Compilare: main.cpp: In function 'int main()': main.cpp:27:16: warning: unused variable 'sol' [-Wunused-variable] int n, i, j, sol ; ^~~ main.cpp:28:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &n ) ; ^ main.cpp:30:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &v[i] ) ; ^