#include <bits/stdc++.h> #define ALL(x) (x).begin(), (x).end() #define SZ(x) ((int)(x).size()) #define st first #define nd second using namespace std; #define sim template < class c #define ris return * this #define dor > debug & operator << #define eni(x) sim > typename \ enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) { sim > struct rge { c b, e; }; sim > rge<c> range(c i, c j) { return rge<c>{i, j}; } sim > auto dud(c* x) -> decltype(cerr << *x, 0); sim > char dud(...); struct debug { #ifdef LOCAL ~debug() { cerr << endl; } eni(!=) cerr << boolalpha << i; ris; } eni(==) ris << range(begin(i), end(i)); } sim, class b dor(pair < b, c > d) { ris << "(" << d.first << ", " << d.second << ")"; } sim dor(rge<c> d) { *this << "["; for (auto it = d.b; it != d.e; ++it) *this << ", " + 2 * (it == d.b) << *it; ris << "]"; } #else sim dor(const c&) { ris; } #endif }; #define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] " using ll = long long; using pii = pair<int,int>; using pll = pair<ll,ll>; using vi = vector<int>; using vll = vector<ll>; const int mod = 1000 * 1000 * 1000 + 7; inline void add_mod(int &a, int b) { a += b; if (a >= mod) { a -= mod; } } inline void sub_mod(int &a, int b) { a -= b; if (a < 0) { a += mod; } } int mul_mod(int a, int b) { return (ll)a * b % mod; } struct StringInfo { int cnt_within = 0; vi pref_l, pref_r; vi suf_l, suf_r; }; vector<StringInfo> string_infos; const int kMaxLen = 700; int dp[kMaxLen][kMaxLen]; StringInfo ProcessString(string s) { debug() << imie(s); const int L = SZ(s); for (int i = 0; i <= L; ++i) { memset(dp[i], 0, sizeof(dp[i])); } vi nxt_l(L + 1), nxt_r(L + 1); nxt_l[L] = nxt_r[L] = L + 1; for (int i = L - 1; i >= 0; --i) { nxt_l[i] = (s[i] == 'L' ? i + 1 : nxt_l[i + 1]); nxt_r[i] = (s[i] == 'P' ? i + 1 : nxt_r[i + 1]); } StringInfo info; info.pref_l.resize(L + 2); info.pref_r.resize(L + 2); info.suf_l.resize(L + 2); info.suf_r.resize(L + 2); dp[0][0] = 1; for (int loc = 0; loc <= L; ++loc) { for (int delta = 0; delta <= loc; ++delta) { if (!dp[loc][delta]) { continue; } if (nxt_l[loc] > L) { add_mod(info.pref_l[delta + 1], dp[loc][delta]); } else { add_mod(dp[nxt_l[loc]][delta + 1], dp[loc][delta]); } if (delta > 0) { if (nxt_r[loc] > L) { add_mod(info.pref_r[delta - 1], dp[loc][delta]); } else { add_mod(dp[nxt_r[loc]][delta - 1], dp[loc][delta]); } } } if (loc) { add_mod(info.cnt_within, dp[loc][0]); } } debug() << imie(info.cnt_within); debug() << imie(info.pref_l); debug() << imie(info.pref_r); for (int i = 0; i <= L; ++i) { memset(dp[i], 0, sizeof(dp[i])); } for (int loc = L; loc > 0; --loc) { dp[loc][0] = 1; for (int delta = 0; delta <= L + 2; ++delta) { if (nxt_l[loc] <= L) { add_mod(dp[loc][delta], dp[nxt_l[loc]][delta + 1]); } if (delta > 0 && nxt_r[loc] <= L) { add_mod(dp[loc][delta], dp[nxt_r[loc]][delta - 1]); } } } for (int delta = 0; delta <= L + 1; ++delta) { if (nxt_l[0] <= L) { info.suf_l[delta] = dp[nxt_l[0]][delta]; } if (nxt_r[0] <= L) { info.suf_r[delta] = dp[nxt_r[0]][delta]; } } debug() << imie(info.suf_l); debug() << imie(info.suf_r); return info; } const ll large_mod = 5LL * mod * mod; int ComputeResult(const StringInfo &lhs, const StringInfo &rhs) { ll ans = lhs.cnt_within; for (int i = 0; i < min(SZ(lhs.pref_l), SZ(rhs.pref_l)); ++i) { ans += (ll)lhs.pref_l[i] * rhs.suf_l[i]; ans += (ll)lhs.pref_r[i] * rhs.suf_r[i]; if (ans >= large_mod) { ans -= large_mod; } } return ans % mod; } int main() { ios_base::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(11); cerr << fixed << setprecision(6); int n; cin >> n; for (int i = 0; i < n; ++i) { string s; cin >> s; string_infos.push_back(ProcessString(s)); } for (int i = 0; i < n; ++i) { for (int j = 0; j < n; ++j) { cout << ComputeResult(string_infos[i], string_infos[j]) << " "; } 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | #include <bits/stdc++.h> #define ALL(x) (x).begin(), (x).end() #define SZ(x) ((int)(x).size()) #define st first #define nd second using namespace std; #define sim template < class c #define ris return * this #define dor > debug & operator << #define eni(x) sim > typename \ enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) { sim > struct rge { c b, e; }; sim > rge<c> range(c i, c j) { return rge<c>{i, j}; } sim > auto dud(c* x) -> decltype(cerr << *x, 0); sim > char dud(...); struct debug { #ifdef LOCAL ~debug() { cerr << endl; } eni(!