Compilare: main.cpp: In function 'int main()': main.cpp:52:16: warning: operation on 'fact[i]' may be undefined [-Wsequence-point] fact[i]=fact[i]=(fact[i-1]*i)%MOD; ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:63:44: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long unsigned int' [-Wformat=] printf("%d\n",(1LL*dp[x]*comb(k,x))%MOD); ^ main.cpp:43:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("xnumere.in","r",stdin); ^ main.cpp:44:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("xnumere.out","w",stdout); ^ main.cpp:46:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&k,&x,&n); ^