65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
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/*
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ͳ<EFBFBD>Ʒ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݡ<EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD><EFBFBD>ɵ<EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD>һ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>˼<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ<EFBFBD><EFBFBD>
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<EFBFBD><EFBFBD>n=3n=3Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Դ<EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD>ΪL<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>=(ʹ<EFBFBD>õ<EFBFBD>1<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>+ʹ<EFBFBD>õ<EFBFBD>2<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>+ʹ<EFBFBD>õ<EFBFBD>3<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)-(ʹ<EFBFBD>õ<EFBFBD>1<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>2<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>+ʹ<EFBFBD>õ<EFBFBD>2<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>3<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>+ʹ<EFBFBD>õ<EFBFBD>1<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>3<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)+(ʹ<EFBFBD>õ<EFBFBD>1<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>2<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>3<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)=(ʹ<EFBFBD>õ<EFBFBD>1<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>+ʹ<EFBFBD>õ<EFBFBD>2<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>+ʹ<EFBFBD>õ<EFBFBD>3<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)?(ʹ<EFBFBD>õ<EFBFBD>1<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>2<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>+ʹ<EFBFBD>õ<EFBFBD>2<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>3<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>+ʹ<EFBFBD>õ<EFBFBD>1<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>3<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)+(ʹ<EFBFBD>õ<EFBFBD>1<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>2<EFBFBD>л<EFBFBD><EFBFBD><EFBFBD>3<EFBFBD>е<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)<EFBFBD><EFBFBD>
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD>nn<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1818<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>00<EFBFBD><EFBFBD>2^{18}-12
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18
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?1<EFBFBD><EFBFBD>ʾÿһ<EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD>Ŀ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԡ<EFBFBD><EFBFBD><EFBFBD>00<EFBFBD><EFBFBD>2^{18}-12
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18
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?1ö<EFBFBD><EFBFBD>i<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ii<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>11<EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ii<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ż<EFBFBD><EFBFBD><EFBFBD><EFBFBD>11<EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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<EFBFBD><EFBFBD>i<EFBFBD><EFBFBD><EFBFBD><EFBFBD>kk<EFBFBD><EFBFBD>11<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǻ<EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>kk<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>2626<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>int<EFBFBD><EFBFBD>3232λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3232λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊλʾͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD>2626λ<EFBFBD><EFBFBD>Ӧ2626<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD>ּ<EFBFBD><EFBFBD>ɡ<EFBFBD>*/
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#include <bits/stdc++.h>
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using namespace std;
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typedef long long ll;
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typedef pair<int, int> pii;
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const int maxn = 18;
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const int mod = 998244353;
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int n, L, mask[18];
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char s[18][27];
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ll ans;
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ll qpow(ll a, ll b)
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{
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ll re = 1;
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while (b != 0)
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{
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if ((b & 1) == 1)
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re = re * a % mod;
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a = a * a % mod;
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b >>= 1;
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}
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return re;
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}
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int Count(int x)
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{
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int cnt = 0;
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while (x != 0)
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{
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if ((x & 1) == 1)
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cnt++;
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x >>= 1;
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}
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return cnt;
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}
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int main()
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{
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scanf("%d%d", &n, &L);
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for (int i = 0; i < n; i++)
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{
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scanf("%s", s[i]);
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for (int j = 0; s[i][j] != '\0'; j++)
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mask[i] |= (1 << (s[i][j] - 'a'));
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}
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for (int i = 1; i < (1 << n); i++)
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{
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int ch = (1 << 26) - 1, cnt = 0;
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for (int j = 0; j < n; j++)
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if (((1 << j)&i) != 0)
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cnt++, ch &= mask[j];
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if ((cnt & 1) == 1)
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ans = (ans + qpow(Count(ch), L)) % mod;
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else
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ans = (ans + (mod - qpow(Count(ch), L)) % mod) % mod;
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}
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printf("%lld\n", ans);
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return 0;
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}
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