(I2
I37
I5
(dp0
Vnecklace.%l
p1
(Vnecklace.cpp
p2
S'#include<bits/stdc++.h>\r\nusing namespace std;\r\nint main()\r\n{string e="",a,s;\r\nlong long t=0,l,u,h=0,j,n,k,i,q[3030]={0},w[30]={0};\r\ncin>>n>>k;\r\ncin>>s;\r\nfor(i=n-1;i>=0;i--){\r\nfor(j=0;j<26;j++)\r\n{u=((int)s[i])-96;\r\nl=((int)(j+\'a\'))-96;\r\nif(l>=10)h=100*u+l;\r\nelse h=10*u+l;\r\nq[h]+=w[j];\r\n}\r\nw[s[i]-97]++;\r\n}\r\nfor(i=0;i<k;i++)\r\n{cin>>a;\r\nu=((int)a[0])-96;\r\nl=((int)a[1])-96;\r\nif(l>=10)h=100*u+l;\r\nelse h=10*u+l;\r\nt+=q[h];\r\n}\r\ncout<<t<<endl;\r\nreturn 0;\r\n}\r\n'
p3
tp4
stp5
.