Compilare: main.cpp: In function 'int main()': main.cpp:45:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (x = 2; x < minim.size(); x++) ~~^~~~~~~~~~~~~~ main.cpp:29:39: 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:30:41: 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); ^