Compilare: user.cpp: In function ‘void dijkstra(int)’: user.cpp:68:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < graf[acum].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:86:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &N, &M); ^ user.cpp:88:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d %d", &u, &v, &cost); ^ user.cpp:99:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.out", "w", stdout); ^