Compilare: main.cpp: In function 'int main()': main.cpp:123:9: warning: unused variable 'mxid' [-Wunused-variable] int mxid = 0; ^~~~ main.cpp:95:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("pensula.in", "r", stdin); ^ main.cpp:96:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("pensula.out", "w", stdout); ^ main.cpp: In function 'void cit(int&)': main.cpp:16:54: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(++pz==290000)fread(ax,1,290000,stdin),pz=0; ^ main.cpp:22:54: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] if(++pz==290000)fread(ax,1,290000,stdin),pz=0; ^