zoj 3425 Similarity

http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=4109

模拟+KM。表示只会写模拟。。。手贱把'\0' 写成' \n ' 而导致RE。

#include <stdio.h>#include <string.h>#include <vector>#include <iostream>using namespace std;#define _clr(x) memset(x,  -1, sizeof(int)*MAXN)#define MAXN 40#define inf 10000000#define FOR(i,s,e) for (int i=(s);(i)<(e);i++) int sign_a[35];int sign_b[35];int mat[40][40];int match1[40];int match2[40];int km(int m, int n, int mat[][MAXN], int* match1, int* match2){ int s[MAXN]; int t[MAXN]; int l1[MAXN]; int l2[MAXN]; int p; int q; int ret = 0; int i; int j; int k; for (i=0; i<m; i++) {  for (l1[i]=-inf,j=0; j<n; j++)   l1[i] = mat[i][j] > l1[i] ? mat[i][j]:l1[i];  if (l1[i] == -inf) return -1; } for (i=0; i<n; l2[i++] = 0); for (_clr(match1), _clr(match2), i=0; i<m; i++) {  for ((_clr(t)), s[p=q=0]=i; p<=q && match1[i] < 0; p++)   for (k=s[p],j=0; j < n && match1[i] < 0; j++)    if (l1[k] + l2[j] == mat[k][j] && t[j] < 0)    {     s[++q] = match2[j],t[j] = k;     if (s[q] < 0)      for (p = j; p>=0; j=p)       match2[j] = k =t[j], p = match1[k], match1[k] = j;    }      if (match1[i] < 0)      {       for (i--,p=inf,k=0; k<=q; k++)        for (j=0; j<n; j++)         if (t[j] < 0 && l1[s[k]] + l2[j] - mat[s[k]][j] < p)          p = l1[s[k]] + l2[j] - mat[s[k]][j];         for (j=0; j<n; l2[j]+=t[j]<0?0:p,j++);         for (k = 0; k <= q; l1[s[k++]]-=p);      }    }    for (i=0; i<m; i++)    {     if (match1[i] < 0) return -1;     if (mat[i][match1[i]] <= -inf) return -1;     ret+=mat[i][match1[i]];    } return ret;}char s[20010];char tea[20010];char stu[20010];int main(){    int num; int t,n,m,k; //freopen("in.txt","r",stdin); scanf("%d",&t); while (t--) {  scanf("%d%d%d",&n,&k,&m);        getchar();  gets(s);  num = 0;  for (int i=0; s[i] ; i++)  if (s[i]!=' ' )        tea[num++]=s[i];        tea[num]='\0';  memset(sign_a,0,sizeof(sign_a));   num = 1;   for (int i=0; tea[i]; i++)  if (tea[i]>='A' && tea[i]<='Z' && sign_a[tea[i]-'A'] == 0)   sign_a[tea[i]-'A']=num++;   FOR(i,0,m)  {     memset(sign_b,0,sizeof(sign_b));   memset(mat,0,sizeof(mat));   gets(s);   num = 0;   for (int i=0; s[i]; i++)   if (s[i]!=' ')   stu[num++]=s[i];   stu[num]='\0';            num =1;   for (int i=0; stu[i]; i++)   if (stu[i]>='A' && stu[i]<='Z' && sign_b[stu[i]-'A'] == 0)    sign_b[stu[i]-'A']=num++;            for (int i=0; tea[i]; i++)                mat[sign_a[tea[i]-'A']-1][sign_b[stu[i]-'A']-1]++;    printf("%.4lf\n",km(k,k,mat,match1,match2)*1.0/n );  } } return 0;}

http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=4109

模拟+KM。表示只会写模拟。。。手贱把'\0' 写成' \n ' 而导致RE。