//#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; typedef signed long long ll; #define pp(...) (void)printf(__VA_ARGS__) #define For(x,to) for(x=0;x<(to);x++) #define ForAuto(x,arr) for(auto& x:arr) #define ForBeginEnd(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++) #define All(a) (a.begin()),(a.end()) #define Zeros(a) memset(a,0,sizeof(a)) #define Minus(a) memset(a,0xff,sizeof(a)) #define PI 3.14159265 #define EPS (1e-10) #define EPS_eq(a,b) (abs((a)-(b)) < EPS) #pragma GCC diagnostic ignored "-Wconversion" //#define int long long #define INF 1000*1000 int dxy[] = {0, 1, 0, -1, 0}; typedef pair P; void pp_int(int x){ printf("%d\n", x); }; int i,j,k; ll M = 100000009; //ios::sync_with_stdio(false); //------------------------------------------------- // i番の製品を作るのに必要なj番の個数 int dp[105][105]; int n,m; set buy; vector > pqr[105]; void rec(int dst){ if(dp[dst][0]>=0){ return; } memset(dp[dst], 0, sizeof(dp[dst])); if(buy.count(dst)){ dp[dst][dst] = 1; return; } for(int i=0;i pointer = pqr[dst][i]; int src = pointer.first; int num = pointer.second; rec(src); for(int j = 1; j <= n - 1; j++){ dp[dst][j] += num * dp[src][j]; } } return; } signed main() { cin>>n>>m; // cout<>p>>q>>r; pqr[r].push_back({p, q}); buy.erase(r); } rec(n); // cout<