Compilare: user.cpp: In function ‘int main()’: user.cpp:8:22: warning: unused variable ‘pp’ [-Wunused-variable] int n,i,nj=0,nr=0,j,pp,k,l,c,max1,max2,j1,j2,jmax=-1,nr15=0; ^ user.cpp:8:25: warning: unused variable ‘k’ [-Wunused-variable] int n,i,nj=0,nr=0,j,pp,k,l,c,max1,max2,j1,j2,jmax=-1,nr15=0; ^ user.cpp:8:27: warning: unused variable ‘l’ [-Wunused-variable] int n,i,nj=0,nr=0,j,pp,k,l,c,max1,max2,j1,j2,jmax=-1,nr15=0; ^ user.cpp:6:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("concurs2.in","r",stdin); ^ user.cpp:7:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("concurs2.out","w",stdout); ^ user.cpp:9:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:11:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&j,&c); ^ user.cpp:50:16: warning: ‘j2’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[j2][0]--; ^ user.cpp:49:16: warning: ‘j1’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[j1][0]--; ^