#include <bits/stdc++.h> using namespace std; #define f first #define s second #define pb push_back #define eb emplace_back #define mp make_pair #define all(v) v.begin(), v.end() #define sz(v) (int)v.size() #define sq(a) ((a)*(a)) #define MOO(i,a,b) for (int i=a; i<b; i++) #define M00(i,a) for (int i=0; i<a; i++) #define MOOd(i,a,b) for (int i = (b)-1; i >= a; i--) #define M00d(i,a) for (int i = (a)-1; i >= 0; i--) #define per(i,a,b) for (int i = (b)-1; i >= a; i--) #define rep(i,a,b) for (int i=a; i<b; i++) #define FOR(i,a,b) for (int i=a; i<b; i++) #define F0R(i,a) for (int i=0; i<a; i++) #define ROF(i,a,b) for (int i = (b)-1; i >= a; i--) #define R0F(i,a) for (int i = (a)-1; i >= 0; i--) #define FAST ios::sync_with_stdio(0); cin.tie(0); #define finish(x) return cout << x << endl, 0; #define dbg(x) cerr << ">>> " << #x << " = " << x << endl; #define _<< " _ " << #define int long long template<class T> bool ckmin(T&a, T&b) { bool B = a > b; a = min(a,b); return B; } template<class T> bool ckmax(T&a, T&b) { bool B = a < b; a = max(a,b); return B; } typedef long double ld; typedef pair<int,int> pi; typedef pair<ld,ld> pld; typedef complex<ld> cd; typedef vector<int> vi; typedef vector<ld> vld; typedef vector<vector<int>> vvi; const ld PI = acos(-1.0); const ld EPS = 1e-7; const int MOD = 1e9+7; const int MAXN = 601; int32_t main() { FAST int n; cin >> n; vvi leftL; vvi rightL; vvi leftP; vvi rightP; vi base(n, 0); vi test(MAXN, 100); for (int i = 0; i < n; i++){ string s; cin >> s; int m = s.length(); vi nL(m); vi nP(m); int ll = m; int lp = m + 1; for (int j = m - 1; j >= 0; j--){ nL[j] = ll; nP[j] = lp; if (s[j] == 'L'){ ll = j; } else { lp = j; } } vvi dp(m + 2, vi(MAXN, 0)); dp[ll][1] += 1; for (int j = 0; j < m; j++){ for (int k = 0; k < MAXN; k++){ if (k < MAXN - 1){ dp[nL[j]][k + 1] += dp[j][k]; if (dp[nL[j]][k + 1] >= MOD) dp[nL[j]][k + 1] -= MOD; } if (k){ dp[nP[j]][k - 1] += dp[j][k]; if (dp[nP[j]][k - 1] >= MOD) dp[nP[j]][k - 1] -= MOD; } } base[i] += dp[j][0]; if (base[i] >= MOD) base[i] -= MOD; } leftL.pb(dp[m]); leftP.pb(dp[m + 1]); vvi dq(m + 2, vi(MAXN, 0)); for (int j = 0; j < m; j ++) dq[j][0] = 1; for (int j = m - 1; j >= 0; j--){ for (int k = 0; k < MAXN; k++){ if (k < MAXN - 1){ dq[j][k] += dq[nL[j]][k + 1]; } if (k){ dq[j][k] += dq[nP[j]][k - 1]; } if (dq[j][k] >= MOD) dq[j][k] -= MOD; } } rightL.pb(dq[ll]); rightP.pb(dq[lp]); } for (int i = 0; i < n; i++){ for (int j = 0; j < n; j++){ int out = base[i]; for (int k = 0; k < MAXN; k++){ out += (leftL[i][k] * rightL[j][k]) % MOD; out += (leftP[i][k] * rightP[j][k]) % MOD; } cout << (out % MOD) << ' '; } cout << '\n'; } }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | #include <bits/stdc++.h> using namespace std; #define f first #define s second #define pb push_back #define eb emplace_back #define mp make_pair #define all(v) v.begin(), v.end() #define sz(v) (int)v.size() #define sq(a) ((a)*(a)) #define MOO(i,a,b) for (int i=a; i<b; i++) #define M00(i,a) for (int i=0; i<a; i++) #define MOOd(i,a,b) for (int i = (b)-1; i >= a; i--) #define M00d(i,a) for (int i = (a)-1; i >= 0; i--) #define per(i,a,b) for (int i = (b)-1; i >= a; i--) #define rep(i,a,b) for (int i=a; i<b; i++) #define FOR(i,a,b) for (int i=a; i<b; i++) #define F0R(i,a) for (int i=0; i<a; i++) #define ROF(i,a,b) for (int i = (b)-1; i >= a; i--) #define R0F(i,a) for (int i = (a)-1; i >= 0; i--) #define FAST ios::sync_with_stdio(0); cin.tie(0); #define finish(x) return cout << x << endl, 0; #define dbg(x) cerr << ">>> " << #x << " = " << x << endl; #define _<< " _ " << #define int long long template<class T> bool ckmin(T&a, T&b) { bool B = a > b; a = min(a,b); return B; } template<class T> bool ckmax(T&a, T&b) { bool B = a < b; a = max(a,b); return B; } typedef long double ld; typedef pair<int,int> pi; typedef pair<ld,ld> pld; typedef complex<ld> cd; typedef vector<int> vi; typedef vector<ld> vld; typedef vector<vector<int>> vvi; const ld PI = acos(-1.0); const ld EPS = 1e-7; const int MOD = 1e9+7; const int MAXN = 601; int32_t main() { FAST int n; cin >> n; vvi leftL; vvi rightL; vvi leftP; vvi rightP; vi base(n, 0); vi test(MAXN, 100); for (int i = 0; i < n; i++){ string s; cin >> s; int m = s.length(); vi nL(m); vi nP(m); int ll = m; int lp = m + 1; for (int j = m - 1; j >= 0; j--){ nL[j] = ll; nP[j] = lp; if (s[j] == 'L'){ ll = j; } else { lp = j; } } vvi dp(m + 2, vi(MAXN, 0)); dp[ll][1] += 1; for (int j = 0; j < m; j++){ for (int k = 0; k < MAXN; k++){ if (k < MAXN - 1){ dp[nL[j]][k + 1] += dp[j][k]; if (dp[nL[j]][k + 1] >= MOD) dp[nL[j]][k + 1] -= MOD; } if (k){ dp[nP[j]][k - 1] += dp[j][k]; if (dp[nP[j]][k - 1] >= MOD) dp[nP[j]][k - 1] -= MOD; } } base[i] += dp[j][0]; if (base[i] >= MOD) base[i] -= MOD; } leftL.pb(dp[m]); leftP.pb(dp[m + 1]); vvi dq(m + 2, vi(MAXN, 0)); for (int j = 0; j < m; j ++) dq[j][0] = 1; for (int j = m - 1; j >= 0; j--){ for (int k = 0; k < MAXN; k++){ if (k < MAXN - 1){ dq[j][k] += dq[nL[j]][k + 1]; } if (k){ dq[j][k] += dq[nP[j]][k - 1]; } if (dq[j][k] >= MOD) dq[j][k] -= MOD; } } rightL.pb(dq[ll]); rightP.pb(dq[lp]); } for (int i = 0; i < n; i++){ for (int j = 0; j < n; j++){ int out = base[i]; for (int k = 0; k < MAXN; k++){ out += (leftL[i][k] * rightL[j][k]) % MOD; out += (leftP[i][k] * rightP[j][k]) % MOD; } cout << (out % MOD) << ' '; } cout << '\n'; } } |