Compilare: user.cpp: In function ‘void dijkstra(int, int)’: user.cpp:32:17: warning: unused variable ‘a’ [-Wunused-variable] int a = 0; ^ user.cpp: In function ‘int main()’: user.cpp:103:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&T); ^ user.cpp:106:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&change[i][j]); ^ user.cpp:111:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&Move[i][j]); ^