Compilare: user.cpp: In function ‘int main()’: user.cpp:36:22: warning: left shift count >= width of type [enabled by default] ans = -(1 << 61); ^ user.cpp:38:34: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(fout, "%d\n", ans); ^ user.cpp:28:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &K, &M); ^ user.cpp:30:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &cost[i]); ^ user.cpp:35:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld%lld", &a, &b); ^