Compilare: user.cpp: In function ‘void ReadFile()’: user.cpp:111:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&p,&n,&m); ^ user.cpp:114:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&dragon[i]); ^ user.cpp:118:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&pos1,&pos2,&dist); ^ user.cpp: In function ‘int main()’: user.cpp:154:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dragoni.in","r",stdin); ^ user.cpp:155:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dragoni.out","w",stdout); ^ user.cpp: In function ‘void Dijk(TYPE)’: user.cpp:48:44: warning: iteration 803u invokes undefined behavior [-Waggressive-loop-optimizations] discovered_distance[i][j] = INF; ^ user.cpp:47:9: note: containing loop for(int j=1;j<=50000;++j) ^ user.cpp: In function ‘void Solve()’: user.cpp:139:40: warning: iteration 803u invokes undefined behavior [-Waggressive-loop-optimizations] if(discovered_distance[n][i] < dist_min) ^ user.cpp:138:9: note: containing loop for(int i=1;i<=50000;++i) ^