Task: | Forest density |
Sender: | eyong002 |
Submission time: | 2024-09-23 16:59:47 +0300 |
Language: | C++ (C++11) |
Status: | READY |
Result: | ACCEPTED |
test | verdict | time | |
---|---|---|---|
#1 | ACCEPTED | 0.00 s | details |
#2 | ACCEPTED | 0.58 s | details |
#3 | ACCEPTED | 0.56 s | details |
Code
#include <iostream>#include <vector>using namespace std;int findTrees(int a, int b, int c, int d, vector<vector<int>>& segment) {return segment[c][d] - (b > 0 ? segment[c][b-1] : 0) - (a > 0 ? segment[a-1][d] : 0)+ (a > 0 && b > 0 ? segment[a-1][b-1] : 0);}void updateSegment(vector<vector<int>>& segment, vector<vector<char>>& forest) {int n = segment.size();segment[0][0] = (forest[0][0] == '*') ? 1 : 0;for (int i = 1; i < n; i++) {segment[i][0] = segment[i-1][0] + (forest[i][0] == '*' ? 1 : 0);segment[0][i] = segment[0][i-1] + (forest[0][i] == '*' ? 1 : 0);}for (int i = 1; i < n; i++) {for (int j = 1; j < n; j++) {segment[i][j] = segment[i-1][j] + segment[i][j-1] - segment[i-1][j-1]+ (forest[i][j] == '*' ? 1 : 0);}}}int main() {int n, q;cin >> n >> q;vector<vector<char>> forest(n, vector<char>(n));for (int i = 0; i < n; i++) {for (int j = 0; j < n; j++) {cin >> forest[i][j];}}vector<vector<int>> segment(n, vector<int>(n, 0));updateSegment(segment, forest);vector<vector<int>> queries(q, vector<int>(4));for (int i = 0; i < q; i++){for (int j = 0; j < 4; j++){cin >> queries[i][j];}}for (int i = 0; i < q; i++) {int sol = findTrees(queries[i][0]-1, queries[i][1]-1, queries[i][2]-1, queries[i][3]-1, segment);cout << sol << endl;}return 0;}
Test details
Test 1
Verdict: ACCEPTED
input |
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10 100 **.*.*.**. *.**.*..*. .*****.**. **....***. ... |
correct output |
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10 14 5 7 8 ... |
user output |
---|
10 14 5 7 8 ... Truncated |
Test 2
Verdict: ACCEPTED
input |
---|
1000 200000 **.**.****..**.***..**.***.**.... |
correct output |
---|
41079 2824 15631 1548 8483 ... |
user output |
---|
41079 2824 15631 1548 8483 ... Truncated |
Test 3
Verdict: ACCEPTED
input |
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1000 200000 ******************************... |
correct output |
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1000000 1000000 1000000 1000000 1000000 ... |
user output |
---|
1000000 1000000 1000000 1000000 1000000 ... Truncated |