Compilare: user.cpp: In function ‘void BFS(std::pair<int, int>)’: user.cpp:42:12: warning: unused variable ‘i’ [-Wunused-variable] int x, y, i, j; ^ user.cpp: In function ‘int main()’: user.cpp:76:9: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y; ^ user.cpp:76:12: warning: unused variable ‘x’ [-Wunused-variable] int i, j, x, y; ^ user.cpp:76:15: warning: unused variable ‘y’ [-Wunused-variable] int i, j, x, y; ^ user.cpp: In function ‘void citire()’: user.cpp:18:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:28:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &c); ^ user.cpp:30:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c", &c); ^ user.cpp: In function ‘int main()’: user.cpp:78:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("muzeu.in", "r", stdin); ^ user.cpp:79:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("muzeu.out", "w", stdout); ^