#include <vector>
#include <iostream>
#include <sstream>
#include <math.h>
#include <sys/time.h>
#include <cstdlib>
#include <algorithm>
#include <cassert>
#include <cstring>
#include <fstream>
#include <set>
#include <map>
#include <iomanip>
#include <queue>
#define FOR(i,a,b) for(__typeof(b) i=(a);i<(b);++i)
#define REP(i,a) FOR(i,0,a)
#define FOREACH(x,c) for(__typeof(c.begin()) x=c.begin();x != c.end(); x++)
#define ALL(c) c.begin(),c.end()
#define CLEAR(c) memset(c,0,sizeof(c))
#define SIZE(c) (int) ((c).size())
#define PB push_back
#define MP make_pair
#define X first
#define Y second
#define ULL unsigned long long
#define LL long long
#define LD long double
#define II pair<int, int>
#define DD pair<double, double>
#define FF pair<float,float>
#define VC vector
#define VI VC<int>
#define VVI VC<VI>
#define VVVI VC<VVI>
#define VD VC<double>
#define VS VC<string>
#define VII VC<II>
#define VDD VC<DD>
#define VFF VC<FF>
#define VVD VC<VD>
#define VVVD VC<VVD>
#define VULL VC<ULL>
#define DB(a) cerr << #a << ": " << a << endl;
using namespace std;
template<class T> void print(VC < T > v) {cerr << "[";if (SIZE(v) != 0) cerr << v[0]; FOR(i, 1, SIZE(v)) cerr << "," << v[i]; cerr << "]\n";}
template<class T> string i2s(T &x) { ostringstream o; o << x; return o.str(); }
VS split(string &s, char c = ' ') {VS all; int p = 0, np; while (np = s.find(c, p), np >= 0) {all.PB(s.substr(p, np - p)); p = np + 1;} if (p < SIZE(s)) all.PB(s.substr(p)); return all;}
#define INFTY 100000000
#define MOD 1000000007
int N;
VS T;
int solve(string s){
int L = SIZE(s);
int B = L/2;
VI nextL(L,INFTY);
int cur = INFTY;
for(int i=L-1; i >= 0; i--){
if (s[i] == 'L') cur = i;
nextL[i] = cur;
}
VI nextP(L,INFTY);
cur = INFTY;
for(int i=L-1; i >= 0; i--){
if (s[i] == 'P') cur = i;
nextP[i] = cur;
}
VVI DP = VVI(L,VI(L,0));
VVI DP2 = VVI(L,VI(L,0));
DP[0][0] = 1;
ULL cnt = 0;
FOR(l,1,L+1){
REP(b,B+1) REP(pos,L) if (DP[b][pos] > 0){
int Lpos = nextL[pos];
int Ppos = nextP[pos];
if (Lpos != INFTY)
DP2[b+1][Lpos+1] = (DP2[b+1][Lpos+1]+DP[b][pos])%MOD;
if (b > 0 && Ppos != INFTY){
if (b == 1)
cnt = (cnt+DP[b][pos])%MOD;
if (Ppos < L-1)
DP2[b-1][Ppos+1] = (DP2[b-1][Ppos+1]+DP[b][pos])%MOD;
}
}
DP = DP2;
DP2 = VVI(L,VI(L,0));
}
return cnt;
}
int main(int argc, char *argv[]){
cin >> N;
T.resize(N);
REP(i,N) cin >> T[i];
REP(i,4) {
REP(j,4)
cout << solve(T[i]+T[j]) << " ";
cout << endl;
}
return 0;
}
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 | #include <vector> #include <iostream> #include <sstream> #include <math.h> #include <sys/time.h> #include <cstdlib> #include <algorithm> #include <cassert> #include <cstring> #include <fstream> #include <set> #include <map> #include <iomanip> #include <queue> #define FOR(i,a,b) for(__typeof(b) i=(a);i<(b);++i) #define REP(i,a) FOR(i,0,a) #define FOREACH(x,c) for(__typeof(c.begin()) x=c.begin();x != c.end(); x++) #define ALL(c) c.begin(),c.end() #define CLEAR(c) memset(c,0,sizeof(c)) #define SIZE(c) (int) ((c).size()) #define PB push_back #define MP make_pair #define X first #define Y second #define ULL unsigned long long #define LL long long #define LD long double #define II pair<int, int> #define DD pair<double, double> #define FF pair<float,float> #define VC vector #define VI VC<int> #define VVI VC<VI> #define VVVI VC<VVI> #define VD VC<double> #define VS VC<string> #define VII VC<II> #define VDD VC<DD> #define VFF VC<FF> #define VVD VC<VD> #define VVVD VC<VVD> #define VULL VC<ULL> #define DB(a) cerr << #a << ": " << a << endl; using namespace std; template<class T> void print(VC < T > v) {cerr << "[";if (SIZE(v) != 0) cerr << v[0]; FOR(i, 1, SIZE(v)) cerr << "," << v[i]; cerr << "]\n";} template<class T> string i2s(T &x) { ostringstream o; o << x; return o.str(); } VS split(string &s, char c = ' ') {VS all; int p = 0, np; while (np = s.find(c, p), np >= 0) {all.PB(s.substr(p, np - p)); p = np + 1;} if (p < SIZE(s)) all.PB(s.substr(p)); return all;} #define INFTY 100000000 #define MOD 1000000007 int N; VS T; int solve(string s){ int L = SIZE(s); int B = L/2; VI nextL(L,INFTY); int cur = INFTY; for(int i=L-1; i >= 0; i--){ if (s[i] == 'L') cur = i; nextL[i] = cur; } VI nextP(L,INFTY); cur = INFTY; for(int i=L-1; i >= 0; i--){ if (s[i] == 'P') cur = i; nextP[i] = cur; } VVI DP = VVI(L,VI(L,0)); VVI DP2 = VVI(L,VI(L,0)); DP[0][0] = 1; ULL cnt = 0; FOR(l,1,L+1){ REP(b,B+1) REP(pos,L) if (DP[b][pos] > 0){ int Lpos = nextL[pos]; int Ppos = nextP[pos]; if (Lpos != INFTY) DP2[b+1][Lpos+1] = (DP2[b+1][Lpos+1]+DP[b][pos])%MOD; if (b > 0 && Ppos != INFTY){ if (b == 1) cnt = (cnt+DP[b][pos])%MOD; if (Ppos < L-1) DP2[b-1][Ppos+1] = (DP2[b-1][Ppos+1]+DP[b][pos])%MOD; } } DP = DP2; DP2 = VVI(L,VI(L,0)); } return cnt; } int main(int argc, char *argv[]){ cin >> N; T.resize(N); REP(i,N) cin >> T[i]; REP(i,4) { REP(j,4) cout << solve(T[i]+T[j]) << " "; cout << endl; } return 0; } |
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