Compilare: main.cpp: In function 'int main()': main.cpp:53:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("retea2.in", "r", stdin); ^ main.cpp:54:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("retea2.out", "w", stdout); ^ main.cpp:55:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ main.cpp:57:75: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] for(int i = 1; i <= n; i++) scanf("%d%d", &cen[i].first, &cen[i].second); ^ main.cpp:60:47: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &bl[i].first, &bl[i].second); ^ main.cpp:72:35: warning: 'idx' may be used uninitialized in this function [-Wmaybe-uninitialized] if(!viz[j] && dp[j] < dp[idx]) ~~~~~~^