Compilare: user.cpp: In function ‘int main()’: user.cpp:28:9: warning: unused variable ‘i’ [-Wunused-variable] int i , j , k , l , sol = 0 , s = 0 , v , ma = 0 , p = 0; ^ user.cpp:28:13: warning: unused variable ‘j’ [-Wunused-variable] int i , j , k , l , sol = 0 , s = 0 , v , ma = 0 , p = 0; ^ user.cpp:28:17: warning: unused variable ‘k’ [-Wunused-variable] int i , j , k , l , sol = 0 , s = 0 , v , ma = 0 , p = 0; ^ user.cpp:28:56: warning: unused variable ‘p’ [-Wunused-variable] int i , j , k , l , sol = 0 , s = 0 , v , ma = 0 , p = 0; ^ user.cpp:25:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.in", "r", stdin); ^ user.cpp:26:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.out", "w", stdout); ^ user.cpp:31:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%d%d",&v, &n, &m); ^ user.cpp:33:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", a[i]+1); ^