Compilare: main.cpp: In function 'int main()': main.cpp:9:9: warning: unused variable 'i' [-Wunused-variable] int n,k,i,d,e; ^ main.cpp:7:30: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("teste.in","r",stdin); ^ main.cpp:8:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("teste.out","w",stdout); ^ main.cpp:10:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^