oj.uz

답안 #469091

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
469091 2021-08-30T16:36:44 Z gavgav Fountain (eJOI20_fountain) C++17
60 / 100
 940 ms 524292 KB 
#include <iostream>
#include <vector>
#include <stack>
using namespace std;
int main(){
//    freopen("input.txt", "r", stdin);
//    freopen("output.txt", "w", stdout);
    /*
     * Get dates about fountain.
     * Creating array in witch every number denotes index of the nearest number witch greater than this reservoir.
     * Indexes in this array means number of reservoir.
     */
    int copy_height;
    int streams_number = 0, queries;
    scanf("%d%d", &copy_height, &queries);
    const int height = copy_height;
    int diameters[height], next_grater[height], capacities[height + 1];
    capacities[height] = 0;
    vector <int> starts;
    stack <int> meowmeow;
    for (int i = 0; i < height; i++){
        scanf("%d%d", &diameters[i], &capacities[i]);
        if (!meowmeow.empty() && diameters[i] > diameters[meowmeow.top()]){
            do{
                next_grater[meowmeow.top()] = i;
                meowmeow.pop();
            }while (!meowmeow.empty() && diameters[i] > diameters[meowmeow.top()]);
        }
        else{
            streams_number++;
            starts.push_back(i);
        }
        meowmeow.push(i);
    }
    while (!meowmeow.empty()){
        next_grater[meowmeow.top()] = height;
        meowmeow.pop();
    }
    /*
     * Creating of any possible water path.
     */
    int affiliation[height], indexes[height];
    int lengths[streams_number] {};
    vector <int> streams[streams_number];
    for (int i = 0; i < streams_number; i++){
        for (int j = starts[i], k = 0; j != height; j = next_grater[j], k++) {
            streams[i].push_back(j);
            lengths[i]++;
            indexes[j] = k;
            affiliation[j] = i;
        }
        streams[i].push_back(height);
    }
    /*
     * Creating postfix sums array.
     */
    for (int i = height - 1; i > -1; i--){
        capacities[i] += capacities[next_grater[i]];
    }
    /*
     * Get queries and by binary search print answer.
     */

    int volume, level, left, right, middle, answer;
    while (queries--){
        scanf("%d%d", &level, &volume);
        level--;
        left = indexes[level] + 1, right = lengths[affiliation[level]], answer = streams[affiliation[level]][indexes[level]] + 1;
        while (left - right < 1){
            middle = (left + right) / 2;
            if (volume > capacities[level] - capacities[streams[affiliation[level]][middle]]){
                answer = streams[affiliation[level]][middle] + 1;
                left = middle + 1;
            } else {
                right = middle - 1;
            }
        }
        printf("%d\n", answer % (height + 1));
    }
}

Compilation message

fountain.cpp: In function 'int main()':
fountain.cpp:15:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     scanf("%d%d", &copy_height, &queries);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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", &diameters[i], &capacities[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fountain.cpp:66:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |         scanf("%d%d", &level, &volume);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 2 ms 332 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 2 ms 588 KB Output is correct
7 Correct 2 ms 332 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 100 ms 3272 KB Output is correct
2 Correct 113 ms 3256 KB Output is correct

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 2 ms 332 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 2 ms 588 KB Output is correct
7 Correct 2 ms 332 KB Output is correct
8 Correct 100 ms 3272 KB Output is correct
9 Correct 113 ms 3256 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 940 ms 483624 KB Output is correct
12 Correct 154 ms 3844 KB Output is correct
13 Runtime error 936 ms 524292 KB Execution killed with signal 9
14 Halted 0 ms 0 KB -