Compilare: main.cpp:5:0: warning: "DPRINTF" redefined #define DPRINTF printf main.cpp:4:0: note: this is the location of the previous definition #define DPRINTF main.cpp: In function 'int main()': main.cpp:25:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &N); ^ main.cpp:38:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^