Compilare: main.cpp: In function 'void dij(int)': main.cpp:30:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graph[nod].size();i++) ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:48:15: warning: unused variable 'j' [-Wunused-variable] int m, i, j, cost, a, b, q; ^ main.cpp:46:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("catun.in", "r", stdin); ^ main.cpp:47:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("catun.out", "w", stdout); ^ main.cpp:50:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &q); ^ main.cpp:54:25: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nr); ^ main.cpp:61:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &a, &b, &cost); ^