Compilare: main.cpp: In function 'int C(int)': main.cpp:26:13: warning: unused variable 'i' [-Wunused-variable] int u,w,i,p=0,y,q; ^ main.cpp: In function 'int main()': main.cpp:38:89: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("darb.in","r",stdin),freopen("darb.out","w",stdout),fread(r,M,1,stdin),n=A(); ^ main.cpp:38:89: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:38:89: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result]