Compilare: main.cpp: In function 'int main()': main.cpp:52:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("xormax.in","r",stdin); ^ main.cpp:53:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("xormax.out","w",stdout); ^ main.cpp:54:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int n; scanf("%d",&n); ^ main.cpp:58:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int x; scanf("%d",&x); ^ main.cpp:72:11: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d %d %d\n",sol, x+1, y); ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~