work/source:46: error: ‘dup’ does not name a type
work/source: In function ‘void input()’:
work/source:49: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result
work/source:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result
work/source:56: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result
work/source: In function ‘int find_start(int)’:
work/source:88: error: ‘f’ was not declared in this scope
work/source:90: error: ‘f’ was not declared in this scope
work/source: In function ‘void solve2()’:
work/source:98: error: ‘f’ was not declared in this scope
work/source:106: error: ‘f’ was not declared in this scope
