Compilare: main.cpp: In function 'int main()': main.cpp:37:14: warning: unused variable 'q' [-Wunused-variable] int n,m,i,j,q,nr=2,k; ^ main.cpp:37:16: warning: unused variable 'nr' [-Wunused-variable] int n,m,i,j,q,nr=2,k; ^~ main.cpp:39:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pirati.in","r",stdin); ^ main.cpp:40:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pirati.out","w",stdout); ^ main.cpp:41:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d\n",&n,&m,&k); ^ main.cpp:45:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s",s); ^