Compilare: main.cpp: In function 'int main()': main.cpp:32:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 2; i < minim.size(); i++) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int read()': main.cpp:7:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp: In function 'int main()': main.cpp:12:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in", "r", stdin); ^ main.cpp:13:38: 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); ^