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답안 #390017

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
390017 2021-04-15T05:28:07 Z georgerapeanu Worst Reporter 4 (JOI21_worst_reporter4) C++11
79 / 100
 451 ms 524292 KB 
#include <bits/stdc++.h>

using namespace std;

struct slope_magic_t{
    map<int,long long> slope_change;

    slope_magic_t(){
        slope_change = map<int,long long>();
    }

    void merge(slope_magic_t &other){
        for(auto it:other.slope_change){
            slope_change[it.first] += it.second;
        }
    }

    void add_value(int value,int cost){
        slope_change[0] += cost;
        slope_change[value] -= cost;
        slope_change[value + 1] += cost;

        long long relative_height = 0;
        map<int,long long> :: iterator it,it2;
        it = slope_change.lower_bound(value);

        long long current_diff = slope_change[value];

        while(current_diff < 0){
            it2 = it;
            if(it2 == slope_change.begin()){
                break;
            }
            it2--;
            if(it2 == slope_change.begin() || current_diff + it2->second > 0){
                it2->second += current_diff;
                slope_change.erase(it);
                break;
            }
            relative_height = -current_diff - it2->second;
            slope_change.erase(it2);
            current_diff = -relative_height;
        }
    }

    int size(){
        return (int)slope_change.size();
    }

    void swap(slope_magic_t &other){
        slope_change.swap(other.slope_change);
    }
};

const int NMAX = 2e5;

int n;
slope_magic_t dp[NMAX + 5];
vector<int> graph[NMAX + 5];
vector<int> graph2[NMAX + 5];
int father[NMAX + 5];
int c[NMAX + 5];
int h[NMAX + 5];


bool viz[NMAX + 5];
void dfs(int nod){
    viz[nod] = true;
    for(auto it:graph[nod]){
        dfs(it);
        if(dp[it].size() > dp[nod].size()){
            dp[nod].swap(dp[it]);
        }
        dp[nod].merge(dp[it]);
    }
    dp[nod].add_value(h[nod],c[nod]);
}

int lvl[NMAX + 5];
int st[NMAX + 5];
int len;
vector<int> cycle;
bool on_cycle[NMAX + 5];

void predfs(int nod){
    st[++len] = nod;
    lvl[nod] = len;
    viz[nod] = true;
    for(auto it:graph2[nod]){
        if(viz[it] == false){
            predfs(it);
        }else{
            for(int i = lvl[it];i <= lvl[nod];i++){
                on_cycle[st[i]] = true;
                cycle.push_back(st[i]);
            }
        }
    }
    len--;

}

long long solve(int nod){
    cycle.clear();
    predfs(nod);

    slope_magic_t global;

    for(auto it:cycle){
         for(auto it2:graph[it]){
            if(on_cycle[it2] == false){
                dfs(it2);
                global.merge(dp[it2]);
            }
        }
    }

    for(auto it:cycle){
        global.slope_change[0] += c[it];
        global.slope_change[h[it]] -= c[it];
        global.slope_change[h[it] + 1] += c[it];
    }

    long long curr_cost = 0;
    long long ans = 2e18;

    for(auto it:global.slope_change){
        curr_cost += it.second;
        ans = min(ans,curr_cost);
    }

    return ans;
}

int main(){

    scanf("%d",&n);

    for(int i = 1;i <= n;i++){
        scanf("%d %d %d",&father[i],&h[i],&c[i]);
        if(father[i] == i ){
            continue;
        }
        graph[father[i]].push_back(i);
        graph2[i].push_back(father[i]);
    }


    long long ans = 0;

/*    for(int i = 1;i <= n;i++){
        if(viz[i] == false){
            long long tmp = solve(i);
            ans += tmp;
        }
    }*/
    dfs(1);
    printf("%lld\n",dp[1].slope_change[0]);

    return 0;
}

Compilation message

worst_reporter2.cpp: In function 'int main()':
worst_reporter2.cpp:149:15: warning: unused variable 'ans' [-Wunused-variable]
  149 |     long long ans = 0;
      |               ^~~
worst_reporter2.cpp:137:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  137 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
worst_reporter2.cpp:140:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  140 |         scanf("%d %d %d",&father[i],&h[i],&c[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 19040 KB Output is correct
2 Correct 14 ms 19020 KB Output is correct
3 Correct 14 ms 19020 KB Output is correct
4 Correct 16 ms 19096 KB Output is correct
5 Correct 21 ms 20644 KB Output is correct
6 Correct 20 ms 20172 KB Output is correct
7 Correct 24 ms 19916 KB Output is correct
8 Correct 21 ms 20652 KB Output is correct
9 Correct 20 ms 20104 KB Output is correct
10 Correct 19 ms 19888 KB Output is correct
11 Correct 18 ms 19756 KB Output is correct
12 Correct 19 ms 20128 KB Output is correct
13 Correct 18 ms 20172 KB Output is correct
14 Correct 19 ms 19932 KB Output is correct
15 Correct 18 ms 19900 KB Output is correct
16 Correct 22 ms 20992 KB Output is correct
17 Correct 20 ms 20396 KB Output is correct
18 Correct 21 ms 19736 KB Output is correct
19 Correct 19 ms 20300 KB Output is correct
20 Correct 18 ms 20148 KB Output is correct
21 Correct 17 ms 20064 KB Output is correct
22 Correct 19 ms 20388 KB Output is correct
23 Correct 18 ms 20044 KB Output is correct
24 Correct 19 ms 20292 KB Output is correct
25 Correct 18 ms 20172 KB Output is correct
26 Correct 19 ms 20504 KB Output is correct
27 Correct 19 ms 20300 KB Output is correct
28 Correct 20 ms 20392 KB Output is correct
29 Correct 19 ms 20384 KB Output is correct
30 Correct 19 ms 20380 KB Output is correct
31 Correct 19 ms 20260 KB Output is correct

