Compilare: main.cpp: In function 'int solve(int, long long int, int*, int*)': main.cpp:7:13: warning: unused variable 'x' [-Wunused-variable] int i, j, x, y; ^ main.cpp:7:16: warning: unused variable 'y' [-Wunused-variable] int i, j, x, y; ^ main.cpp: In function 'int main()': main.cpp:44:60: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d%d%lld", &n, &M1, &C1, &M2, &C2, &k); ^