Compilare: user.cpp: In function ‘int main()’: user.cpp:53:53: warning: value computed is not used [-Wunused-value] if(n<=k) {printf("%d\n",(D[n][k]-D[n][k-1]+Mod))%Mod;return 0;} ^ user.cpp:48:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pkinv.in","r",stdin); ^ user.cpp:49:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pkinv.out","w",stdout); ^ user.cpp:51:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k);if(k==0) {printf("1\n");return 0;} ^