#include <bits/stdc++.h>
using namespace std;
#define endl "\n"
#define mp make_pair
#define st first
#define nd second
#define pii pair<int, int>
#define vi vector<int>
#define pb push_back
#define _upgrade ios_base::sync_with_stdio(0), cout.setf(ios::fixed), cout.precision(10), cin.tie(0), cout.tie(0);
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define fwd(i, a, b) for (int i = (a); i < (b); ++i)
#define trav(a, x) for (auto &a : x)
#define all(c) (c).begin(), (c).end()
#define sz(X) (int)((X).size())
typedef long double ld;
typedef unsigned long long ull;
typedef long long ll;
#ifdef LOCAL
ostream &operator<<(ostream &out, string str) {
for (char c : str)
out << c;
return out;
}
template <class L, class R> ostream &operator<<(ostream &out, pair<L, R> p) { return out << "(" << p.st << ", " << p.nd << ")"; }
template <class L, class R, class S> ostream &operator<<(ostream &out, tuple<L, R, S> p) {
auto &[a, b, c] = p;
return out << "(" << a << ", " << b << ", " << c << ")";
}
template <class T> auto operator<<(ostream &out, T a) -> decltype(a.begin(), out) {
out << '{';
for (auto it = a.begin(); it != a.end(); it = next(it))
out << (it != a.begin() ? ", " : "") << *it;
return out << '}';
}
void dump() { cerr << "\n"; }
template <class T, class... Ts> void dump(T a, Ts... x) {
cerr << a << ", ";
dump(x...);
}
#define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__)
#else
#define debug(...) 42
#endif
#define int long long
namespace BRUT {
#define md(a) (a) > mod ? (a)-mod : (a)
const int MAXN = 1209;
const int mod = 1e9 + 7;
int dp[MAXN][MAXN];
int nextL[MAXN], nextR[MAXN];
void clear(int t) {
rep(i, t + 2) rep(j, t + 2) dp[i][j] = 0;
rep(i, t + 2) {
nextL[i] = -1;
nextR[i] = -1;
}
}
int solve(string s) {
clear(sz(s));
for (int i = sz(s) - 1; i >= 0; i--) {
nextL[i] = s[i] == 'L' ? i + 1 : nextL[i + 1];
nextR[i] = s[i] == 'P' ? i + 1 : nextR[i + 1];
}
dp[0][0] = 1;
rep(k, sz(s) + 1) {
int zakres = min(k, sz(s) - k) + 2;
if (nextR[k] != -1)
rep(i, zakres) dp[nextR[k]][i] = md(dp[k][i + 1] + dp[nextR[k]][i]);
if (nextL[k] != -1)
rep(i, zakres) dp[nextL[k]][i + 1] = md(dp[k][i] + dp[nextL[k]][i + 1]);
}
int res = 0;
fwd(k, 1, sz(s) + 1) res = md(res + dp[k][0]);
return res % mod;
}
} // namespace BRUT
int32_t main() {
_upgrade;
int n;
cin >> n;
vector<string> S(n);
rep(i, n) cin >> S[i];
rep(i, n) {
debug(i);
rep(j, n) { cout << BRUT::solve(S[i] + S[j]) << " \n"[j == n - 1]; }
}
}
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 | #include <bits/stdc++.h> using namespace std; #define endl "\n" #define mp make_pair #define st first #define nd second #define pii pair<int, int> #define vi vector<int> #define pb push_back #define _upgrade ios_base::sync_with_stdio(0), cout.setf(ios::fixed), cout.precision(10), cin.tie(0), cout.tie(0); #define rep(i, n) for (int i = 0; i < (n); ++i) #define fwd(i, a, b) for (int i = (a); i < (b); ++i) #define trav(a, x) for (auto &a : x) #define all(c) (c).begin(), (c).end() #define sz(X) (int)((X).size()) typedef long double ld; typedef unsigned long long ull; typedef long long ll; #ifdef LOCAL ostream &operator<<(ostream &out, string str) { for (char c : str) out << c; return out; } template <class L, class R> ostream &operator<<(ostream &out, pair<L, R> p) { return out << "(" << p.st << ", " << p.nd << ")"; } template <class L, class R, class S> ostream &operator<<(ostream &out, tuple<L, R, S> p) { auto &[a, b, c] = p; return out << "(" << a << ", " << b << ", " << c << ")"; } template <class T> auto operator<<(ostream &out, T a) -> decltype(a.begin(), out) { out << '{'; for (auto it = a.begin(); it != a.end(); it = next(it)) out << (it != a.begin() ? ", " : "") << *it; return out << '}'; } void dump() { cerr << "\n"; } template <class T, class... Ts> void dump(T a, Ts... x) { cerr << a << ", "; dump(x...); } #define debug(...) cerr << "[" #__VA_ARGS__ "]: ", dump(__VA_ARGS__) #else #define debug(...) 42 #endif #define int long long namespace BRUT { #define md(a) (a) > mod ? (a)-mod : (a) const int MAXN = 1209; const int mod = 1e9 + 7; int dp[MAXN][MAXN]; int nextL[MAXN], nextR[MAXN]; void clear(int t) { rep(i, t + 2) rep(j, t + 2) dp[i][j] = 0; rep(i, t + 2) { nextL[i] = -1; nextR[i] = -1; } } int solve(string s) { clear(sz(s)); for (int i = sz(s) - 1; i >= 0; i--) { nextL[i] = s[i] == 'L' ? i + 1 : nextL[i + 1]; nextR[i] = s[i] == 'P' ? i + 1 : nextR[i + 1]; } dp[0][0] = 1; rep(k, sz(s) + 1) { int zakres = min(k, sz(s) - k) + 2; if (nextR[k] != -1) rep(i, zakres) dp[nextR[k]][i] = md(dp[k][i + 1] + dp[nextR[k]][i]); if (nextL[k] != -1) rep(i, zakres) dp[nextL[k]][i + 1] = md(dp[k][i] + dp[nextL[k]][i + 1]); } int res = 0; fwd(k, 1, sz(s) + 1) res = md(res + dp[k][0]); return res % mod; } } // namespace BRUT int32_t main() { _upgrade; int n; cin >> n; vector<string> S(n); rep(i, n) cin >> S[i]; rep(i, n) { debug(i); rep(j, n) { cout << BRUT::solve(S[i] + S[j]) << " \n"[j == n - 1]; } } } |
English