Compilare: user.cpp: In function ‘int main()’: user.cpp:55:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, m, x, y; ^ user.cpp:53:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kinetic.in", "r", stdin); ^ user.cpp:54:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("kinetic.out", "w", stdout); ^ user.cpp:57:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:59:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a[i], &b[i]); ^ user.cpp:9:9: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(x > y) ^ user.cpp:55:18: note: ‘x’ was declared here int i, j, m, x, y; ^ user.cpp:9:9: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(x > y) ^ user.cpp:55:21: note: ‘y’ was declared here int i, j, m, x, y; ^