Compilare: user.cpp: In function ‘bool bellman(int, long long int)’: user.cpp:18:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j, fiu, nod; ^ user.cpp:18:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, fiu, nod; ^ user.cpp: In function ‘int main()’: user.cpp:59:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, x, y, c, s; ^ user.cpp:59:30: warning: unused variable ‘s’ [-Wunused-variable] int n, m, i, j, x, y, c, s; ^ user.cpp:56:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ciclu.in","r",stdin); ^ user.cpp:57:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ciclu.out","w",stdout); ^ user.cpp:64:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:66:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&c); ^ user.cpp:85:17: warning: ‘cost’ may be used uninitialized in this function [-Wmaybe-uninitialized] cost /= 1000; ^