Compilare: main.cpp: In function 'int main()': main.cpp:23:11: warning: unused variable 'prec' [-Wunused-variable] long long prec=1LL*n*m*(k-1),prec2=1LL*n*m; ^~~~ main.cpp:23:30: warning: unused variable 'prec2' [-Wunused-variable] long long prec=1LL*n*m*(k-1),prec2=1LL*n*m; ^~~~~ main.cpp:4:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tablou.in","r",stdin); ^ main.cpp:5:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("tablou.out","w",stdout); ^ main.cpp:8:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n",&n,&m); ^ main.cpp:16:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&k); ^ main.cpp:19:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d",&l1,&c1,&l2,&c2,&col); ^