Compilare: main.cpp: In function 'int main()': main.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < G[nod].size(); ++i) { ~~^~~~~~~~~~~~~~~ main.cpp:31:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(d[vecin] > d[nod] + 1) ^~ main.cpp:33:17: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' if(v[vecin] == 0) { ^~ main.cpp:12:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bfs.in", "r", stdin); ^ main.cpp:13:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bfs.out", "w", stdout); ^ main.cpp:14:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &S); ^ main.cpp:16:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^