Compilare: main.cpp: In function 'int main()': main.cpp:205:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("elicoptere.in", "r", stdin); ^ main.cpp:206:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("elicoptere.out", "w", stdout); ^ main.cpp:209:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &test_case, &n, &k); ^ main.cpp:214:60: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d", &x1, &y1, &x2, &y2, &x3, &y3); ^