Compilare: user.cpp: In function ‘int main()’: user.cpp:24:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rf.in","r",stdin); ^ user.cpp:25:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rf.out","w",stdout); ^ user.cpp:27:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ user.cpp:32:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&length[i][j]); ^ user.cpp: In function ‘int minDistance(bool*)’: user.cpp:19:12: warning: ‘min_index’ may be used uninitialized in this function [-Wmaybe-uninitialized] return min_index; ^