oj.uz

Submission #255243

# Submission time Handle Problem Language Result Execution time Memory
255243 2020-07-31T16:00:30 Z Kastanda Election (BOI18_election) C++11
100 / 100
 976 ms 43504 KB 
// M
#include<bits/stdc++.h>
#define lc (id << 1)
#define rc (lc ^ 1)
#define md ((l + r) >> 1)
using namespace std;
const int N = 500005, MXS = N * 4;
int n, q, R[N];
char A[N];
int LZ[MXS], MN[MXS];
vector < pair < int , int > > V[N];
inline void Shift(int id)
{
        LZ[lc] += LZ[id];
        MN[lc] += LZ[id];
        LZ[rc] += LZ[id];
        MN[rc] += LZ[id];
        LZ[id] = 0;
}
void Add(int le, int ri, int val, int id = 1, int l = 0, int r = n + 1)
{
        if (ri <= l || r <= le)
                return ;
        if (le <= l && r <= ri)
        {
                LZ[id] += val;
                MN[id] += val;
                return ;
        }
        Shift(id);
        Add(le, ri, val, lc, l, md);;
        Add(le, ri, val, rc, md, r);
        MN[id] = min(MN[lc], MN[rc]);
}
int GetMin(int le, int ri, int id = 1, int l = 0, int r = n + 1)
{
        if (ri <= l || r <= le)
                return MXS;
        if (le <= l && r <= ri)
                return MN[id];
        Shift(id);
        return min(GetMin(le, ri, lc, l, md), GetMin(le, ri, rc, md, r));
}
int main()
{
        scanf("%d%s%d", &n, &A[1], &q);
        for (int i = 1; i <= q; i ++)
        {
                int l, r;
                scanf("%d%d", &l, &r);
                V[r].push_back({i, l});
        }
        vector < int > stk;
        for (int i = 1; i <= n; i ++)
        {
                if (A[i] == 'C')
                {
                        if (stk.size())
                                Add(stk.back(), n + 1, -1), stk.pop_back();
                        Add(i, n + 1, 1);
                }
                else
                        stk.push_back(i);
                for (auto X : V[i])
                        R[X.first] = (int)stk.size() - (int)(lower_bound(stk.begin(), stk.end(), X.second) - stk.begin()) + max(-(GetMin(X.second, i + 1) - GetMin(X.second - 1, X.second)), 0);
        }
        for (int i = 1; i <= q; i ++)
                printf("%d\n", R[i]);
        return 0;
}

Compilation message

election.cpp: In function 'int main()':
election.cpp:46:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%s%d", &n, &A[1], &q);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
election.cpp:50:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
                 scanf("%d%d", &l, &r);
                 ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 12160 KB Output is correct
2 Correct 10 ms 12160 KB Output is correct
3 Correct 9 ms 12160 KB Output is correct
4 Correct 11 ms 12160 KB Output is correct
5 Correct 9 ms 12160 KB Output is correct

Subtask #2
54.0 / 54.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 12160 KB Output is correct
2 Correct 10 ms 12160 KB Output is correct
3 Correct 9 ms 12160 KB Output is correct
4 Correct 11 ms 12160 KB Output is correct
5 Correct 9 ms 12160 KB Output is correct
6 Correct 98 ms 17016 KB Output is correct
7 Correct 86 ms 16632 KB Output is correct
8 Correct 90 ms 16996 KB Output is correct
9 Correct 87 ms 17016 KB Output is correct
10 Correct 96 ms 16888 KB Output is correct
11 Correct 98 ms 17144 KB Output is correct
12 Correct 95 ms 17272 KB Output is correct
13 Correct 97 ms 17272 KB Output is correct
14 Correct 97 ms 17144 KB Output is correct
15 Correct 95 ms 17016 KB Output is correct

Subtask #3
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 12160 KB Output is correct
2 Correct 10 ms 12160 KB Output is correct
3 Correct 9 ms 12160 KB Output is correct
4 Correct 11 ms 12160 KB Output is correct
5 Correct 9 ms 12160 KB Output is correct
6 Correct 98 ms 17016 KB Output is correct
7 Correct 86 ms 16632 KB Output is correct
8 Correct 90 ms 16996 KB Output is correct
9 Correct 87 ms 17016 KB Output is correct
10 Correct 96 ms 16888 KB Output is correct
11 Correct 98 ms 17144 KB Output is correct
12 Correct 95 ms 17272 KB Output is correct
13 Correct 97 ms 17272 KB Output is correct
14 Correct 97 ms 17144 KB Output is correct
15 Correct 95 ms 17016 KB Output is correct
16 Correct 976 ms 41864 KB Output is correct
17 Correct 739 ms 39032 KB Output is correct
18 Correct 767 ms 40184 KB Output is correct
19 Correct 752 ms 41680 KB Output is correct
20 Correct 837 ms 40820 KB Output is correct
21 Correct 885 ms 43124 KB Output is correct
22 Correct 863 ms 43000 KB Output is correct
23 Correct 869 ms 43504 KB Output is correct
24 Correct 865 ms 42868 KB Output is correct
25 Correct 903 ms 42144 KB Output is correct