hdu 4096

大模拟准定挂好多次，心塞塞的

#include <iostream>#include <stdlib.h>#include <string.h>#include <algorithm>#include <stdio.h>#include <map>using namespace std;map<string,int> nword;map<string,int> vword;int wcnt;bool vis[3005];int head[3005], ecnt;char str[11111];char word[10][100];bool flag = false;void init(){nword.clear();vword.clear();wcnt = ecnt = 1;memset(head, -1, sizeof(head));}struct Edge{int to, next;} E[111111];void Addedge( int u, int v){E[ecnt].to = v;E[ecnt].next = head[u];head[u] = ecnt++;}void dfs(int cur,int aim){vis[cur] = true;if(flag) return ;if(cur == aim){flag = true;return ;}for(int i = head[cur]; i != -1; i = E[i].next){if(!vis[E[i].to]){dfs(E[i].to, aim);if(flag) return ;}}return ;}int main(){int t;scanf("%d",&t);int ca = 1;gets(str);while(t--){init();printf("Case #%d:\n",ca++);while(true){gets(str);int len = strlen(str);if(str[len - 1] == '!') break;else if(str[len - 1] == '.'){str[len - 1] = '\0';int u, v;if(sscanf(str,"%s%s%s%s%s%s",word[0], word[1], word[2], word[3], word[4], word[5]) != 6){sscanf(str, "%s%s%s", word[2], word[3], word[4]);string a, b;a = word[2];b = word[4];if(nword.find(a) == nword.end()) nword[a] = wcnt++;if(word[3][0] == 'a'){if(nword.find(b) == nword.end())nword[b] = wcnt++;Addedge(nword[a], nword[b]);}else{if(vword.find(b) == vword.end())vword[b] = wcnt++;Addedge(nword[a], vword[b]);}}else{sscanf(str,"%s%s%s%s%s%s",word[2], word[2], word[2], word[2], word[3], word[4]);string a, b;a = word[2];b = word[4];if(vword.find(a) == vword.end()) vword[a] = wcnt++;if(word[3][0] == 'a'){if(nword.find(b) == nword.end()) nword[b] = wcnt++;Addedge(vword[a], nword[b]);}else{if(vword.find(b) == vword.end()) vword[b] = wcnt++;Addedge(vword[a], vword[b]);}}}else{str[len-1] = '\0';int u, v;if(sscanf(str,"%s%s%s%s%s%s",word[0], word[1], word[2], word[3], word[4], word[5]) != 6){sscanf(str, "%s%s%s", word[3], word[2], word[4]);string a, b;a = word[2];b = word[4];if(nword.find(a) == nword.end()) nword[a] = wcnt++;if(word[3][0] == 'a'){if(nword.find(b) == nword.end())nword[b] = wcnt++;u = nword[a], v = nword[b];}else{if(vword.find(b) == vword.end())vword[b] = wcnt++;u = nword[a], v = vword[b];}flag = false;memset(vis, false, sizeof(vis));dfs(u, v);if(flag)putchar('Y');elseputchar('M');}else{sscanf(str,"%s%s%s%s%s%s",word[3], word[3], word[3], word[3], word[2], word[4]);string a, b;a = word[2];b = word[4];if(vword.find(a) == vword.end()) vword[a] = wcnt++;sscanf(str,"%s",word[3]);if(word[3][0] == 'a'){if(nword.find(b) == nword.end())nword[b] = wcnt++;u = vword[a], v = nword[b];}else{if(vword.find(b) == vword.end())vword[b] = wcnt++;u = vword[a], v = vword[b];}flag = false;memset(vis, 0,sizeof(vis));dfs(u, v);if(flag)  putchar('Y');else  putchar('M');}}}puts("");}return 0;}