Compilare: main.cpp: In function 'int main()': main.cpp:7:37: 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); ^ main.cpp:8:39: 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); ^ main.cpp:10:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:13:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &j, &id); ^ main.cpp:58:64: warning: 'jud_smax' may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d %d\n",jud_smax,v[jud_smax][v[jud_smax][0]--]); ~~~~~~~~~~~~~^ main.cpp:51:9: warning: 'jud_fmax' may be used uninitialized in this function [-Wmaybe-uninitialized] if(jud_fmax != ant) ^~