Compilare: main.cpp: In function 'int main()': main.cpp:45:27: warning: unused variable 'cnt' [-Wunused-variable] int n, r, l, i, x, y, cnt, maxim; ^~~ main.cpp:45:32: warning: unused variable 'maxim' [-Wunused-variable] int n, r, l, i, x, y, cnt, maxim; ^~~~~ main.cpp: In function 'void get_int(int&)': main.cpp:16:39: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer , sz , 1 , stdin); ^ main.cpp:24:39: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buffer , sz , 1 , stdin); ^ main.cpp: In function 'int main()': main.cpp:43:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lupu.in", "r", stdin); ^ main.cpp:44:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("lupu.out", "w", stdout); ^