oj.uz

답안 #242377

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
242377 2020-06-27T13:01:31 Z mhy908 Collecting Mushrooms (NOI18_collectmushrooms) C++14
60 / 100
 57 ms 20856 KB 
#include <bits/stdc++.h>
#define eb emplace_back
#define mp make_pair
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define svec(x) sort(x.begin(), x.end())
#define press(x) x.erase(unique(x.begin(), x.end()), x.end())
#define lb(x, v) lower_bound(x.begin(), x.end(), v)
#define ub(x, v) upper_bound(x.begin(), x.end(), v)
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
typedef pair<LL, LL> pll;
typedef pair<int, LL> pil;
typedef pair<LL, int> pli;
const LL llinf=2000000000000000000;
const LL mod1=1000000007;
const LL mod2=998244353;
const int inf=2000000000;

struct FENWICK{
    int tree[100010];
    int sum(int i){
        LL ans=0;
        while(i){
            ans+=tree[i];
            i-=(i&-i);
        }
        return ans;
    }
    int update(int i, LL num){
        while(i<=100000){
            tree[i]+=num;
            i+=(i&-i);
        }
    }
    void cl(){memset(tree, 0, sizeof tree);}
}fen;
int n, m, r, k, p;
vector<char> arr[100010];
vector<int> ans[100010];


vector<int> ndel[100010];
int main(){
    scanf("%d %d %d %d", &n, &m, &r, &k);
    for(int i=1; i<=n; i++){
        arr[i].resize(m+1);
        ans[i].resize(m+1);
    }
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            scanf(" %c", &arr[i][j]);
        }
    }
    for(int i=1; i<=n; i++){
        for(int j=1; j<=m; j++){
            if(arr[i][j]=='S'){
                fen.update(max(1, j-r), 1);
                fen.update(min(m, j+r)+1, -1);
                if(i+r<n)ndel[i+r+1].eb(j);
            }
        }
        for(auto j:ndel[i]){
            fen.update(max(1, j-r), -1);
            fen.update(min(m, j+r)+1, 1);
        }
        ndel[i].clear();
        for(int j=1; j<=m; j++){
            if(arr[i][j]=='M'){
                ans[i][j]+=fen.sum(j);
            }
        }
    }
    fen.cl();
    for(int i=n; i>=1; i--){
        for(auto j:ndel[i]){
            fen.update(max(1, j-r), -1);
            fen.update(min(m, j+r)+1, 1);
        }
        ndel[i].clear();
        for(int j=1; j<=m; j++){
            if(arr[i][j]=='M'){
                ans[i][j]+=fen.sum(j);
                if(ans[i][j]>=k)p++;
            }
        }
        for(int j=1; j<=m; j++){
            if(arr[i][j]=='S'){
                fen.update(max(1, j-r), 1);
                fen.update(min(m, j+r)+1, -1);
                if(i-r>1)ndel[i-r-1].eb(j);
            }
        }
    }
    printf("%d", p);
}

Compilation message

mushrooms.cpp: In member function 'int FENWICK::update(int, LL)':
mushrooms.cpp:37:5: warning: no return statement in function returning non-void [-Wreturn-type]
     }
     ^
mushrooms.cpp: In function 'int main()':
mushrooms.cpp:47:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %d %d", &n, &m, &r, &k);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mushrooms.cpp:54:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf(" %c", &arr[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 7808 KB Output is correct
2 Correct 11 ms 7808 KB Output is correct
3 Correct 11 ms 7808 KB Output is correct
4 Correct 10 ms 7808 KB Output is correct
5 Correct 9 ms 7808 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 7808 KB Output is correct
2 Correct 11 ms 7808 KB Output is correct
3 Correct 11 ms 7808 KB Output is correct
4 Correct 10 ms 7808 KB Output is correct
5 Correct 9 ms 7808 KB Output is correct
6 Correct 9 ms 7808 KB Output is correct
7 Correct 9 ms 7808 KB Output is correct
8 Correct 12 ms 7808 KB Output is correct
9 Correct 9 ms 7808 KB Output is correct
10 Correct 9 ms 7808 KB Output is correct

Subtask #3
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 7808 KB Output is correct
2 Correct 10 ms 7808 KB Output is correct
3 Correct 10 ms 7808 KB Output is correct
4 Correct 10 ms 7808 KB Output is correct
5 Correct 9 ms 7808 KB Output is correct

Subtask #4
23.0 / 23.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 9080 KB Output is correct
2 Correct 28 ms 8952 KB Output is correct
3 Correct 27 ms 9216 KB Output is correct
4 Correct 26 ms 8960 KB Output is correct
5 Correct 25 ms 9008 KB Output is correct

Subtask #5
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 57 ms 20856 KB Execution killed with signal 11 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #6
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 7808 KB Output is correct
2 Correct 11 ms 7808 KB Output is correct
3 Correct 11 ms 7808 KB Output is correct
4 Correct 10 ms 7808 KB Output is correct
5 Correct 9 ms 7808 KB Output is correct
6 Correct 9 ms 7808 KB Output is correct
7 Correct 9 ms 7808 KB Output is correct
8 Correct 12 ms 7808 KB Output is correct
9 Correct 9 ms 7808 KB Output is correct
10 Correct 9 ms 7808 KB Output is correct
11 Correct 9 ms 7808 KB Output is correct
12 Correct 10 ms 7808 KB Output is correct
13 Correct 10 ms 7808 KB Output is correct
14 Correct 10 ms 7808 KB Output is correct
15 Correct 9 ms 7808 KB Output is correct
16 Correct 23 ms 9080 KB Output is correct
17 Correct 28 ms 8952 KB Output is correct
18 Correct 27 ms 9216 KB Output is correct
19 Correct 26 ms 8960 KB Output is correct
20 Correct 25 ms 9008 KB Output is correct
21 Runtime error 57 ms 20856 KB Execution killed with signal 11 (could be triggered by violating memory limits)
22 Halted 0 ms 0 KB -