Compilare: user.cpp: In function ‘int main()’: user.cpp:24:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("div.in", "r", stdin); ^ user.cpp:25:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("div.out", "w", stdout); ^ user.cpp:28:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &m); ^ user.cpp:15:13: warning: ‘maxj’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(i==j1+1) ^ user.cpp:26:40: note: ‘maxj’ was declared here int n=0, m, i, max=MAX*2, k, maxi, maxj, nr=0, l1, l2; ^ user.cpp:26:34: warning: ‘maxi’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n=0, m, i, max=MAX*2, k, maxi, maxj, nr=0, l1, l2; ^