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Submission #199936

# Submission time Handle Problem Language Result Execution time Memory
199936 2020-02-04T07:36:14 Z SamAnd Potatoes and fertilizers (LMIO19_bulves) C++17
24 / 100
 1000 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)
    {
        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:48:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int j = 1; j <= bb.size(); ++j)
                     ~~^~~~~~~~~~~~
bulves.cpp:50:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < aa.size(); ++i)
                     ~~^~~~~~~~~~~
bulves.cpp:52:36: warning: overflow in implicit constant conversion [-Woverflow]
         memset(ndp, INF, sizeof ndp);
                                    ^
bulves.cpp:53:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int j = 0; j < bb.size(); ++j)
                         ~~^~~~~~~~~~~
bulves.cpp:61:23: 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:68:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
bulves.cpp:71:14: 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 19 ms 760 KB Output is correct
5 Correct 26 ms 1144 KB Output is correct
6 Correct 78 ms 2296 KB Output is correct
7 Correct 153 ms 4216 KB Output is correct
8 Correct 104 ms 4216 KB Output is correct
9 Correct 121 ms 4216 KB Output is correct
10 Correct 104 ms 4216 KB Output is correct
11 Correct 102 ms 4344 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 19 ms 760 KB Output is correct
5 Correct 26 ms 1144 KB Output is correct
6 Correct 78 ms 2296 KB Output is correct
7 Correct 153 ms 4216 KB Output is correct
8 Correct 104 ms 4216 KB Output is correct
9 Correct 121 ms 4216 KB Output is correct
10 Correct 104 ms 4216 KB Output is correct
11 Correct 102 ms 4344 KB Output is correct
12 Runtime error 549 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 Correct 5 ms 760 KB Output is correct
4 Correct 371 ms 1144 KB Output is correct
5 Execution timed out 1096 ms 1144 KB Time limit exceeded
6 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 Correct 5 ms 760 KB Output is correct
5 Correct 371 ms 1144 KB Output is correct
6 Execution timed out 1096 ms 1144 KB Time limit exceeded
7 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 Correct 5 ms 760 KB Output is correct
5 Correct 371 ms 1144 KB Output is correct
6 Execution timed out 1096 ms 1144 KB Time limit exceeded
7 Halted 0 ms 0 KB -