Find the running time for below code segment and express it using O$-$notation. Explain

your solution.

for $($int i $=0$; i $<$ n; i$++)$

for $($int j $=$ i$+1$; j $<$ n; j$++)$

for $($int k $=$ j$+1$; k $<$ n; k$++)$

op$()$;