Compilare: main.cpp: In function 'void dijkstra(int)': main.cpp:35:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < fort.size() ; i++ ) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d%d", &n, &m, &k ) ; ^ main.cpp:59:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &elem ) ; ^ main.cpp:63:41: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d%d", &a, &b, &c ) ; ^