Compilare: user.cpp:6:23: warning: integer overflow in expression [-Woverflow] long long val=(100000*2000000001),dp1[51],dp2[51]; ^ user.cpp: In function ‘int main()’: user.cpp:21:28: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] dp2[i]=dp1[i-1]+a*1<<(i-1); ^ user.cpp:10:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hacker3.in","r",stdin); ^ user.cpp:11:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hacker3.out","w",stdout); ^ user.cpp:12:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&a,&b); ^ user.cpp:16:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^