Compilare: user.cpp: In function ‘int main()’: user.cpp:22:70: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d%d%d%d", &n, &m, &k, &s.x, &s.y, &ds.x, &ds.y); ^ user.cpp:38:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x, &y); ^ user.cpp:62:14: warning: ‘nw1’ may be used uninitialized in this function [-Wmaybe-uninitialized] nw1 = (nw1 * nw2) % MOD; ^ user.cpp:62:14: warning: ‘nw2’ may be used uninitialized in this function [-Wmaybe-uninitialized]