Compilare: main.cpp: In function 'int main()': main.cpp:53:17: warning: unused variable 'dmax' [-Wunused-variable] int i,n,m,j,dmax; ^~~~ main.cpp:54:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("coach.in","r",stdin); ^ main.cpp:55:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("coach.out","w",stdout); ^ main.cpp:56:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&t); ^ main.cpp:59:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&cal[i]); ^ main.cpp:63:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x[i],&y[i],&l[i]); ^