Compilare: user.cpp: In function ‘void precompute()’: user.cpp:41:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(position==v[i]) ^ user.cpp:53:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(position==v[i]) ^ user.cpp: In function ‘int main()’: user.cpp:4:17: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] #define INF (1LL<<63-1) ^ user.cpp:106:16: note: in expansion of macro ‘INF’ answer=INF; ^ user.cpp:93:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sport2.in","r",stdin); ^ user.cpp:94:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sport2.out","w",stdout); ^ user.cpp:96:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&tests); ^ user.cpp:98:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:100:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&v[i]); ^ user.cpp: In function ‘void backtracking(int, long long int, long long int, int)’: user.cpp:76:9: warning: ‘k’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(k==0) ^ user.cpp:79:21: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] answer=k; ^