Compilare: user.cpp: In function ‘int main()’: user.cpp:100:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < SCC[i].size(); j++){ ^ user.cpp:106:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < G[i].Adj.size(); j++){ ^ user.cpp:137:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < ST.size() - 2; i+=2){ ^ user.cpp:143:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 1; i < DR.size() - 2; i+=2){ ^ user.cpp: In function ‘void citire()’: user.cpp:25:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ user.cpp:28:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &x, &y); ^ user.cpp: In function ‘int main()’: user.cpp:80:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plan.in", "r", stdin ); ^ user.cpp:81:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plan.out", "w", stdout); ^