Submission #31651

#	Time	Username	Problem	Language	Result	Execution time	Memory
31651		long10024070	Relativnost (COCI15_relativnost)	C++11	0 / 140	0 ms	1840 KiB

relativnost

#include <iostream>
#include <cstdio>

using namespace std;
const string TASK = "Relativnost";

const int Mod = 1e4 + 7;
const int maxn = 1e6 + 1;
struct T_node
{
    int l,r,f[21];
};
int n,c,a[maxn],b[maxn],id[maxn];
T_node node[maxn*20];

void Enter()
{
    //cin >> n >> c;
    scanf("%d%d",&n,&c);
    for (int i=1;i<=n;++i)
        //cin >> a[i];
        scanf("%d",&a[i]);
    for (int i=1;i<=n;++i)
        //cin >> b[i];
        scanf("%d",&b[i]);
}

void Build_tree(int i, int l, int r)
{
    node[i].l = l;
    node[i].r = r;
    fill(node[i].f,node[i].f+c+1,1);
    if (l == r)
        id[l] = i;
    else {
        Build_tree(i*2,l,(l+r)/2);
        Build_tree(i*2+1,(l+r)/2+1,r);
    }
}

void Update(int i)
{
    if (i == 0)
        return;
    fill(node[i].f,node[i].f+c+1,0);
    if (node[i].l == node[i].r) {
        node[i].f[1] = a[node[i].l] % Mod;
        node[i].f[0] = b[node[i].l] % Mod;
    }
    else
        for (int j=0;j<=c;++j)
            for (int k=0;k<=c;++k)
                node[i].f[min(c,j+k)] = (node[i].f[min(c,j+k)] + node[i*2].f[j] * node[i*2+1].f[k]) % Mod;
    Update(i/2);
}

void Init()
{
    Build_tree(1,1,n);
    for (int i=1;i<=n;++i)
        Update(id[i]);
}

void Solve()
{
    int q,p,A,B;
    for (cin>>q;q>0;--q) {
        //cin >> p >> A >> B;
        scanf("%d%d%d",&p,&A,&B);
        a[p] = A;
        b[p] = B;
        Update(id[p]);
        //cout << node[1].f[c] << '\n';
        printf("%d\n",node[1].f[c]);
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    //freopen((TASK+".INP").c_str(),"r",stdin);
    //freopen((TASK+".OUT").c_str(),"w",stdout);

    Enter();
    Init();
    Solve();
}

Compilation message (stderr)

relativnost.cpp: In function 'void Enter()':
relativnost.cpp:19:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&c);
                        ^
relativnost.cpp:22:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a[i]);
                          ^
relativnost.cpp:25:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&b[i]);
                          ^
relativnost.cpp: In function 'void Solve()':
relativnost.cpp:69:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d",&p,&A,&B);
                                 ^

• Subtask 1: 0 / 140