/* >>~~ UVa Online Judge ACM Problem Solution ~~<< ID: 10044 Name: Erdos Numbers Problem: https://onlinejudge.org/external/100/10044.pdf Language: C++ Author: Arash Shakery Email: arash.shakery@gmail.com */ #include #include #include #include #include #include using namespace std; #define INF 536870912 #define MAXN 5001 #define MAXL 20000 int graph[MAXN][MAXN], adj[MAXN][MAXN], deg[MAXN]; int d[MAXN], q[MAXN], inq[MAXN], qs; #define CLR( x, v ) memset( x, v, sizeof( x ) ) #define BUBL { \ t = q[i]; q[i] = q[j]; q[j] = t; \ t = inq[q[i]]; inq[q[i]] = inq[q[j]]; inq[q[j]] = t; } int dijkstra( int n, int s, int t ) { CLR( d, 9 ); CLR( inq, -1 ); d[s] = qs = 0; inq[q[qs++] = s] = 0; while( qs ) { // get the minimum from the q int u = q[0]; inq[u] = -1; // bubble down q[0] = q[--qs]; if( qs ) inq[q[0]] = 0; for( int i = 0, j = 2*i + 1, t; j < qs; i = j, j = 2*i + 1 ) { if( j + 1 < qs && d[q[j + 1]] < d[q[j]] ) j++; if( d[q[j]] >= d[q[i]] ) break; BUBL; } // relax neighbours for( int k = 0, v = adj[u][k]; k < deg[u]; v = adj[u][++k] ) { int newd = d[u] + graph[u][v]; if( newd < d[v] ) { d[v] = newd; if( inq[v] < 0 ) { inq[q[qs] = v] = qs; qs++; } // bubble up for( int i = inq[v], j = ( i - 1 )/2, t; d[q[i]] < d[q[j]]; i = j, j = ( i - 1 )/2 ) BUBL; } } } return d[t]; } char line[MAXL]; int ex[MAXN*MAXN], ey[MAXN*MAXN]; int main(){ int T, p, n; cin>>T; for(int cse=1; cse<=T; cse++) { int cnt = 0, ec = 0; map ids; ids["Erdos, P."] = cnt++; cin>>p>>n; while(getchar()!='\n'); for (int i=0; i cur; string name; bool ff = false; for (char* s=strtok(line, " ,"); s; s=strtok(NULL, " ,")) { if (ff) { ff = false; name = name + ", " + s; int id = 0; if (name != "Erdos, P.") { id = ids[name]; if (id == 0) id = ids[name] = cnt++; } for (int j=cur.size()-1; j>=0; j--) { int k = cur[j]; if (k!=id) { ex[ec] = k; ey[ec++] = id; } } cur.push_back(id); } else { ff = true; name = s; } } } for (int i=0; isecond); cout << line << " "; if (res >= cnt) cout << "infinity\n"; else cout << res << endl; } } }