Compilare: user.cpp:12:53: warning: integer overflow in expression [-Woverflow] int distance[50001], visited[50001], OO = (1 << 31) - 1; ^ user.cpp: In function ‘void read(int&)’: user.cpp:85:31: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] for(x = 0; ch[poz] >= '0' && ch[poz] <= '9' || ch[poz] == '-'; ^ user.cpp: In function ‘int main()’: user.cpp:94:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bellmanford.in", "r", stdin); ^ user.cpp:95:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bellmanford.out", "w", stdout); ^ user.cpp: In function ‘void read(int&)’: user.cpp:81:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(ch[0] == '\0' ) fread(ch, 1, hg, stdin); ^ user.cpp:83:10: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] else for(; (ch[poz] < '0' || ch[poz] > '9') && ch[poz] != '-'; verf); ^ user.cpp:85:5: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] for(x = 0; ch[poz] >= '0' && ch[poz] <= '9' || ch[poz] == '-'; ^