Compilare: main.cpp: In function 'int main()': main.cpp:11:11: warning: unused variable 'x' [-Wunused-variable] int i,x,n,con,j,con2; ^ main.cpp:11:21: warning: unused variable 'con2' [-Wunused-variable] int i,x,n,con,j,con2; ^~~~ main.cpp:8:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("chei.in","r",stdin); ^ main.cpp:9:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("chei.out","w",stdout); ^ main.cpp:12:27: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets (v,100005,stdin); ^