9 ms | 1024 KB |
027.txt | AC | 9 ms | 1024 KB |
028.txt | AC | 9 ms | 1024 KB |
029.txt | AC | 9 ms | 1024 KB |
030.txt | AC | 9 ms | 1024 KB |
031.txt | AC | 9 ms | 1024 KB |
032.txt | AC | 9 ms | 1024 KB |
033.txt | AC | 9 ms | 1024 KB |
034.txt | WA | 9 ms | 1024 KB |
035.txt | WA | 6 ms | 768 KB |
036.txt | AC | 9 ms | 1024 KB |
037.txt | AC | 8 ms | 896 KB |
038.txt | AC | 9 ms | 1024 KB |
039.txt | AC | 9 ms | 896 KB |
example0.txt | AC | 1 ms | 256 KB |
example1.txt | AC | 1 ms | 256 KB |