oj.uz

Submission #494882

# Submission time Handle Problem Language Result Execution time Memory
494882 2021-12-17T07:48:15 Z BreakOfDawn Fireworks (APIO16_fireworks) C++14
19 / 100
 25 ms 5792 KB 
#include <bits/stdc++.h>
using namespace std;

#define LL long long
#define F first
#define S second
#define pii pair<int,int>
#define piii pair<pair<int,int>,int>
#define task "DUT03PHOA"

const int N = 2e5+10;
const int M = 2e3+10;
const LL INF = 1e9;
const LL LINF = 1e14;
const LL MOD = 1e9+7;
const double PI = 3.141592653589793;

vector<pair<int,LL>>adj[N];
LL dp[N][350];
void fastio()
{

    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
}
void inti()
{
        if(fopen(task".inp","r"))
    {
        freopen(task".inp","r",stdin);
        freopen(task".out","w",stdout);
    }
}
void dfs(int i){

    if(adj[i].empty()){
        for(int j=1;j<=300;j++)
            dp[i][j] = LINF;
    }

    for(auto x:adj[i]){

        dfs(x.F);

        for(int j=0;j<=300;j++){

            LL mn = LINF;
            for(int k=0;k<=j;k++)
                mn = min(mn,dp[x.F][k]+abs(x.S-(abs(k-j))));

            dp[i][j] += mn;
        }
    }
}

int main(){

    //freopen("out.txt","w",stdout);
    inti();
    int n,m;
    scanf("%d%d",&n,&m);
        for(int i=2;i<=n+m;i++){
        LL v,w;
        scanf("%lld%lld",&v,&w);
        adj[v].push_back({i,w});
        }

    dfs(1);

    LL ans = LINF;
    for(int i=0;i<=300;i++)
        ans = min(ans,dp[1][i]);

    printf("%lld",ans);
    }

//

Compilation message

fireworks.cpp: In function 'void inti()':
fireworks.cpp:31:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         freopen(task".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
fireworks.cpp:32:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |         freopen(task".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
fireworks.cpp: In function 'int main()':
fireworks.cpp:62:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |     scanf("%d%d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~
fireworks.cpp:65:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         scanf("%lld%lld",&v,&w);
      |         ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4940 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 5 ms 4996 KB Output is correct
3 Correct 7 ms 5068 KB Output is correct
4 Correct 10 ms 5264 KB Output is correct
5 Correct 11 ms 5304 KB Output is correct
6 Correct 12 ms 5372 KB Output is correct
7 Correct 20 ms 5444 KB Output is correct
8 Correct 17 ms 5452 KB Output is correct
9 Correct 17 ms 5452 KB Output is correct
10 Correct 18 ms 5580 KB Output is correct
11 Correct 21 ms 5624 KB Output is correct
12 Correct 22 ms 5704 KB Output is correct
13 Correct 23 ms 5672 KB Output is correct
14 Correct 23 ms 5788 KB Output is correct
15 Correct 24 ms 5708 KB Output is correct
16 Correct 25 ms 5788 KB Output is correct
17 Correct 25 ms 5728 KB Output is correct
18 Correct 24 ms 5792 KB Output is correct
19 Correct 24 ms 5784 KB Output is correct

Subtask #3
0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4940 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 45.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 4940 KB Output isn't correct
2 Halted 0 ms 0 KB -