Compilare: main.cpp: In function 'int main()': main.cpp:115:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("hacker2.in", "r", stdin); ^ main.cpp:116:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("hacker2.out", "w", stdout); ^ main.cpp:119:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ main.cpp:124:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &u, &v, &w); ^ main.cpp:140:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &u, &D); ^ main.cpp: In function 'void get_diam()': main.cpp:94:37: warning: 'end2' may be used uninitialized in this function [-Wmaybe-uninitialized] maior_dist[i] = dist[i], diam[i] = end2; ~~~~~~~~^~~~~~ main.cpp:83:11: warning: 'end1' may be used uninitialized in this function [-Wmaybe-uninitialized] diam[i] = end1; ~~~~~~~~^~~~~~