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我A了!!(附AC代码)In Reply To:求救 Posted by:yc5_yc at 2012-08-04 20:32:06 #include <cstdio>
#include <string.h>
#include <vector>
#include <map>
#include <algorithm>
#include <string>
#include <iostream>
using namespace std;
const int NMax=30;
int N,L1,L2,connect[NMax];
bool ok[NMax],sta[NMax];
map<string,int> ID1,ID2;
map<int,string> rev1,rev2;
map<int,bool> State;
bool G[NMax][NMax];
bool DFS(int a) {
sta[a]=1;
for(int j=1;j<=N;j++) if(G[a][j]){
if(!connect[j]) {
connect[j]=a;
ok[a]=1;
return 1;
}else if(!sta[connect[j]] && DFS(connect[j])) {
ok[a]=1;
connect[j]=a;
return 1;
}
}
return 0;
}
int sth() {
int ret=0;
for(int i=1;i<=N;i++) connect[i]=0;
for(int i=1;i<=N;i++) ok[i]=0;
for(int i=1;i<=N;i++) {
for(int j=1;j<=N;j++) if(G[i][j]){
if(!connect[j]) {
connect[j]=i;
ok[i]=1;
ret++;
break;
}
}
}
for(int i=1;i<=N;i++) {
for(int j=1;j<=N;j++) sta[j]=0;
if(!ok[i] && DFS(i)) ret++;
}
return ret;
}
bool cmp(int a,int b) {
return rev1[a]<rev1[b];
}
int main()
{
string tmp;
char buf[NMax],buf2[NMax];
scanf("%d",&N);
for(int i=1;i<=N;i++) {
scanf("%s",buf);
int len=strlen(buf);tmp.clear();
for(int j=0;j<len;j++) tmp.push_back(buf[j]);
ID2[tmp]=++L2;rev2[L2]=tmp;
}
for(int i=1;i<=N;i++) for(int j=1;j<=N;j++) G[i][j]=1;
while(scanf("%s",buf),(buf[0]!='Q')) {
scanf("%s",buf2);
int len=strlen(buf2);tmp.clear();
for(int i=0;i<len;i++) tmp.push_back(buf2[i]);
if(buf[0]=='M') {
int ID=ID2[tmp];
//printf("%d\n",ID);
for(int i=1;i<=N;i++) if(!State[i])
G[i][ID]=0;
continue;
}
if(ID1[tmp]==0) {ID1[tmp]=++L1;rev1[L1]=tmp;}
int ID=ID1[tmp];
if(buf[0]=='E') State[ID]=1;
else if(buf[0]=='L') State[ID]=0;
}
//if(-1) puts("YA");
//for(int i=1;i<=N;i++)
// for(int j=1;j<=N;j++) if(G[i][j])
// cout <<rev1[i]<<' '<<rev2[j]<<endl;
int R[NMax];
for(int i=1;i<=N;i++) {
R[i]=-1;
for(int j=1;j<=N;j++) if(G[i][j]){
G[i][j]=0;
int tmp;
if((tmp=sth())<N) {
//printf("%d\n",tmp);
R[i]=j;
G[i][j]=1;
break;
}
G[i][j]=1;
}
}
int res[NMax];
for(int i=1;i<=N;i++) res[i]=i;
sort(res+1,res+N+1,cmp);
//puts("");
for(int i=1;i<=N;i++) {
if(R[res[i]]!=-1) cout <<rev1[res[i]]<<':'<<rev2[R[res[i]]]<<endl;
else cout <<rev1[res[i]]<<':'<<"???"<<endl;
}
getchar(); getchar();
return 0;
}
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