Eroare de compilare: main.cpp: In function 'int main()': main.cpp:81:30: error: invalid initialization of non-const reference of type 'int&' from an rvalue of type 'int' readI(n), readI(m), readI(k); ^ main.cpp:27:6: note: initializing argument 1 of 'void readI(int&)' void readI(int &x) { ^~~~~ main.cpp: In function 'char next_char()': main.cpp:21:31: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, DIM, stdin); ^ main.cpp: In function 'int main()': main.cpp:79:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pesaptecarari.in", "r", stdin); ^ main.cpp:80:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pesaptecarari.out", "w", stdout); ^ Non zero exit status: 1