Compilare: main.cpp: In function 'int main()': main.cpp:18:40: 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); ^ main.cpp:19:42: 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); ^ main.cpp:23:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &n); ^ main.cpp:25:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &jud); ^ main.cpp:27:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &a[jud][a[jud][0]]); ^ main.cpp:58:18: warning: 'poz2' may be used uninitialized in this function [-Wmaybe-uninitialized] a[poz2][0]--; ~~~~~~~~~^