oj.uz

Submission #909172

# Submission time Handle Problem Language Result Execution time Memory
909172 2024-01-17T05:56:11 Z ibm2006 Dynamic Diameter (CEOI19_diameter) C++17
18 / 100
 5000 ms 59216 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
ll n,i,j,k,l,r,x,y,z,w,s,t,h[1100000],ans,qu,len[1100000],dia[1100000],dep[1100000],par[1100000];
vector<pair<ll,ll>> v[1100000];
pair<ll,ll> pq;
multiset<ll> st;
pair<ll,pair<ll,ll>> p[1100000],q[1100000];
ll f(ll x,ll y)
{
    dep[x]=dep[y]+1;
    par[x]=y;
    ll i,s=0,z,t=0;
    for(i=0;i<h[x];i++)
    {
        if(v[x][i].first==y)
            continue;
        z=f(v[x][i].first,x)+v[x][i].second;
        s+=z;
        t=max(t,z);
    }
    dia[x]=s;
    st.insert(-dia[x]);
    len[x]=t;
    return t;
}
void g(ll x,ll y)
{
    if(x==0)
        return;
    ll i,s=0,z,t=0;
    for(i=0;i<h[x];i++)
    {
        if(v[x][i].first==y)
            continue;
        z=len[v[x][i].first]+v[x][i].second;
        s+=z;
        t=max(t,z);
    }
    st.erase(st.find(-dia[x]));
    dia[x]=s;
    st.insert(-dia[x]);
    len[x]=t;
    g(par[x],par[y]);
    return;
}
int main()
{
    scanf("%lld %lld %lld",&n,&qu,&w);
    for(i=1;i<n;i++)
    {
        scanf("%lld %lld %lld",&x,&y,&z);
        p[i]={x,{h[x],z}};
        q[i]={y,{h[y],z}};
        v[x].push_back({y,z});
        v[y].push_back({x,z});
        h[x]++;
        h[y]++;
    }
    f(1,0);
    for(i=1;i<=qu;i++)
    {
        scanf("%lld %lld",&x,&y);
        x=(x+ans)%(n-1);
        y=(y+ans)%w;
        x++;
        v[p[x].first][p[x].second.first].second=y;
        p[x].second.second=y;
         v[q[x].first][q[x].second.first].second=y;
        q[x].second.second=y;
        y=p[x].first;
        x=q[x].first;
        if(dep[x]<dep[y])
            swap(x,y);
        g(x,y);
        ans=(*st.begin());
        ans*=-1;
        printf("%lld\n",ans);
    }
}

Compilation message

diameter.cpp: In function 'int main()':
diameter.cpp:49:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |     scanf("%lld %lld %lld",&n,&qu,&w);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
diameter.cpp:52:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         scanf("%lld %lld %lld",&x,&y,&z);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
diameter.cpp:63:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |         scanf("%lld %lld",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 11.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 35164 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 35164 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 35164 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 35472 KB Output is correct
2 Correct 18 ms 35504 KB Output is correct
3 Correct 56 ms 35600 KB Output is correct
4 Correct 100 ms 35924 KB Output is correct
5 Correct 16 ms 38492 KB Output is correct
6 Correct 29 ms 38688 KB Output is correct
7 Correct 85 ms 38856 KB Output is correct
8 Correct 169 ms 40348 KB Output is correct
9 Correct 40 ms 47696 KB Output is correct
10 Correct 59 ms 47696 KB Output is correct
11 Correct 141 ms 48504 KB Output is correct
12 Correct 252 ms 49256 KB Output is correct
13 Correct 74 ms 57684 KB Output is correct
14 Correct 103 ms 58112 KB Output is correct
15 Correct 210 ms 58656 KB Output is correct
16 Correct 313 ms 59216 KB Output is correct
17 Correct 708 ms 58944 KB Output is correct

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Execution timed out 5039 ms 56400 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 10 ms 35164 KB Output isn't correct
2 Halted 0 ms 0 KB -