Compilare: main.cpp: In function 'int main()': main.cpp:21:16: warning: unused variable 'j' [-Wunused-variable] int n, p, i, j, sol; ^ main.cpp:21:19: warning: unused variable 'sol' [-Wunused-variable] int n, p, i, j, sol; ^~~ main.cpp:24:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &p); ^