Compilare: main.cpp: In function 'int main()': main.cpp:75:13: warning: unused variable 'j' [-Wunused-variable] int i , j , k , x , y , dif; ^ main.cpp:75:17: warning: unused variable 'k' [-Wunused-variable] int i , j , k , x , y , dif; ^ main.cpp:75:29: warning: unused variable 'dif' [-Wunused-variable] int i , j , k , x , y , dif; ^~~ main.cpp:73:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("petrica.in" , "r" , stdin); ^ main.cpp:74:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("petrica.out" , "w" , stdout); ^ main.cpp:76:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &n); ^ main.cpp:78:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &p[i]); ^