Compilare: user.cpp: In function ‘int main()’: user.cpp:15:12: warning: unused variable ‘m’ [-Wunused-variable] int n, m, i, j, x, y, p, s, k; ^ user.cpp:15:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, x, y, p, s, k; ^ user.cpp:15:24: warning: unused variable ‘y’ [-Wunused-variable] int n, m, i, j, x, y, p, s, k; ^ user.cpp:12:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bleach.in","r",stdin); ^ user.cpp:13:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bleach.out","w",stdout); ^ user.cpp:18:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:20:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^