bomboane.cpp: In function 'int bellmanford()': bomboane.cpp:27: warning: comparison between signed and unsigned integer expressions bomboane.cpp: In function 'int main()': bomboane.cpp:112: warning: comparison between signed and unsigned integer expressions bomboane.cpp:52: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result bomboane.cpp:65: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result