salvare.cpp: In function 'void dfs(int, int)': salvare.cpp:20: warning: comparison between signed and unsigned integer expressions salvare.cpp: In function 'int verif(int)': salvare.cpp:56: warning: comparison between signed and unsigned integer expressions salvare.cpp: In function 'int main()': salvare.cpp:74: warning: unused variable 'add' salvare.cpp:74: warning: unused variable 'p' salvare.cpp:75: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result salvare.cpp:77: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result