#include int main(){ int len, val; scanf("%d %d",&len,&val); char str[len]; char *p = str; for(int i = 0;i < len;i++){ scanf("%c",&p[i]); } int count = 1; for(int i = val;i < len;i++){ if(p[i] == '('){ count++; }else{ count--; } //printf("int:%d count:%d str:%c\n",i,count,p[i]); if(count == 0 && p[i] == ')'){ printf("%d",i + 1); break; } } }