Compilare: main.cpp: In function 'void citire()': main.cpp:15:12: warning: unused variable 'j' [-Wunused-variable] int i, j; ^ main.cpp: In function 'void DFS(int)': main.cpp:36:13: warning: unused variable 'i' [-Wunused-variable] int i; ^ main.cpp: In function 'int main()': main.cpp:54:13: warning: unused variable 'k1' [-Wunused-variable] int k1 , k2; ^~ main.cpp:54:18: warning: unused variable 'k2' [-Wunused-variable] int k1 , k2; ^~ main.cpp: In function 'void citire()': main.cpp:10:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cerere.in", "r", stdin); ^ main.cpp:11:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("cerere.out", "w", stdout); ^ main.cpp:13:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:18:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^ main.cpp:25:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^