P - Kyoya and Photobooks CodeForces - 554A(數學,插空法求排列數
大意 :在一段小寫字母組成的字串中插入一個小寫字母,問有幾種情況
InputaOutput
51Input
hiOutput
76
對於每個字母,在左右插空有一種重複的情況,去除即可
為 26*(n+1)-n
#include<stdio.h> #include<string.h> int main(){ char ch[25]; gets(ch); printf("%d",25*(strlen(ch)+1)+1); }
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