Compilare: main.cpp: In function 'int main()': main.cpp:95:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < edges[node].size(); j++){ ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:82:20: warning: unused variable 'nrNodes' [-Wunused-variable] int Min, node, nrNodes = 0; ^~~~~~~ main.cpp: In function 'void Read(int&)': main.cpp:29:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^ main.cpp:34:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^ main.cpp: In function 'int main()': main.cpp:76:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in", "w", stdout); ^