# Codeforces The World is a Theatre

**Problem Statement : <a href="http://codeforces.com/problemset/problem/131/C"> Click here. </a>**
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I have approached at this formula for this question. <br>
Assume C[n][r] = n!/(n-r)!*(r!)
<br><b>
ans = c[n][4] * c[m][1] * c[n+m-5][t-5];</b> <-- this is the formula i've got.<br> Please correct me, Where I've gone wrong?