尺取模板

Posted 2020-10-31 tokisaki-kurumi-

int l,r;
int len;
l = r = 1; 
while(l<len){  
    while( r<len && !ok() ){  
        update();
        r++;  
    }  
      
    if( !ok() ) break;
  
    update();
    l++;  
}