Compilare: user.cpp:16:28: warning: left shift count >= width of type [enabled by default] const long long inf = 1 << 62; ^ user.cpp: In function ‘int main()’: user.cpp:20:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(F, "%d%d%d ", &n, &m, &k); ^ user.cpp:22:101: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i = 0; i < k; ++ i) fscanf(F, "%d ", &x), t[x] = x, w[x] = 1, pq.push({0, -x}), d[x] = 0; ^ user.cpp:25:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(F, "%d%d%d ", &x, &y, &c); ^