Compilare: user.cpp: In function ‘int main()’: user.cpp:86:51: warning: unknown conversion type character 0x20 in format [-Wformat=] scanf("%d% d% d", &v[i].x, &v[i].y, &v[i].cost); ^ user.cpp:86:51: warning: unknown conversion type character 0x20 in format [-Wformat=] user.cpp:86:51: warning: too many arguments for format [-Wformat-extra-args] 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("apm2.in","rt",stdin); freopen("apm2.out","wt",stdout); ^ user.cpp:81:67: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm2.in","rt",stdin); freopen("apm2.out","wt",stdout); ^ user.cpp:83:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&q); ^ user.cpp:86:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d% d% d", &v[i].x, &v[i].y, &v[i].cost); ^ user.cpp:92:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^