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USACO castle
<pre name="code" class="cpp"><pre>USER: Kevin Samuel [kevin_s1] TASK: castle LANG: C++ Compiling... Compile: OK Executing... Test 1: TEST OK [0.003 secs, 3688 KB] Test 2: TEST OK [0.005 secs, 3688 KB] Test 3: TEST OK [0.008 secs, 3688 KB] Test 4: TEST OK [0.008 secs, 3688 KB] Test 5: TEST OK [0.003 secs, 3688 KB] Test 6: TEST OK [0.005 secs, 3688 KB] Test 7: TEST OK [0.014 secs, 3688 KB] Test 8: TEST OK [0.005 secs, 3688 KB] All tests OK. <p>Your program ('castle') produced all correct answers! This is your submission #4 for this problem. <strong>Congratulations!</strong></p>
/* ID:kevin_s1 PROG:castle LANG:C++ */ #include <iostream> #include <cstdio> #include <string> #include <cstring> #include <vector> #include <map> #include <set> #include <algorithm> #include <cstdlib> #include <list> #include <queue> #include <cmath> using namespace std; #define MAXM 100 //gobal variable==== int M,N; int direct[4][2] = {{-1, 0},{1, 0},{0, 1},{0, -1}}; //north, south, east, west int castle[MAXM][MAXM]; int visited[MAXM][MAXM]; int visited2[MAXM][MAXM]; int visited3[MAXM][MAXM]; int hasWall[MAXM][MAXM][4]; int cnt, maxarea; int _count; //================== //function========== void Dec(){ for(int i = 1; i <= N; i++){ for(int j = 1; j <= M; j++){ int wall = castle[i][j]; if(wall >= 8){ hasWall[i][j][1] = 1; wall = wall - 8; } if(wall >= 4){ hasWall[i][j][2] = 1; wall = wall - 4; } if(wall >= 2){ hasWall[i][j][0] = 1; wall = wall - 2; } if(wall >= 1){ hasWall[i][j][3] = 1; wall = wall - 1; } } } } void DFS(int x, int y, int type){ if(x < 1 || x > N || y < 1 || y > M) return; if(visited[x][y] != 0) return; visited[x][y] = type; visited2[x][y] = type; _count++; if(_count > maxarea){ maxarea = _count; } for(int d = 0; d < 4; d++){ if(hasWall[x][y][d] == 0){ int xx = x + direct[d][0]; int yy = y + direct[d][1]; DFS(xx, yy, type); } } return; } void DFS1(int x, int y, int type, int color){ if(x < 1 || x > N || y < 1 || y > M) return; if(visited[x][y] != type) return; if(visited3[x][y] == 1) return; visited[x][y] = color; visited3[x][y] = 1; for(int d = 0; d < 4; d++){ if(hasWall[x][y][d] == 0){ int xx = x + direct[d][0]; int yy = y + direct[d][1]; DFS1(xx, yy, type, color); } } return; } void print(){ for(int i = 1; i <= N; i++){ for(int j = 1; j <= M; j++){ cout<<visited[i][j]<<" "; } cout<<endl; } } void print2(){ for(int i = 1; i <= N; i++){ for(int j = 1; j <= M; j++){ cout<<visited2[i][j]<<" "; } cout<<endl; } } //================== int main(){ freopen("castle.in","r",stdin); freopen("castle.out","w",stdout); cin>>M>>N; for(int i = 1; i <= N; i++){ for(int j = 1; j <= M; j++){ cin>>castle[i][j]; } } memset(hasWall, 0, sizeof(hasWall)); memset(visited, 0, sizeof(visited)); memset(visited2, 0, sizeof(visited2)); memset(visited3, 0, sizeof(visited3)); Dec(); cnt = 0; maxarea = 0; int type = 1; for(int i = 1; i <= N; i++){ for(int j = 1; j <= M; j++){ if(visited[i][j] == 0){ _count = 0; DFS(i, j, type); cnt++; DFS1(i, j, type, _count); type++; } } } cout<<cnt<<endl; cout<<maxarea<<endl; //print2(); //print(); //enum the wall int mmaxarea = 0; int tx = 0, ty = 0, dir = 0; for(int x = 1; x <= N; x++){ for(int y = M; y >= 1; y--){ for(int d = 0; d < 4; d++){ if(hasWall[x][y][d] == 1){ int xx = x + direct[d][0]; int yy = y + direct[d][1]; if(xx >= 1 && xx <= N && yy >= 1 && yy <= M){ if((visited[x][y] + visited[xx][yy]) > mmaxarea && (visited2[x][y] != visited2[xx][yy])){ mmaxarea = visited[x][y] + visited[xx][yy]; tx = x; ty = y; dir = d; } if((visited[x][y] + visited[xx][yy]) == mmaxarea && (visited2[x][y] != visited2[xx][yy])){ if(y < ty){ tx = x; ty = y; dir = d; } if(y == ty && x > tx){ tx = x; ty = y; dir = d; } } } } } } } cout<<mmaxarea<<endl; if(dir == 1){ tx = tx + 1; dir = 0; } if(dir == 3){ ty = ty - 1; dir = 2; } cout<<tx<<" "<<ty<<" "; if(dir == 0) cout<<"N"<<endl; if(dir == 2) cout<<"E"<<endl; return 0; }
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