Compilare: main.cpp:2:0: warning: ignoring #pragma GCC [-Wunknown-pragmas] #pragma GCC ("O3") main.cpp:3:0: warning: ignoring #pragma GCC [-Wunknown-pragmas] #pragma GCC ("unroll_loops") main.cpp: In function 'void R(int&)': main.cpp:32:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%d", &x) ; ^ main.cpp: In function 'void R(i64&)': main.cpp:39:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (in, "%lld", &x) ; ^