oj.uz

Submission #996950

# Submission time Handle Problem Language Result Execution time Memory
996950 2024-06-11T13:58:26 Z yeediot Jobs (BOI24_jobs) C++17
11 / 100
 94 ms 35408 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define F first
#define S second
#define all(x) x.begin(),x.end()
#define pii pair<int,int>
#define pb push_back
#define sz(x) (int)(x.size())
#define chmin(x,y) x=min(x,y)
#define chmax(x,y) x=max(x,y)
#define vi vector<int>
#define vp vector<pii>
#define vvi vector<vi>
#define ykh mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count())
#define __lg(x) 63-__builtin_clzll(x)
#define pow2(x) (1LL<<x)
void __print(int x) {cerr << x;}
void __print(float x) {cerr << x;}
void __print(double x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << '\'' << x << '\'';}
void __print(const char *x) {cerr << '\"' << x << '\"';}
void __print(const string &x) {cerr << '\"' << x << '\"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ','; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? "," : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}
#ifdef local
void CHECK();
void setio(){
    freopen("/Users/iantsai/cpp/input.txt","r",stdin);
    freopen("/Users/iantsai/cpp/output.txt","w",stdout);
}
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
void setio(){}
#define debug(x...)
#endif
#define TOI_is_so_de ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);setio();
const int mxn = 3e5+5;
vector<int>adj[mxn];
int p[mxn], v[mxn], dp[mxn], dp2[mxn], cur;
bool vis[mxn];
void dfs(int now, int pa = 0){
    dp2[now] = cur;
    vis[now] = 1;
    //debug(now);
    int sum = 0, sum2 = 0;
    for(auto u : adj[now]){
        if(u == pa) continue;
        cur += v[u];
        dfs(u, now);
        cur -= v[u];
        if(dp[u] >= 0){
            sum += dp[u];
        } 
    }
    chmax(dp[now],sum+v[now]);
    //debug(now, dp[now]);
}
signed main(){
    TOI_is_so_de;
    int n, s;
    cin >> n >> s;
    for(int i=1;i<=n;i++){
        cin >> v[i] >> p[i];
        adj[p[i]].pb(i);
    }
    int ans = 0;
    for(int i=1;i<=n;i++){
        if(p[i]==0){
            cur += v[i];
            dfs(i);
            cur -= v[i];
            ans += dp[i];
        }
    }
    cout << ans << '\n';
    #ifdef local
    CHECK();
    #endif
}
/*
input:
 
*/
#ifdef local
void CHECK(){
    cerr << "\n[Time]: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
     function<bool(string,string)> compareFiles = [](string p1, string p2)->bool {
         std::ifstream file1(p1);
         std::ifstream file2(p2);
         if (!file1.is_open() || !file2.is_open())return false;
         std::string line1, line2;
         while (getline(file1, line1) && getline(file2, line2)) {
             if (line1 != line2)return false;
         }
         int cnta=0,cntb=0;
         while(getline(file1,line1))cnta++;
         while(getline(file2,line2))cntb++;
         return cntb-cnta<=1;
     };
     bool check = compareFiles("output.txt","expected.txt");
     if (check) cerr<<"ACCEPTED\n";
     else cerr<<"WRONG ANSWER!\n";
}
#else
#endif

Compilation message

Main.cpp: In function 'void dfs(long long int, long long int)':
Main.cpp:58:18: warning: unused variable 'sum2' [-Wunused-variable]
   58 |     int sum = 0, sum2 = 0;
      |                  ^~~~
Main.cpp: In function 'void setIO(std::string)':
Main.cpp:35:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:36:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 25344 KB Output is correct
2 Correct 71 ms 24532 KB Output is correct
3 Correct 90 ms 23796 KB Output is correct
4 Correct 63 ms 31572 KB Output is correct
5 Correct 69 ms 35016 KB Output is correct
6 Correct 44 ms 21584 KB Output is correct
7 Correct 90 ms 24404 KB Output is correct
8 Correct 81 ms 23872 KB Output is correct
9 Correct 65 ms 33876 KB Output is correct
10 Correct 55 ms 35408 KB Output is correct
11 Correct 94 ms 24656 KB Output is correct
12 Correct 71 ms 22864 KB Output is correct
13 Correct 73 ms 24532 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 14940 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 14940 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 29.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 14940 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 66 ms 25344 KB Output is correct
2 Correct 71 ms 24532 KB Output is correct
3 Correct 90 ms 23796 KB Output is correct
4 Correct 63 ms 31572 KB Output is correct
5 Correct 69 ms 35016 KB Output is correct
6 Correct 44 ms 21584 KB Output is correct
7 Correct 90 ms 24404 KB Output is correct
8 Correct 81 ms 23872 KB Output is correct
9 Correct 65 ms 33876 KB Output is correct
10 Correct 55 ms 35408 KB Output is correct
11 Correct 94 ms 24656 KB Output is correct
12 Correct 71 ms 22864 KB Output is correct
13 Correct 73 ms 24532 KB Output is correct
14 Incorrect 2 ms 14940 KB Output isn't correct
15 Halted 0 ms 0 KB -