Compilare: user.cpp: In function ‘int main()’: user.cpp:4:78: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] using namespace std;char v[100000];int main(){freopen("furnici.in","r",stdin);freopen("furnici.out","w",stdout);int n,l,maxi=0;scanf("%d %d",&l,&n);for(int i=1;i<=n;i++){char c;int nr;scanf("%d %c",&nr,&c);if(c=='D'){maxi=max(l-nr,maxi);continue ;}maxi=max(nr,maxi);}printf("%d",maxi);return 0;} ^ user.cpp:4:112: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] using namespace std;char v[100000];int main(){freopen("furnici.in","r",stdin);freopen("furnici.out","w",stdout);int n,l,maxi=0;scanf("%d %d",&l,&n);for(int i=1;i<=n;i++){char c;int nr;scanf("%d %c",&nr,&c);if(c=='D'){maxi=max(l-nr,maxi);continue ;}maxi=max(nr,maxi);}printf("%d",maxi);return 0;} ^ user.cpp:4:148: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] using namespace std;char v[100000];int main(){freopen("furnici.in","r",stdin);freopen("furnici.out","w",stdout);int n,l,maxi=0;scanf("%d %d",&l,&n);for(int i=1;i<=n;i++){char c;int nr;scanf("%d %c",&nr,&c);if(c=='D'){maxi=max(l-nr,maxi);continue ;}maxi=max(nr,maxi);}printf("%d",maxi);return 0;} ^ user.cpp:4:206: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] using namespace std;char v[100000];int main(){freopen("furnici.in","r",stdin);freopen("furnici.out","w",stdout);int n,l,maxi=0;scanf("%d %d",&l,&n);for(int i=1;i<=n;i++){char c;int nr;scanf("%d %c",&nr,&c);if(c=='D'){maxi=max(l-nr,maxi);continue ;}maxi=max(nr,maxi);}printf("%d",maxi);return 0;} ^