Compilare: user.cpp: In function ‘int main()’: user.cpp:209:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < vecini[0].size(); i++) { ^ user.cpp:219:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < vecini[min].size(); i++) { ^ user.cpp:184:36: 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); ^ user.cpp:185:38: 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); ^ user.cpp:188:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i", &n, &m); ^ user.cpp:192:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%i%i%i", &a, &b, &c); ^