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답안 #292898

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
292898 2020-09-07T14:40:05 Z 문홍윤(#5817) 급행열차 20/19 (ROI19_express) C++17
24 / 100
 662 ms 63196 KB 
#include <bits/stdc++.h>
#define mp make_pair
#define eb emplace_back
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define svec(x) sort(all(x))
#define press(x) x.erase(unique(all(x)), x.end());
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
typedef pair<int, LL> pil;
typedef pair<LL, int> pli;
typedef pair<LL, LL> pll;
const int INF=1e9;
const LL LLINF=1e11;

int n, m, q, indeg[500010];
int topo[500010], re, fr;
LL p;

vector<pil> link[500010], rlink[500010];
vector<LL> dp[500010];
char str[500010];

void cl(int num, int qu){
    re=fr=0;
    for(int i=1; i<=num; i++){
        vector<pil>().swap(link[i]);
        vector<pil>().swap(rlink[i]);
        vector<LL>().swap(dp[i]);
    }
    for(int i=1; i<=qu; i++)str[i]=0;
}

void merge_dp(int num){
    int sz=rlink[num].size();
    LL st=0;
    vector<int> pv(sz);
    vector<LL> tmp;
    while(1){
        LL minn=LLINF;
        int minnum=-1;
        for(int i=0; i<pv.size(); i++){
            int nw=rlink[num][i].F;
            LL c=rlink[num][i].S;
            if(pv[i]==dp[nw].size())continue;
            if(minn>dp[nw][pv[i]]+c){
                minn=dp[nw][pv[i]]+c;
                minnum=i;
            }
        }
        if(minnum==-1)break;
        if(st*p/(p-1)<minn){
            tmp.eb(minn);
            tmp.eb(minn);
            st=minn;
        }
        else tmp[tmp.size()-1]=minn;
        pv[minnum]++;
    }
    press(tmp);
    dp[num].resize(tmp.size());
    for(int i=0; i<tmp.size(); i++)dp[num][i]=tmp[i];
}

void solve(){
    scanf("%d %d %d %lld", &n, &m, &q, &p);
    for(int i=1; i<=m; i++){
        int a, b; LL c;
        scanf("%d %d %lld", &a, &b, &c);
        link[a].eb(b, c);
        rlink[b].eb(a, c);
        indeg[b]++;
    }
    for(int i=1; i<=n; i++){
        if(!indeg[i])topo[++re]=i;
    }
    for(fr=1; fr<=re; fr++){
        for(auto i:link[topo[fr]]){
            indeg[i.F]--;
            if(!indeg[i.F])topo[++re]=i.F;
        }
    }
    dp[1].eb(0);
    for(int i=2; i<=n; i++)merge_dp(topo[i]);
    for(int i=1; i<=q; i++){
        int a; LL s, e;
        scanf("%d %lld", &a, &s);
        e=s*p/(p-1);
        int num=upper_bound(all(dp[a]), e)-lower_bound(all(dp[a]), s);
        if(num)str[i]='1';
        else str[i]='0';
    }
    printf("%s\n", str+1);
    cl(n, q);
}

int main(){
    int t;
    scanf("%d", &t);
    while(t--)solve();
}

Compilation message

express.cpp: In function 'void merge_dp(int)':
express.cpp:44:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |         for(int i=0; i<pv.size(); i++){
      |                      ~^~~~~~~~~~
express.cpp:47:21: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |             if(pv[i]==dp[nw].size())continue;
express.cpp:64:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |     for(int i=0; i<tmp.size(); i++)dp[num][i]=tmp[i];
      |                  ~^~~~~~~~~~~
express.cpp: In function 'void solve()':
express.cpp:68:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   68 |     scanf("%d %d %d %lld", &n, &m, &q, &p);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
express.cpp:71:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   71 |         scanf("%d %d %lld", &a, &b, &c);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
express.cpp:89:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   89 |         scanf("%d %lld", &a, &s);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~
express.cpp: In function 'int main()':
express.cpp:101:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  101 |     scanf("%d", &t);
      |     ~~~~~^~~~~~~~~~

Subtask #1
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 35584 KB Output is correct
2 Correct 22 ms 35584 KB Output is correct
3 Correct 22 ms 35584 KB Output is correct
4 Correct 22 ms 35584 KB Output is correct
5 Incorrect 29 ms 35584 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 35584 KB Output is correct
2 Correct 22 ms 35624 KB Output is correct
3 Correct 23 ms 35584 KB Output is correct
4 Correct 24 ms 35584 KB Output is correct
5 Correct 23 ms 35584 KB Output is correct
6 Correct 23 ms 35584 KB Output is correct
7 Correct 23 ms 35584 KB Output is correct
8 Correct 23 ms 35584 KB Output is correct
9 Correct 22 ms 35584 KB Output is correct
10 Correct 28 ms 35712 KB Output is correct
11 Correct 40 ms 36096 KB Output is correct
12 Correct 28 ms 35960 KB Output is correct
13 Correct 32 ms 36092 KB Output is correct
14 Correct 27 ms 35584 KB Output is correct
15 Correct 26 ms 35576 KB Output is correct
16 Correct 27 ms 35584 KB Output is correct
17 Correct 29 ms 35576 KB Output is correct
18 Correct 26 ms 35584 KB Output is correct
19 Correct 27 ms 35584 KB Output is correct
20 Correct 27 ms 35584 KB Output is correct
21 Correct 31 ms 35652 KB Output is correct
22 Correct 27 ms 35964 KB Output is correct
23 Correct 28 ms 35960 KB Output is correct
24 Correct 29 ms 35584 KB Output is correct
25 Correct 28 ms 35584 KB Output is correct
26 Correct 29 ms 35576 KB Output is correct
27 Correct 27 ms 35576 KB Output is correct
28 Correct 25 ms 35584 KB Output is correct
29 Correct 25 ms 35584 KB Output is correct
30 Correct 25 ms 35584 KB Output is correct
31 Correct 25 ms 35580 KB Output is correct
32 Correct 416 ms 37112 KB Output is correct

Subtask #3
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 35576 KB Output is correct
2 Correct 662 ms 63196 KB Output is correct
3 Incorrect 475 ms 41212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 35576 KB Output is correct
2 Correct 662 ms 63196 KB Output is correct
3 Incorrect 475 ms 41212 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 35584 KB Output is correct
2 Correct 23 ms 35584 KB Output is correct
3 Correct 24 ms 35584 KB Output is correct
4 Correct 24 ms 35584 KB Output is correct
5 Correct 24 ms 35584 KB Output is correct
6 Correct 23 ms 35584 KB Output is correct
7 Correct 24 ms 35576 KB Output is correct
8 Correct 28 ms 36608 KB Output is correct
9 Correct 25 ms 35584 KB Output is correct
10 Incorrect 24 ms 35584 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 35584 KB Output is correct
2 Correct 23 ms 35584 KB Output is correct
3 Correct 24 ms 35584 KB Output is correct
4 Correct 24 ms 35584 KB Output is correct
5 Correct 24 ms 35584 KB Output is correct
6 Correct 23 ms 35584 KB Output is correct
7 Correct 24 ms 35576 KB Output is correct
8 Correct 28 ms 36608 KB Output is correct
9 Correct 25 ms 35584 KB Output is correct
10 Incorrect 24 ms 35584 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #7
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 35584 KB Output is correct
2 Correct 22 ms 35584 KB Output is correct
3 Correct 22 ms 35584 KB Output is correct
4 Correct 22 ms 35584 KB Output is correct
5 Incorrect 29 ms 35584 KB Output isn't correct
6 Halted 0 ms 0 KB -