Compilare: user.cpp: In function ‘int main()’: user.cpp:65:26: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%ld", sol); ^ user.cpp: In function ‘void sift(int)’: user.cpp:80:9: warning: unused variable ‘fs’ [-Wunused-variable] int fs = 2 * i , fd = 2 * i + 1 , good = i; ^ user.cpp:80:22: warning: unused variable ‘fd’ [-Wunused-variable] int fs = 2 * i , fd = 2 * i + 1 , good = i; ^ user.cpp: In function ‘int main()’: user.cpp:29:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lupu.in","r",stdin); ^ user.cpp:30:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("lupu.out","w",stdout); ^ user.cpp:34:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &N, &X, &L); ^ user.cpp:38:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &v[i].x, &v[i].y); ^