Compilare: user.cpp: In function ‘int main()’: user.cpp:15:39: 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:16:41: 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:17:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &p); ^ user.cpp:21:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &j, &e); ^ user.cpp:55:26: warning: ‘jmax2’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[jmax2][0]--; ^ user.cpp:47:30: warning: ‘jmax1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (a[i][0]>max2 && jmax1!=i){ ^