Compilare: main.cpp: In function 'void dfs(int)': main.cpp:73:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0 ; j < G[u].size() ; j ++) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:126:24: warning: unused variable 'l' [-Wunused-variable] int p, n, m, i, j, l, nrm , tx , ty , nr; ^ main.cpp:124:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("elicoptere.in", "r", stdin); ^ main.cpp:125:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("elicoptere.out", "w", stdout); ^ main.cpp:128:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%lf", &p, &n, &k); ^ main.cpp:132:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &tx, &ty); ^