// Paweł Jasiak pj103199 // pj1031999@gmail.com /******************* INCLUDE *******************/ #include <bits/stdc++.h> using namespace std; /****** tr1 extension ******/ #if __cplusplus < 201103LL #include <bits/stdtr1c++.h> using namespace tr1; #endif /****** GNU extension ******/ #ifdef EXT #include <bits/extc++.h> using namespace __gnu_cxx; using namespace __gnu_pbds; #endif /******************* TYPEDEF *******************/ typedef vector<int> VI; typedef long long LL; typedef long double LD; typedef vector<VI> VVI; typedef vector<LL> VLL; typedef vector<double> VD; typedef vector<string> VS; typedef pair<int, int> PII; typedef pair<LL, LL> PLL; typedef vector<PII> VPII; typedef vector<PLL> VPLL; /******************* DEFINE *******************/ #define FOR(x, b, e) for (int x = b; x <= (e); ++x) #define FORD(x, b, e) for (int x = b; x >= (e); --x) #define REP(x, n) for (int x = 0; x < (n); ++x) #define VAR(v, n) __typeof(n) v = (n) #define ALL(c) (c).begin(), (c).end() #define SIZE(x) ((int)(x).size()) #define FOREACH(i, c) for (VAR(i, (c.begin())); i != (c).end(); ++i) #define FOREACHD(i, c) for (VAR(i, (c.rbegin())); i != (c).rend(); ++i) #define WRITE(c) FOREACH(it, (c)) cout << (*it) << " "; #define CLR(x, a) memset((x), (a), sizeof((x))) #define eprintf(...) fprintf(stderr, __VA_ARGS__) #define TIMESTAMP(x) \ eprintf("[" #x "] Time = %.3lfs\n", clock() * 1.0 / CLOCKS_PER_SEC) #define DBG(x) cerr << ">> " << #x << " = " << x << endl; #define ___ \ ios_base::sync_with_stdio(false); \ cin.tie(NULL); \ cout.tie(NULL); #define RAND(a, b) ((rand() % (b - a + 1)) + (a)) #define FLUSH() \ fflush(stdout); \ fflush(stderr); #define HEAP priority_queue #define PB push_back #define ST first #define ND second #define PF push_front #define MP make_pair /******************* VARS *******************/ const int MOD = (int)1e9 + 7; const int MOD2 = (int)1e9 + 9; const int INF = 1000000001; const long long LLINF = (long long)1e18 + 1; const double EPS = 10e-9; const int MAXN = (int)1e6 + 7; const int MX = (int)500 + 7; int n, m; VI V[MX]; VI actual{1}, tmp; VI wzor; /******************* CODE *******************/ bool ok() { bool oks = true; for (int i = 0; i < actual.size(); ++i) { oks = true; for (int j = 0, k = i; j < wzor.size(); ++j, ++k) { if (k >= actual.size()) return false; if (wzor[j] != actual[k]) oks = false; if (!oks) break; } if (oks) return true; } return false; } int main(void) { scanf(" %d %d", &n, &m); FOR(i, 1, n) { int number; scanf("%d", &number); V[i].reserve(number); while (number--) { int tmps; scanf("%d", &tmps); V[i].PB(tmps); } } wzor.reserve(m); REP(i, m) { int tmps; scanf("%d", &tmps); wzor.PB(tmps); } int ile = 1; while (!ok()) { if (ile >= 20) { printf("-1\n"); return 0; } tmp = actual; actual.clear(); FOREACH(it, tmp) FOREACH(ptr, V[*it]) actual.PB(*ptr); ++ile; } printf("%d\n", ile); 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | // Paweł Jasiak pj103199 // pj1031999@gmail.com /******************* INCLUDE *******************/ #include <bits/stdc++.h> using namespace std; /****** tr1 extension ******/ #if __cplusplus < 201103LL #include <bits/stdtr1c++.h> using namespace tr1; #endif /****** GNU extension ******/ #ifdef EXT #include <bits/extc++.h> using namespace __gnu_cxx; using namespace __gnu_pbds; #endif /******************* TYPEDEF *******************/ typedef vector<int> VI; typedef long long LL; typedef long double LD; typedef vector<VI> VVI; typedef vector<LL> VLL; typedef vector<double> VD; typedef vector<string> VS; typedef pair<int, int> PII; typedef pair<LL, LL> PLL; typedef vector<PII> VPII; typedef vector<PLL> VPLL; /******************* DEFINE *******************/ #define FOR(x, b, e) for (int x = b; x <= (e); ++x) #define FORD(x, b, e) for (int x = b; x >= (e); --x) #define REP(x, n) for (int x = 0; x < (n); ++x) #define VAR(v, n) __typeof(n) v = (n) #define ALL(c) (c).begin(), (c).end() #define SIZE(x) ((int)(x).size()) #define FOREACH(i, c) for (VAR(i, (c.begin())); i != (c).end(); ++i) #define FOREACHD(i, c) for (VAR(i, (c.rbegin())); i != (c).rend(); ++i) #define WRITE(c) FOREACH(it, (c)) cout << (*it) << " "; #define CLR(x, a) memset((x), (a), sizeof((x))) #define eprintf(...) fprintf(stderr, __VA_ARGS__) #define TIMESTAMP(x) \ eprintf("[" #x "] Time = %.3lfs\n", clock() * 1.0 / CLOCKS_PER_SEC) #define DBG(x) cerr << ">> " << #x << " = " << x << endl; #define ___ \ ios_base::sync_with_stdio(false); \ cin.tie(NULL); \ cout.tie(NULL); #define RAND(a, b) ((rand() % (b - a + 1)) + (a)) #define FLUSH() \ fflush(stdout); \ fflush(stderr); #define HEAP priority_queue #define PB push_back #define ST first #define ND second #define PF push_front #define MP make_pair /******************* VARS *******************/ const int MOD = (int)1e9 + 7; const int MOD2 = (int)1e9 + 9; const int INF = 1000000001; const long long LLINF = (long long)1e18 + 1; const double EPS = 10e-9; const int MAXN = (int)1e6 + 7; const int MX = (int)500 + 7; int n, m; VI V[MX]; VI actual{1}, tmp; VI wzor; /******************* CODE *******************/ bool ok() { bool oks = true; for (int i = 0; i < actual.size(); ++i) { oks = true; for (int j = 0, k = i; j < wzor.size(); ++j, ++k) { if (k >= actual.size()) return false; if (wzor[j] != actual[k]) oks = false; if (!oks) break; } if (oks) return true; } return false; } int main(void) { scanf(" %d %d", &n, &m); FOR(i, 1, n) { int number; scanf("%d", &number); V[i].reserve(number); while (number--) { int tmps; scanf("%d", &tmps); V[i].PB(tmps); } } wzor.reserve(m); REP(i, m) { int tmps; scanf("%d", &tmps); wzor.PB(tmps); } int ile = 1; while (!ok()) { if (ile >= 20) { printf("-1\n"); return 0; } tmp = actual; actual.clear(); FOREACH(it, tmp) FOREACH(ptr, V[*it]) actual.PB(*ptr); ++ile; } printf("%d\n", ile); return 0; } |