Compilare: user.cpp: In function ‘int main()’: user.cpp:9:17: warning: unused variable ‘m’ [-Wunused-variable] long long n,m,i,j,t,q,mi,ma,st,dr,mj,r,c,su,la; ^ user.cpp:9:21: warning: unused variable ‘j’ [-Wunused-variable] long long n,m,i,j,t,q,mi,ma,st,dr,mj,r,c,su,la; ^ user.cpp:7:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sir7.in","r",stdin); ^ user.cpp:8:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sir7.out","w",stdout); ^ user.cpp:42:18: warning: ‘la’ may be used uninitialized in this function [-Wmaybe-uninitialized] c=(ma-la)/n; ^