Compilare: user.cpp: In function ‘int main()’: user.cpp:102:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("razbunare.in", "r", stdin); ^ user.cpp:103:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("razbunare.out", "w", stdout); ^ user.cpp:105:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &l, &q); ^ user.cpp:106:83: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i = 1; i <= l; i++) scanf("%d%d%d%d", &E[i].x, &E[i].y, &E[i].a, &E[i].r); ^ user.cpp:107:96: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i = 1; i <= q; i++) scanf("%d%d%d%d", &Q[i].u, &Q[i].v, &Q[i].a, &Q[i].b), Q[i].id = i; ^