=) cerr << boolalpha << i; ris; } eni(==) ris << range(begin(i), end(i)); } sim, class b dor(pair < b, c > d) { ris << "(" << d.first << ", " << d.second << ")"; } sim dor(rge<c> d) { *this << "["; for (auto it = d.b; it != d.e; ++it) *this << ", " + 2 * (it == d.b) << *it; ris << "]"; } #else sim dor(const c&) { ris; } #endif }; #define imie(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] " using ll = long long; using pii = pair<int,int>; using pll = pair<ll,ll>; using vi = vector<int>; using vll = vector<ll>; const int mod = 1000 * 1000 * 1000 + 7; inline void add_mod(int &a, int b) { a += b; if (a >= mod) { a -= mod; } } inline void sub_mod(int &a, int b) { a -= b; if (a < 0) { a += mod; } } int mul_mod(int a, int b) { return (ll)a * b % mod; } struct StringInfo { int cnt_within = 0; vi pref_l, pref_r; vi suf_l, suf_r; }; vector<StringInfo> string_infos; const int kMaxLen = 700; int dp[kMaxLen][kMaxLen]; StringInfo ProcessString(string s) { debug() << imie(s); const int L = SZ(s); for (int i = 0; i <= L; ++i) { memset(dp[i], 0, sizeof(dp[i])); } vi nxt_l(L + 1), nxt_r(L + 1); nxt_l[L] = nxt_r[L] = L + 1; for (int i = L - 1; i >= 0; --i) { nxt_l[i] = (s[i] == 'L' ? i + 1 : nxt_l[i + 1]); nxt_r[i] = (s[i] == 'P' ? i + 1 : nxt_r[i + 1]); } StringInfo info; info.pref_l.resize(L + 2); info.pref_r.resize(L + 2); info.suf_l.resize(L + 2); info.suf_r.resize(L + 2); dp[0][0] = 1; for (int loc = 0; loc <= L; ++loc) { for (int delta = 0; delta <= loc; ++delta) { if (!dp[loc][delta]) { continue; } if (nxt_l[loc] > L) { add_mod(info.pref_l[delta + 1], dp[loc][delta]); } else { add_mod(dp[nxt_l[loc]][delta + 1], dp[loc][delta]); } if (delta > 0) { if (nxt_r[loc] > L) { add_mod(info.pref_r[delta - 1], dp[loc][delta]); } else { add_mod(dp[nxt_r[loc]][delta - 1], dp[loc][delta]); } } } if (loc) { add_mod(info.cnt_within, dp[loc][0]); } } debug() << imie(info.cnt_within); debug() << imie(info.pref_l); debug() << imie(info.pref_r); for (int i = 0; i <= L; ++i) { memset(dp[i], 0, sizeof(dp[i])); } for (int loc = L; loc > 0; --loc) { dp[loc][0] = 1; for (int delta = 0; delta <= L + 2; ++delta) { if (nxt_l[loc] <= L) { add_mod(dp[loc][delta], dp[nxt_l[loc]][delta + 1]); } if (delta > 0 && nxt_r[loc] <= L) { add_mod(dp[loc][delta], dp[nxt_r[loc]][delta - 1]); } } } for (int delta = 0; delta <= L + 1; ++delta) { if (nxt_l[0] <= L) { info.suf_l[delta] = dp[nxt_l[0]][delta]; } if (nxt_r[0] <= L) { info.suf_r[delta] = dp[nxt_r[0]][delta]; } } debug() << imie(info.suf_l); debug() << imie(info.suf_r); return info; } const ll large_mod = 5LL * mod * mod; int ComputeResult(const StringInfo &lhs, const StringInfo &rhs) { ll ans = lhs.cnt_within; for (int i = 0; i < min(SZ(lhs.pref_l), SZ(rhs.pref_l)); ++i) { ans += (ll)lhs.pref_l[i] * rhs.suf_l[i]; ans += (ll)lhs.pref_r[i] * rhs.suf_r[i]; if (ans >= large_mod) { ans -= large_mod; } } return ans % mod; } int main() { ios_base::sync_with_stdio(0); cin.tie(0); cout << fixed << setprecision(11); cerr << fixed << setprecision(6); int n; cin >> n; for (int i = 0; i < n; ++i) { string s; cin >> s; string_infos.push_back(ProcessString(s)); } for (int i = 0; i < n; ++i) { for (int j = 0; j < n; ++j) { cout << ComputeResult(string_infos[i], string_infos[j]) << " "; } cout << "\n"; } } |