Compilare: user.cpp: In function ‘int solve1(int, int)’: user.cpp:22:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[c].size(); ++i) ^ user.cpp: In function ‘int solve2(int, int)’: user.cpp:43:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(v[a].size() == 2) ^ user.cpp: In function ‘int bfs(int, int)’: user.cpp:65:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[c].size(); ++i) ^ user.cpp: In function ‘int bfs2(int, int)’: user.cpp:122:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[c].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:157:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri4.in", "r", stdin); ^ user.cpp:158:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri4.out", "w", stdout); ^ user.cpp:159:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:162:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &Tip); ^ user.cpp:164:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &a, &b); ^ user.cpp:166:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a); ^