Compilare: main.cpp:1:2: warning: #import is a deprecated GCC extension [-Wdeprecated] #import<fstream> ^~~~~~ main.cpp:2:94: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] using namespace std;ifstream r("divk.in");ofstream w("divk.out");int v[500001],f[99999];main(){int n,a,b,k;long long cnt=0;r>>n>>k>>a>>b;for(int i=1;i<=n;i++){int x;r>>x;v[i]=(v[i-1]+x)%k;if(i>=a)f[v[i-a]]++;if(i>b)f[v[i-b-1]]--;cnt+=f[v[i]];}w<<cnt;} ^