oj.uz

답안 #671053

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
671053 2022-12-11T17:58:32 Z gavgav Fountain (eJOI20_fountain) C++17
100 / 100
 116 ms 9208 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define vec vector
#define puB push_back
#define poB pop_back
#define qu queue

struct point{
    int energy, id; // id for at end print answers in right order
    bool operator < (point b){ // for sort
        return this->energy <= b.energy;
    }
};
int main(){
    // input
    int nodesNumber, pointsNumber;
    scanf("%d%d", &nodesNumber, &pointsNumber);
    int weightsSum[nodesNumber + 1] {0};
    int radii[nodesNumber + 1] {1000000001};
    for (int i = 1; i <= nodesNumber; ++i)
        scanf("%d%d", &(radii[i]), &(weightsSum[i]));

    // create tree
    int output[pointsNumber];
    int path[nodesNumber + 1] {0};
    int top = 0;
    vec <vec <point> > points (nodesNumber + 1);
    for (int i = 0; i < pointsNumber; ++i){
        int position, energy;
        scanf("%d%d", &position, &energy);
        points[position].puB(point {energy, i});
    }
    for (int i = 1; i <= nodesNumber; ++i){
        sort(points[i].begin(), points[i].end());
    }
    for (int i = nodesNumber; i > 0; --i){
        while (radii[path[top]] <= radii[i]){
            --top;
        }
        ++top;
        path[top] = i;
        weightsSum[path[top]] += weightsSum[path[top - 1]];
        int left, middle, right = top, answer;
        for (int j = 0; j < points[i].size(); ++j){
            left = 0;
            while (left <= right){
                middle = (left + right) / 2;
                if (weightsSum[path[top]] - weightsSum[path[middle]] < points[i][j].energy){
                    right = middle - 1;
                    answer = middle;
                }
                else{
                    left = middle + 1;
                }
            }
            output[points[i][j].id] = path[answer];
        }
    }
    for (int i = 0; i < pointsNumber; ++i)
        printf("%d\n", output[i]);
}

Compilation message

fountain.cpp: In function 'int main()':
fountain.cpp:45:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |         for (int j = 0; j < points[i].size(); ++j){
      |                         ~~^~~~~~~~~~~~~~~~~~
fountain.cpp:18:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     scanf("%d%d", &nodesNumber, &pointsNumber);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fountain.cpp:22:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         scanf("%d%d", &(radii[i]), &(weightsSum[i]));
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fountain.cpp:31:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         scanf("%d%d", &position, &energy);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
fountain.cpp:57:50: warning: 'answer' may be used uninitialized in this function [-Wmaybe-uninitialized]
   57 |             output[points[i][j].id] = path[answer];
      |                                       ~~~~~~~~~~~^

Subtask #1
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 79 ms 6672 KB Output is correct
2 Correct 87 ms 6864 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 79 ms 6672 KB Output is correct
9 Correct 87 ms 6864 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 54 ms 4736 KB Output is correct
12 Correct 116 ms 8616 KB Output is correct
13 Correct 110 ms 9160 KB Output is correct
14 Correct 91 ms 9160 KB Output is correct
15 Correct 91 ms 9208 KB Output is correct