Revision f6ca3e67-fc50-4613-b787-2b2b6fd7919e - Code Golf Stack Exchange

# [C (gcc)], 125 bytes

<!-- language-all: lang-c -->

 f(L,n)char**L;{int i,l,c,F=strlen(*L),s=-F;for(l=i=0;i<n;l=c)c
 =strlen(L[i++]),s+=c-l;s=n>1?s||F<2?abs(s)^n-1?0:3:n^F?2:1:0;}

[Try it online!][TIO-jovj25t7]

[C (gcc)]: https://gcc.gnu.org/
[TIO-jovj25t7]: https://tio.run/##bVFNb@IwED0nv8J1t1onMRUBSiVMyo0Ttz0SugrGBEvphM2ErlaU305tJwi6zcXz4fee541lL5fyfK9BFoeNIlOsKw354@7Fv@1tdGla5y1bcAjkLqvCcCGOGmqiecElnyeGVyhg4SLgmPTmYltWrEh00hd6CqJIZCD9C2ix1FG0MsAokb1CYAIv8Qw/PubTwSxbI8PgFXrxrD8ZTuB1PhtM4klfnM7vpd6QnMkSsCZ2CBKGhQaFnNhJIPCPvnd7i7tsr3C5Igk50jeFSDmh@OeQVcpmlZJ1BnnhCmO7yU/C96wcmuh7xgZhzqcR6QsTpgRMiKLA97z9oUbmRljqVeAIaHBb1o4FTW9vVlpvGU3hYUPYAwYppGAeNYh2RLTsk@/bl94yDeybl1phHbdWfvxO0p92aJvQJklp0xKY/XMe/icPrmSLSymUzjfJ2q3Y0G4mpeK@U2R4EbGoi9CvRminsakfU3uY3KPOnuiUGt2YoWVlqepdAb/V@mu8mHB31wh36jy1Oqoqc1iXKrdYs34XMS@gkzX@xupCPbeogduNPdYO53s5cx/Cych@cVMNOBlfq@GXavSleuJkeK3GnMTX6rm5O50/AQ "C (gcc) – Try It Online"