#include
#include
using?namespace?std;


int?strMatching（string?strstring?substr）{
????int?flag=0;
????int?i=str.length（）j=substr.length（）;

????if（i????????return?-1;
????while（i>0???&&??j>0）{
????????if（str[i]==substr[j]）{
????????????i--;
????????????j--;
????????}
????????else{
????????????i=i+j+1;
????????????j=0;
????????}
????????if（!j）{
????????????flag=1;
????????????break;
????????}
????}
????if（flag）
????????return?（i+1）;
????else?return?-1;
}