Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:38:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < V[x].size(); ++ i) ^ user.cpp: In function ‘void solve()’: user.cpp:64:27: warning: narrowing conversion of ‘x’ from ‘double’ to ‘int’ inside { } [-Wnarrowing] P[++ nrp] = {x, y}; ^ user.cpp:64:27: warning: narrowing conversion of ‘y’ from ‘double’ to ‘int’ inside { } [-Wnarrowing] user.cpp:75:27: warning: narrowing conversion of ‘x’ from ‘double’ to ‘int’ inside { } [-Wnarrowing] P[++ nrp] = {x, y}; ^ user.cpp:75:27: warning: narrowing conversion of ‘y’ from ‘double’ to ‘int’ inside { } [-Wnarrowing] user.cpp:78:27: warning: narrowing conversion of ‘x’ from ‘double’ to ‘int’ inside { } [-Wnarrowing] P[++ nrp] = {x, y}; ^ user.cpp:78:27: warning: narrowing conversion of ‘y’ from ‘double’ to ‘int’ inside { } [-Wnarrowing] user.cpp:71:30: warning: unused variable ‘c1’ [-Wunused-variable] double x, y, c1 = v[i].x - v[j].x, c2 = v[i].y - v[j].y, dc; ^ user.cpp: In function ‘void read()’: user.cpp:29:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:31:53: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &v[i].x, &v[i].y, &v[i].r); ^