//
// main.cpp
// lam
//
// Created by Michał Kowalski on 15/03/2024.
//
#include <iostream>
#include <vector>
using namespace std;
int H,W;
vector<string> B;
vector<vector<int> > S;
void clear_row(int index, char c) {
if (c == '*') return;
int len = B[index].length();
for(int i=0;i<len;++i) B[index][i]='*';
S.push_back({'R',index+1,c});
}
void clear_col(int index, char c) {
if (c == '*') return;
for(int i=0;i<H;++i) B[i][index]='*';
S.push_back({'K',index+1,c});
}
char can_clear_row(int index) {
int last_c = '*';
for (char c: B[index]) {
if (c == '*') continue;
if (last_c != c && last_c == '*') {
last_c = c;
} else if (last_c != c && last_c != '*') {
return 0;
}
}
return last_c;
}
char can_clear_column(int index) {
int last_c = '*';
for (int i=0;i<H;++i) {
char c = B[i][index];
if (c == '*') continue;
if (last_c != c && last_c == '*') {
last_c = c;
} else if (last_c != c && last_c != '*') {
return 0;
}
}
return last_c;
}
int main() {
S.reserve(10000);
scanf("%d %d",&H,&W);
for (int i=0;i<H;++i) {
char l[3000];
scanf("%s",l);
B.push_back(l);
}
vector<int> columns;
vector<int> rows;
for(int i=0;i<H;++i) rows.push_back(i);
for(int i=0;i<W;++i) columns.push_back(i);
while (!rows.empty() && !columns.empty()) {
// for each row
for (auto it = rows.begin();it<rows.end();) {
char c = can_clear_row(*it);
if (c != 0) {
clear_row(*it, c);
rows.erase(it);
} else {
++it;
}
}
// for each col
for (auto it = columns.begin();it<columns.end();) {
char c = can_clear_column(*it);
if (c != 0) {
clear_col(*it, c);
columns.erase(it);
} else {
++it;
}
}
}
// print solution
printf("%d\n",S.size());
for(auto it = S.rbegin();it<S.rend();++it) {
printf("%c %d %c\n",(*it)[0],(*it)[1],(*it)[2]);
}
return 0;
}
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | // // main.cpp // lam // // Created by Michał Kowalski on 15/03/2024. // #include <iostream> #include <vector> using namespace std; int H,W; vector<string> B; vector<vector<int> > S; void clear_row(int index, char c) { if (c == '*') return; int len = B[index].length(); for(int i=0;i<len;++i) B[index][i]='*'; S.push_back({'R',index+1,c}); } void clear_col(int index, char c) { if (c == '*') return; for(int i=0;i<H;++i) B[i][index]='*'; S.push_back({'K',index+1,c}); } char can_clear_row(int index) { int last_c = '*'; for (char c: B[index]) { if (c == '*') continue; if (last_c != c && last_c == '*') { last_c = c; } else if (last_c != c && last_c != '*') { return 0; } } return last_c; } char can_clear_column(int index) { int last_c = '*'; for (int i=0;i<H;++i) { char c = B[i][index]; if (c == '*') continue; if (last_c != c && last_c == '*') { last_c = c; } else if (last_c != c && last_c != '*') { return 0; } } return last_c; } int main() { S.reserve(10000); scanf("%d %d",&H,&W); for (int i=0;i<H;++i) { char l[3000]; scanf("%s",l); B.push_back(l); } vector<int> columns; vector<int> rows; for(int i=0;i<H;++i) rows.push_back(i); for(int i=0;i<W;++i) columns.push_back(i); while (!rows.empty() && !columns.empty()) { // for each row for (auto it = rows.begin();it<rows.end();) { char c = can_clear_row(*it); if (c != 0) { clear_row(*it, c); rows.erase(it); } else { ++it; } } // for each col for (auto it = columns.begin();it<columns.end();) { char c = can_clear_column(*it); if (c != 0) { clear_col(*it, c); columns.erase(it); } else { ++it; } } } // print solution printf("%d\n",S.size()); for(auto it = S.rbegin();it<S.rend();++it) { printf("%c %d %c\n",(*it)[0],(*it)[1],(*it)[2]); } return 0; } |
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