Compilare: user.cpp: In function ‘int main()’: user.cpp:35:36: 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:36:38: 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:37:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:39:36: 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); ^ user.cpp:48:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &a, &b, &t); ^ user.cpp:26:42: warning: array subscript is below array bounds [-Warray-bounds] if(i + step < n && 1LL * v[a[i + step].poz].x + 1LL * v[a[i + step].poz].y * t <= val) { ^ user.cpp:26:42: warning: array subscript is below array bounds [-Warray-bounds] if(i + step < n && 1LL * v[a[i + step].poz].x + 1LL * v[a[i + step].poz].y * t <= val) { ^