croco.cpp: In function 'bool bellman()': croco.cpp:32: warning: unused variable 'j' croco.cpp: In function 'void print_sol()': croco.cpp:99: warning: comparison between signed and unsigned integer expressions croco.cpp: In function 'int main()': croco.cpp:106: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result croco.cpp:107: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result croco.cpp:109: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result croco.cpp:112: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result