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Submission #485902

# Submission time Handle Problem Language Result Execution time Memory
485902 2021-11-09T16:12:11 Z gavgav Fountain (eJOI20_fountain) C++17
100 / 100
 120 ms 7364 KB 
#include <stdio.h>
#define MAX_N 100000
#define MAX_M 200000
#define MAX_S 100000000000000
struct reservoir {
    long long diameters, capacity;
};
struct query {
    int level, volume, rasp;
};
int stack[MAX_N + 1], next[MAX_M + 1], liste[MAX_N + 1];
long long sumaNec[MAX_N + 1];
int main() {
    long long height, queries_number, top, i, j;
    long long sumaV;
    scanf( "%lld%lld", &height, &queries_number);
    struct reservoir reservoirs[height + 1];
    struct query queries[queries_number + 1];
    reservoirs[0].diameters = 1000000001;
    reservoirs[0].capacity = 0;
    for (i = 1; i <= height; ++i)
        scanf( "%lld%lld", &reservoirs[i].diameters, &reservoirs[i].capacity);
    for (i = 1; i <= queries_number; ++i) {
        scanf( "%d%d", &queries[i].level, &queries[i].volume);
        next[i] = liste[queries[i].level];
        liste[queries[i].level] = i;
    }
    stack[0] = 0;
    sumaNec[0] = -MAX_S - 1;
    top = 0;
    sumaV = 0;
    long long left, middle, right;
    for (i = height; i >= 1; --i) {
        while ( reservoirs[i].diameters >= reservoirs[stack[top]].diameters ) {
            sumaV -= reservoirs[stack[top]].capacity;
            --top;
        }
        ++top;
        stack[top] = i;
        sumaNec[top] = sumaV;
        sumaV += reservoirs[i].capacity;
        j = liste[i];
        while (j != 0) {
            right = top + 1;
            left = 0;
            while (right - left > 1 ) {
                middle = (right + left) / 2;
                if (sumaV - sumaNec[middle] >= queries[j].volume)
                    left = middle;
                else
                    right = middle;
            }
            queries[j].rasp = stack[left];
            j = next[j];
        }
    }
    for (i = 1; i <= queries_number; ++i)
        printf("%d\n", queries[i].rasp);
}

Compilation message

fountain.cpp: In function 'int main()':
fountain.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     scanf( "%lld%lld", &height, &queries_number);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fountain.cpp:22:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         scanf( "%lld%lld", &reservoirs[i].diameters, &reservoirs[i].capacity);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fountain.cpp:24:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         scanf( "%d%d", &queries[i].level, &queries[i].volume);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 5628 KB Output is correct
2 Correct 82 ms 5828 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 96 ms 5628 KB Output is correct
9 Correct 82 ms 5828 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 42 ms 3344 KB Output is correct
12 Correct 115 ms 7364 KB Output is correct
13 Correct 120 ms 6740 KB Output is correct
14 Correct 74 ms 6488 KB Output is correct
15 Correct 72 ms 6468 KB Output is correct