Subtask #2
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 20676 KB Output is correct
2 Correct 451 ms 94148 KB Output is correct
3 Correct 370 ms 69444 KB Output is correct
4 Correct 443 ms 91180 KB Output is correct
5 Correct 372 ms 69372 KB Output is correct
6 Correct 269 ms 50320 KB Output is correct
7 Correct 249 ms 45892 KB Output is correct
8 Correct 227 ms 61764 KB Output is correct
9 Correct 213 ms 61728 KB Output is correct
10 Correct 155 ms 61808 KB Output is correct
11 Correct 219 ms 49280 KB Output is correct
12 Correct 209 ms 49244 KB Output is correct
13 Correct 427 ms 119104 KB Output is correct
14 Correct 316 ms 83316 KB Output is correct
15 Correct 160 ms 45812 KB Output is correct
16 Correct 398 ms 65212 KB Output is correct
17 Correct 202 ms 58344 KB Output is correct
18 Correct 160 ms 58236 KB Output is correct
19 Correct 378 ms 67768 KB Output is correct
20 Correct 174 ms 55652 KB Output is correct
21 Correct 395 ms 66292 KB Output is correct
22 Correct 199 ms 59156 KB Output is correct
23 Correct 329 ms 74560 KB Output is correct
24 Correct 361 ms 69572 KB Output is correct
25 Correct 262 ms 71552 KB Output is correct
26 Correct 249 ms 72992 KB Output is correct
27 Correct 279 ms 69804 KB Output is correct
28 Correct 282 ms 69764 KB Output is correct

Subtask #3
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 13 ms 19040 KB Output is correct
2 Correct 14 ms 19020 KB Output is correct
3 Correct 14 ms 19020 KB Output is correct
4 Correct 16 ms 19096 KB Output is correct
5 Correct 21 ms 20644 KB Output is correct
6 Correct 20 ms 20172 KB Output is correct
7 Correct 24 ms 19916 KB Output is correct
8 Correct 21 ms 20652 KB Output is correct
9 Correct 20 ms 20104 KB Output is correct
10 Correct 19 ms 19888 KB Output is correct
11 Correct 18 ms 19756 KB Output is correct
12 Correct 19 ms 20128 KB Output is correct
13 Correct 18 ms 20172 KB Output is correct
14 Correct 19 ms 19932 KB Output is correct
15 Correct 18 ms 19900 KB Output is correct
16 Correct 22 ms 20992 KB Output is correct
17 Correct 20 ms 20396 KB Output is correct
18 Correct 21 ms 19736 KB Output is correct
19 Correct 19 ms 20300 KB Output is correct
20 Correct 18 ms 20148 KB Output is correct
21 Correct 17 ms 20064 KB Output is correct
22 Correct 19 ms 20388 KB Output is correct
23 Correct 18 ms 20044 KB Output is correct
24 Correct 19 ms 20292 KB Output is correct
25 Correct 18 ms 20172 KB Output is correct
26 Correct 19 ms 20504 KB Output is correct
27 Correct 19 ms 20300 KB Output is correct
28 Correct 20 ms 20392 KB Output is correct
29 Correct 19 ms 20384 KB Output is correct
30 Correct 19 ms 20380 KB Output is correct
31 Correct 19 ms 20260 KB Output is correct
32 Correct 22 ms 20676 KB Output is correct
33 Correct 451 ms 94148 KB Output is correct
34 Correct 370 ms 69444 KB Output is correct
35 Correct 443 ms 91180 KB Output is correct
36 Correct 372 ms 69372 KB Output is correct
37 Correct 269 ms 50320 KB Output is correct
38 Correct 249 ms 45892 KB Output is correct
39 Correct 227 ms 61764 KB Output is correct
40 Correct 213 ms 61728 KB Output is correct
41 Correct 155 ms 61808 KB Output is correct
42 Correct 219 ms 49280 KB Output is correct
43 Correct 209 ms 49244 KB Output is correct
44 Correct 427 ms 119104 KB Output is correct
45 Correct 316 ms 83316 KB Output is correct
46 Correct 160 ms 45812 KB Output is correct
47 Correct 398 ms 65212 KB Output is correct
48 Correct 202 ms 58344 KB Output is correct
49 Correct 160 ms 58236 KB Output is correct
50 Correct 378 ms 67768 KB Output is correct
51 Correct 174 ms 55652 KB Output is correct
52 Correct 395 ms 66292 KB Output is correct
53 Correct 199 ms 59156 KB Output is correct
54 Correct 329 ms 74560 KB Output is correct
55 Correct 361 ms 69572 KB Output is correct
56 Correct 262 ms 71552 KB Output is correct
57 Correct 249 ms 72992 KB Output is correct
58 Correct 279 ms 69804 KB Output is correct
59 Correct 282 ms 69764 KB Output is correct
60 Runtime error 338 ms 524292 KB Execution killed with signal 9
61 Halted 0 ms 0 KB -