trafic.cpp: In function 'void dijkstra(double*, int)': trafic.cpp:54: warning: comparison between signed and unsigned integer expressions trafic.cpp: In function 'int bfs()': trafic.cpp:76: warning: comparison between signed and unsigned integer expressions trafic.cpp: In function 'int maxflow()': trafic.cpp:95: warning: comparison between signed and unsigned integer expressions trafic.cpp: In function 'int main()': trafic.cpp:163: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result trafic.cpp:164: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result trafic.cpp:167: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result trafic.cpp:170: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result