Compilare: main.cpp: In function 'int main()': main.cpp:21:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int n, m; scanf("%d%d", &n, &m); ^ main.cpp:26:66: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] int x, y, jump, size; scanf("%d%d%d%d", &x, &y, &jump, &size); ^