Time Limit:2000MS Memory Limit:262144KB 64bit IO Format:%I64d & %I64u
Description
Mike and some bears are playing a game just for fun. Mike is the judge. All bears except Mike are standing in an n × m grid, there's exactly one bear in each cell. We denote the bear standing in column number j of row number i by (i, j). Mike's hands are on his ears (since he's the judge) and each bear standing in the grid has hands either on his mouth or his eyes.
They play for q rounds. In each round, Mike chooses a bear (i, j) and tells him to change his state i. e. if his hands are on his mouth, then he'll put his hands on his eyes or he'll put his hands on his mouth otherwise. After that, Mike wants to know the score of the bears.
Score of the bears is the maximum over all rows of number of consecutive bears with hands on their eyes in that row.
Since bears are lazy, Mike asked you for help. For each round, tell him the score of these bears after changing the state of a bear selected in that round.
Output
After each round, print the current score of the bears.
题意:
有n*m只萌熊做运♂动,有蒙眼和捂嘴两种表情,给出q个坐标,每个坐标对应的熊变换一下表情,求单行最长连续蒙眼熊的个数。
爆爆爆!!!
附AC代码:
#include<iostream>
#include<cstring>
#include<cmath>
using namespace std;
int a[510][510];
int main(){
int n,m,q,x,y,ans;
cin>>n>>m>>q;
for(int i=1;i<=n;i++){
for(int j=1;j<=m;j++){
cin>>a[i][j];
}
}
for(int i=0;i<q;i++){
cin>>x>>y;
a[x][y]=!a[x][y];//表情转换
int MAXN=-1;
for(int s=1;s<=n;s++){
ans=0;
for(int t=1;t<=m;t++){
if(a[s][t]==0)
ans=0;
else
ans++;
MAXN=max(MAXN,ans);//记录最大值
}
}
cout<<MAXN<<endl;
}
return 0;
}