Compilare: user.cpp: In function ‘int main()’: user.cpp:34:9: warning: unused variable ‘j’ [-Wunused-variable] int i, j, k, x, y, c, cmin; ^ user.cpp:34:12: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k, x, y, c, cmin; ^ user.cpp:34:24: warning: variable ‘cmin’ set but not used [-Wunused-but-set-variable] int i, j, k, x, y, c, cmin; ^ user.cpp: In function ‘void dijkstra(int)’: user.cpp:79:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < v[x].size(); ++i) { ^ user.cpp:106:18: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (a == start && Prev[b] == b || b == start && Prev[a] == a) ^ user.cpp: In function ‘int main()’: user.cpp:36:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:38:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &c); ^