Compilare: user.cpp: In function ‘int main()’: user.cpp:77:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0;i<pos.size();++i) ^ user.cpp:70:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &N, &M); ^ user.cpp:73:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &P[i]); ^ user.cpp:78:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &T[pos[i]]); ^ user.cpp:82:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &j, &k); ^