oj.uz

Submission #64211

# Submission time Handle Problem Language Result Execution time Memory
64211 2018-08-03T13:46:08 Z antimirage parentrises (BOI18_parentrises) C++17
11 / 100
 4 ms 720 KB 
#include <iostream>
#include <assert.h>
#include <stdio.h>
#include <iomanip>
#include <utility>
#include <string.h>
#include <random>
#include <math.h>
#include <time.h>
#include <vector>
#include <set>
#include <map>

#define fr first
#define sc second
#define mk make_pair
#define pb push_back
#define sz(s) (int)s.size()
#define all(s) s.begin(), s.end()

using namespace std;

const int N = 1e6 + 5;

int type, tests, pref[2][N], n, mn[2], bal1, bal2, sum[2][N], bal;

char s[N], ans[N];

bool fl;

main()
{
    cin >> type >> tests;
    while (tests--)
    {
        fl = false;
        bal = 0;
        scanf("%s", s + 1);

        n = strlen(s + 1);

        for (int i = 1; i <= n; i++)
        {
            pref[0][i] = pref[1][i] = 0;
            sum[0][i] = sum[1][i] = 0;
            if ( s[i] == '(' )
                pref[0][i] = 1, pref[1][i] = 1, ans[i] = 'G', bal += 2;
            else
            {
                if (pref[0][i - 1] > pref[1][i - 1])
                    ans[i] = 'R', pref[0][i] = -1;
                else
                    ans[i] = 'B', pref[1][i] = -1;

                bal--;
            }
            pref[0][i] += pref[0][i - 1];
            pref[1][i] += pref[1][i - 1];

            if (bal < 0)
                fl = 1;
        }
        bal1 = pref[0][n];
        bal2 = pref[1][n];
        mn[0] = mn[1] = 1e9 + 7;

        for (int i = n; i >= 1; i--)
        {
            mn[0] = min( mn[0], pref[0][i] );
            mn[1] = min( mn[1], pref[1][i] );
            if ( ans[i] == 'R' && mn[1] > 0 )
            {
                sum[1][i] = -1;
                ans[i] = 'G';
                mn[1]--;
                bal2--;
            }
            if ( ans[i] == 'B' && mn[0] > 0)
            {
                sum[0][i] = -1;
                ans[i] = 'G';
                mn[0]--;
                bal1--;
            }
        }
        for (int i = 1; i <= n; i++)
        {
            sum[0][i] += sum[0][i - 1];
            sum[1][i] += sum[1][i - 1];
            pref[0][i] += sum[0][i];
            pref[1][i] += sum[1][i];
        }
        mn[0] = mn[1] = 1e9 + 7;

        for (int i = n; i >= 1; i--)
        {
            mn[0] = min( mn[0], pref[0][i] );
            mn[1] = min( mn[1], pref[1][i] );
            if (s[i] == ')') continue;
            if (mn[0] > 0 && bal1 > bal2)
            {
                ans[i] = 'B';
                mn[0]--;
                bal1--;
            }
            else if (mn[1] > 0)
            {
                ans[i] = 'R';
                mn[1]--;
                bal2--;
            }
        }
        if (bal < 0 || bal > n) fl = 1;

        if (fl)
            puts("impossible");
        else
        {
            for (int i = 1; i <= n; i++)
                printf("%c", ans[i]);
            printf("\n");
        }
    }
}

Compilation message

parentrises.cpp:31:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
parentrises.cpp: In function 'int main()':
parentrises.cpp:38:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s", s + 1);
         ~~~~~^~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 376 KB Output is correct
2 Correct 3 ms 488 KB Output is correct
3 Correct 2 ms 488 KB Output is correct
4 Correct 3 ms 488 KB Output is correct
5 Incorrect 3 ms 488 KB Output isn't correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 508 KB Output is correct
2 Correct 3 ms 636 KB Output is correct
3 Correct 2 ms 636 KB Output is correct
4 Correct 2 ms 636 KB Output is correct
5 Correct 4 ms 636 KB Output is correct

Subtask #3
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 508 KB Output is correct
2 Correct 3 ms 636 KB Output is correct
3 Correct 2 ms 636 KB Output is correct
4 Correct 2 ms 636 KB Output is correct
5 Correct 4 ms 636 KB Output is correct
6 Incorrect 3 ms 636 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #4
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 508 KB Output is correct
2 Correct 3 ms 636 KB Output is correct
3 Correct 2 ms 636 KB Output is correct
4 Correct 2 ms 636 KB Output is correct
5 Correct 4 ms 636 KB Output is correct
6 Incorrect 3 ms 636 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #5
0 / 6.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 720 KB Expected integer, but "impossible" found

Subtask #6
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 720 KB Expected integer, but "impossible" found

Subtask #7
0 / 28.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 720 KB Expected integer, but "impossible" found