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49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
#define _CRT_SECURE_NO_WARNINGS
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#define _SILENCE_CXX17_C_HEADER_DEPRECATION_WARNING
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#include <bits/stdc++.h>
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using namespace std;
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#define CRP(t, x) const t &x
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#define OPL(t, x) bool operator<(CRP(t, x)) const
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#define FIL(x, v) memset(x, v, sizeof(x))
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#define CLR(x) FIL(x, 0)
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#define NE1(x) FIL(x, -1)
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#define INF(x) FIL(x, 0x3f)
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#ifndef _DEBUG
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#define _DEBUG 0
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#endif // !_DEBUG
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#define IFD if (_DEBUG)
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typedef long long ll, i64;
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const int N = 1050, mod = 1e9 + 7;
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int a[N][N], r[N], c[N];
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void trySet(int i, int j, int v)
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{
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if (a[i][j] != 0 && a[i][j] != v) puts("0"), exit(0);
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a[i][j] = v;
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}
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int main()
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{
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int h, w;
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scanf("%d%d", &h, &w);
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for (int i = 0; i < h; i++) scanf("%d", r + i);
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for (int i = 0; i < w; i++) scanf("%d", c + i);
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for (int i = 0; i < h; i++)
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{
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for (int j = 0; j < r[i]; j++)
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trySet(i, j, 2);
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trySet(i, r[i], 1);
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}
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for (int i = 0; i < w; i++)
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{
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for (int j = 0; j < c[i]; j++)
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trySet(j, i, 2);
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trySet(c[i], i, 1);
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}
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int zcnt = 0;
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for (int i = 0; i < h; i++)
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for (int j = 0; j < w; j++)
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if (a[i][j] == 0) zcnt++;
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long long ans = 1;
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for (int i = 0; i < zcnt; i++) ans = ans * 2 % mod;
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printf("%lld", ans);
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return 0;
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} |