Compilare: user.cpp: In function ‘int dfs(int, int, std::vector<int>&, std::vector<std::vector<int> >&)’: user.cpp:11:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ad[poz].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:63:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (j < c - 1) ^ user.cpp:72:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (i < r - 1) ^ user.cpp:20:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("verlab.in", "r", stdin); ^ user.cpp:21:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("verlab.out", "w", stdout); ^ user.cpp:23:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:26:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &r, &c); ^ user.cpp:33:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &mat[i][j]); ^