oj.uz

Submission #199938

# Submission time Handle Problem Language Result Execution time Memory
199938 2020-02-04T07:37:55 Z SamAnd Potatoes and fertilizers (LMIO19_bulves) C++17
24 / 100
 548 ms 262148 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 500005, M = 30004;
const long long INF = 1000000009000000009;

int n;
int a[N], b[N];
long long sa, sb;

void solv1()
{
    long long ans = 0;
    int j = 1;
    for (int i = 1; i <= n; ++i)
    {
        while (1)
        {
            if (b[j] >= a[i])
            {
                ans += abs(i - j) * 1LL * a[i];
                b[j] -= a[i];
                a[i] = 0;
                break;
            }
            else
            {
                ans += abs(i - j) * 1LL * b[j];
                a[i] -= b[j];
                b[j] = 0;
                ++j;
            }
        }
    }
    printf("%lld\n", ans);
}

long long dp[M], ndp[M];
void solv3()
{
    vector<int> aa, bb;
    for (int i = 1; i <= n; ++i)
    {
        int minu = (a[i] - b[i]);
        a[i] -= minu;
        b[i] -= minu;
        for (int j = 0; j < a[i]; ++j)
            bb.push_back(i);
        for (int j = 0; j < b[i]; ++j)
            aa.push_back(i);
    }
    for (int j = 1; j <= bb.size(); ++j)
        dp[j] = INF;
    for (int i = 0; i < aa.size(); ++i)
    {
        memset(ndp, INF, sizeof ndp);
        for (int j = 0; j < bb.size(); ++j)
        {
            dp[j + 1] = min(dp[j + 1], dp[j]);
            ndp[j + 1] = min(ndp[j + 1], dp[j] + abs(aa[i] - bb[j]));
        }
        memcpy(dp, ndp, sizeof ndp);
    }
    long long ans = INF;
    for (int j = 0; j <= bb.size(); ++j)
        ans = min(ans, dp[j]);
    printf("%lld\n", ans);
}

int main()
{
    scanf("%d", &n);
    for (int i = 1; i <= n; ++i)
    {
        scanf("%d%d", &a[i], &b[i]);
        sa += a[i];
        sb += b[i];
    }
    if (sa == sb)
        solv1();
    else
        solv3();
    return 0;
}

Compilation message

bulves.cpp: In function 'void solv3()':
bulves.cpp:51:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int j = 1; j <= bb.size(); ++j)
                     ~~^~~~~~~~~~~~
bulves.cpp:53:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < aa.size(); ++i)
                     ~~^~~~~~~~~~~
bulves.cpp:55:36: warning: overflow in implicit constant conversion [-Woverflow]
         memset(ndp, INF, sizeof ndp);
                                    ^
bulves.cpp:56:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int j = 0; j < bb.size(); ++j)
                         ~~^~~~~~~~~~~
bulves.cpp:64:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int j = 0; j <= bb.size(); ++j)
                     ~~^~~~~~~~~~~~
bulves.cpp: In function 'int main()':
bulves.cpp:71:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
bulves.cpp:74:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &a[i], &b[i]);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 6 ms 376 KB Output is correct
4 Correct 16 ms 760 KB Output is correct
5 Correct 27 ms 1144 KB Output is correct
6 Correct 84 ms 2296 KB Output is correct
7 Correct 155 ms 4216 KB Output is correct
8 Correct 108 ms 4212 KB Output is correct
9 Correct 151 ms 4216 KB Output is correct
10 Correct 103 ms 4216 KB Output is correct
11 Correct 108 ms 4216 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 6 ms 376 KB Output is correct
4 Correct 16 ms 760 KB Output is correct
5 Correct 27 ms 1144 KB Output is correct
6 Correct 84 ms 2296 KB Output is correct
7 Correct 155 ms 4216 KB Output is correct
8 Correct 108 ms 4212 KB Output is correct
9 Correct 151 ms 4216 KB Output is correct
10 Correct 103 ms 4216 KB Output is correct
11 Correct 108 ms 4216 KB Output is correct
12 Runtime error 548 ms 262148 KB Execution killed with signal 9 (could be triggered by violating memory limits)
13 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Incorrect 5 ms 760 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 6 ms 376 KB Output is correct
4 Incorrect 5 ms 760 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 376 KB Output is correct
2 Correct 5 ms 376 KB Output is correct
3 Correct 6 ms 376 KB Output is correct
4 Incorrect 5 ms 760 KB Output isn't correct
5 Halted 0 ms 0 KB -