Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:25:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[n].size(); ++i) ^ user.cpp:30:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[n].size(); ++i) ^ user.cpp:40:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[n].size(); ++i) ^ user.cpp:42:35: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(ver[v[n][i]] == 1 && ramase[v[n][i]] < val[v[n][i]] || val[v[n][i]] == 0) ^ user.cpp:47:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < v[v[n][i]].size(); ++j) ^ user.cpp: In function ‘int main()’: user.cpp:62:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("markon.in", "r", stdin); ^ user.cpp:63:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("markon.out", "w", stdout); ^ user.cpp:66:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &m, &st); ^ user.cpp:69:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &val[i]); ^ user.cpp:74:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^