Compilare: user.cpp: In function ‘void solve1()’: user.cpp:20:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d", &n, &m, &k ); ^ user.cpp:22:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d%d", &x, &y, &xx, &yy ); ^ user.cpp: In function ‘void solve2()’: user.cpp:41:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d", &n, &m, &k ); ^ user.cpp:43:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d%d", &x, &y, &xx, &yy ); ^ user.cpp: In function ‘int main()’: user.cpp:95:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &p ); ^