dep.cpp: In function 'void dfs_final(int)': dep.cpp:12: warning: comparison between signed and unsigned integer expressions dep.cpp:18: warning: comparison between signed and unsigned integer expressions dep.cpp: In function 'int main()': dep.cpp:34: warning: unused variable 'vecin' dep.cpp:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result dep.cpp:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result