Compilare: user.cpp: In function ‘int main()’: user.cpp:31:9: warning: variable ‘minC’ set but not used [-Wunused-but-set-variable] int minC = INF; ^ user.cpp:29:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d%d", &n, &m, &x, &t); ^ user.cpp:36:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &a[i][j]); ^