Compilare: main.cpp: In function 'void bfs(int)': main.cpp:44:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k.rasp.size()==2*n) ~~~~~~~~~~~~~^~~~~ main.cpp:46:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<k.rasp.size();i++) ~^~~~~~~~~~~~~~ main.cpp:56:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[start_node].size();i++) ~^~~~~~~~~~~~~~~~~~~~~ main.cpp:70:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[k.rasp.back()].size();i++) ~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void citire(int, int)': main.cpp:24:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^ main.cpp: In function 'int main()': main.cpp:92:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dungeon.in", "r", stdin); ^ main.cpp:93:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dungeon.out", "w", stdout); ^ main.cpp:95:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:98:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^