Compilare: main.cpp: In function 'int main()': main.cpp:74:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("critice.in", "r", stdin); ^ main.cpp:77:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ main.cpp:80:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&a,&b,&c); ^ main.cpp: In function 'bool bfs()': main.cpp:21:18: warning: iteration 1004 invokes undefined behavior [-Waggressive-loop-optimizations] path[i] =0; ~~~~~~~~~^~ main.cpp:20:20: note: within this loop for(int i = 1;i<=N;i++) ^