Compilare: user.cpp: In function ‘int main()’: user.cpp:39:39: warning: integer overflow in expression [-Woverflow] int n, k, l, ind, len = (1 << 31) - 1, ind1, x, h; ~~~~~~~~~~^~~ user.cpp:71:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind != q.size()) ~~~~^~~~~~~~~~~ user.cpp:88:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < leg[q[ind].ind].size(); i++) q.push_back({leg[q[ind].ind][i], q[ind].cab + 1, ind, q[ind].len + sqrt((v[q[ind].ind].getx() - v[leg[q[ind].ind][i]].getx()) * (v[q[ind].ind].getx() - v[leg[q[ind].ind][i]].getx()) + (v[q[ind].ind].geth() - v[leg[q[ind].ind][i]].geth()) * (v[q[ind].ind].geth() - v[leg[q[ind].ind][i]].geth()))}); ~~^~~~~~~~~~~~~~~~~~~~~~~~ user.cpp:36:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("munte2.in", "r", stdin); ^ user.cpp:37:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("munte2.out", "w", stdout); ^ user.cpp:42:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &k, &l); ^ user.cpp:45:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &h); ^