bzoj4956: [Wf2017]Secret Chamber at Mount Rushmore

F......loyd?

这范围也是.....

然而大了也不会....

#include<cstdio>
#include<iostream>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<cmath>
using namespace std;
int mp[30][30];
char s1[60],s2[60];
int main()
{
    int n,m;
    scanf("%d%d",&m,&n);
    memset(mp,63,sizeof(mp));
    for(int i=1;i<=26;i++)mp[i][i]=1;
    for(int i=1;i<=m;i++)
    {
        scanf("%s%s",s1+1,s2+1);
        mp[s1[1]-'a'+1][s2[1]-'a'+1]=1;
    }
    
    for(int k=1;k<=26;k++)
        for(int i=1;i<=26;i++)
            if(k!=i)
                for(int j=1;j<=26;j++)
                    if(i!=j&&k!=j)
                        mp[i][j]=min(mp[i][j],mp[i][k]+mp[k][j]);
    while(n--)
    {
        scanf("%s%s",s1+1,s2+1);
        int len1=strlen(s1+1),len2=strlen(s2+1);
        if(len1!=len2){printf("no\n");continue;}
        
        bool bk=false;
        for(int i=1;i<=len1;i++)
            if(mp[s1[i]-'a'+1][s2[i]-'a'+1]>999999999){bk=true;break;}
            
        if(bk==false)printf("yes\n");
        else printf("no\n");
    }
    return 0;
}