Compilare: main.cpp: In function 'int main()': main.cpp:83:14: warning: unused variable 'max' [-Wunused-variable] int min = 0,max=0; ^~~ main.cpp:49:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d", &m, &k, &n); ^ main.cpp:65:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d ", &a[i][j]); ^