turn1.cpp: In function 'int dfs(int)': turn1.cpp:12: warning: comparison between signed and unsigned integer expressions turn1.cpp: In function 'int verif(int, int)': turn1.cpp:25: warning: comparison between signed and unsigned integer expressions turn1.cpp: In function 'int main()': turn1.cpp:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result turn1.cpp:40: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result