# RPS v7.77

 Author tzoidis Submission date 2016-07-18 22:51:44.767895 Rating 6747 Matches played 403 Win rate 69.23

Use rpsrunner.py to play unranked matches on your computer.

## Source code:

``````import random

k2i={'R':0,'P':1,'S':2}
i2k={0:'R',1:'P',2:'S'}

def mdl(N):
N%=3
if N<0:
N+=3
return N

if not input:
mRNA=""
tRNA=""
hist=[[0]*3]*3
eval=[0]*3
flag=[False]*2
subs=[[0]*6]*2
prin=[[[0]*6]*2]*4
meta=[0]*4
output=random.choice("RPS")
else:
for i in range(4):
x=0
y=0
for j in range(2):
for k in range(6):
if prin[i][j][k]>prin[i][x][y]:
x=j
y=k
if flag[x]:
re=mdl(subs[x][y]-k2i[input])
if re==2:
meta[i]-=1
else:
meta[i]+=re
for j in range(2):
for k in range(6):
prin[1][j][k]*=0.9
prin[3][j][k]*=0.9
if flag[j]:
re=mdl(subs[j][k]-k2i[input])
if re==0:
for i in range(2,4):
prin[i][j][k]-=0.1
elif re==1:
for i in range(4):
prin[i][j][k]+=1
elif re==2:
for i in range(4):
if i<2 or prin[i][j][k]<2:
prin[i][j][k]-=1
else:
prin[i][j][k]*=0.5
tRNA+=input
mRNA+=output
for i in range(3):
for j in range(3):
hist[i][j]=0
i=-1
j=min(5,len(tRNA))
while i<0 and j>1:
j-=1
RNA=tRNA[-j:]
DNA=mRNA[-j:]
i=tRNA.find(RNA,0,-1)
if i<0:
for k in range(len(tRNA)):
hist[0][k2i[tRNA[k]]]+=1
hist[1][k2i[mRNA[k]]]+=1
while i>=0:
if mRNA[i:(i+j-1)]==DNA:
hist[0][k2i[tRNA[i+j]]]+=1
hist[1][k2i[mRNA[i+j]]]+=1
hist[2][k2i[tRNA[i+j]]]+=1
i=tRNA.find(RNA,i+1,-1)
flag[0]=((hist[0][0]<>hist[0][1] or hist[0][1]<>hist[0][2]) and
(hist[1][0]<>hist[1][1] or hist[1][1]<>hist[1][2]))
flag[1]=(hist[2][0]<>hist[2][1] or hist[2][1]<>hist[2][2])
if flag[0]:
for i in range(3):
eval[i]=hist[0][mdl(i-1)]-hist[0][mdl(i+1)]
j=eval.index(max(eval))
for i in range(3):
subs[0][i]=mdl(j-i)
for i in range(3):
eval[i]=hist[1][mdl(i-1)]-hist[1][mdl(i+1)]
j=eval.index(max(eval))
for i in range(3):
subs[0][i+3]=mdl(j-i+1)
if flag[1]:
for i in range(3):
eval[i]=hist[2][mdl(i-1)]-hist[2][mdl(i+1)]
j=eval.index(max(eval))
for i in range(3):
subs[1][i]=mdl(j-i)
i=-1
j=min(5,len(mRNA))
while i<0 and j>1:
j-=1
RNA=mRNA[-j:]
i=mRNA.find(RNA,0,-1)
flag[1]=flag[1] and (i>=0)
if flag[1]:
k=mdl(k2i[mRNA[i+j]]-1)
for i in range(3):
subs[1][i+3]=mdl(k-i)
output=random.choice("RPS")
i=meta.index(max(meta))
if max(meta)>0:
x=0
y=0
for j in range(2):
for k in range(6):
if prin[i][j][k]>prin[i][x][y]:
x=j
y=k
if flag[x] and prin[i][x][y]>0:
output=i2k[subs[x][y]]``````