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Submission #637871

# Submission time Handle Problem Language Result Execution time Memory
637871 2022-09-03T13:11:17 Z kideso Fountain (eJOI20_fountain) C++17
60 / 100
 1500 ms 256756 KB 
#include <iostream>
#include <queue>
#include <algorithm>

using namespace std;

struct P1{
    int start, extra;
};

struct P{
    int volume, index;
};

vector<vector<P> > routes(1, vector<P> ());
int N, Q, v, d;

bool operator < (const P &a, int val){
    return a.volume < val;
}

int main(){
    cin >> N >> Q;
    vector<P1> x(N + 1, {0, 0});
    vector<int> diameters(N + 1, 0);

    cin >> diameters[1] >> v;

    x[1] = {1, 0};
    routes.push_back(vector<P>());
    routes[1].push_back({v, 1});

    for(int i = 2; i <= N; ++i){
        cin >> diameters[i] >> v;
        bool ok = false;

        for(int j = 1; j < routes.size(); ++j){
            auto [V, s] = routes[j].back();
            if(diameters[s] < diameters[i]){
                ok = true;
                if(x[i].start == 0)
                    x[i] = {j, V};

                V += v;
                routes[j].push_back({V, i});
            }
        }

        if(!ok){
            int p = routes.size();
            x[i] = {p, 0};
            routes.push_back(vector<P>(1, {v, i}));
        }
    }

    int from, volume;
    while(Q--){
        cin >> from >> volume;
        volume += x[from].extra;
        from = x[from].start;
        auto it = lower_bound(routes[from].begin(), routes[from].end(), volume);
        cout << (it == routes[from].end() ? 0 : it -> index) << '\n';
    }

    return 0;
}

Compilation message

fountain.cpp: In function 'int main()':
fountain.cpp:37:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<P> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |         for(int j = 1; j < routes.size(); ++j){
      |                        ~~^~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 4 ms 340 KB Output is correct
5 Correct 4 ms 312 KB Output is correct
6 Correct 6 ms 980 KB Output is correct
7 Correct 5 ms 340 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 301 ms 5808 KB Output is correct
2 Correct 325 ms 6092 KB Output is correct

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 4 ms 340 KB Output is correct
5 Correct 4 ms 312 KB Output is correct
6 Correct 6 ms 980 KB Output is correct
7 Correct 5 ms 340 KB Output is correct
8 Correct 301 ms 5808 KB Output is correct
9 Correct 325 ms 6092 KB Output is correct
10 Correct 5 ms 304 KB Output is correct
11 Execution timed out 1566 ms 256756 KB Time limit exceeded
12 Halted 0 ms 0 KB -