| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 885645 |
2023-12-10T11:18:01 Z |
alexdd |
Bomb (IZhO17_bomb) |
C++17 |
|
1000 ms |
58204 KB |
#include<iostream>
using namespace std;
int n,m;
char mat[2505][2505];
int sump[2505][2505];
int mars[2505][2505];
int pver[2505][2505];
bool verif(int cntx, int cnty)
{
if(pver[cntx][cnty]!=0)
{
if(pver[cntx][cnty]==-1)
return 0;
else
return 1;
}
for(int i=1;i<=n;i++)
for(int j=1;j<=m;j++)
mars[i][j]=0;
for(int i=1;i+cntx-1<=n;i++)
{
for(int j=1;j+cnty-1<=m;j++)
{
if(sump[i+cntx-1][j+cnty-1] - sump[i+cntx-1][j-1] - sump[i-1][j+cnty-1] + sump[i-1][j-1] == cntx*cnty)///toate is 1
{
mars[i][j]++;
mars[i][j+cnty]--;
mars[i+cntx][j]--;
mars[i+cntx][j+cnty]++;
}
mars[i][j] += mars[i-1][j] + mars[i][j-1] - mars[i-1][j-1];
if(mars[i][j]==0 && mat[i][j]=='1')
{
pver[cntx][cnty]=-1;
return 0;
}
}
}
pver[cntx][cnty]=1;
return 1;
}
void solve_n3_y(int minx, int miny)
{
int poz=0, mxm=0;
for(int i=minx;i>0;i--)
{
if(i*miny <= mxm)
break;
poz = max(poz, (mxm-1)/i+1);
while(poz+1<=miny && verif(i,poz+1))
{
poz++;
}
if(verif(i,poz)) mxm = max(mxm, i*poz);
}
cout<<mxm;
}
void solve_n3_x(int minx, int miny)
{
int poz=0, mxm=0;
for(int i=miny;i>0;i--)
{
if(i*minx <= mxm)
break;
poz = max(poz, (mxm-1)/i+1);
while(poz+1<=minx && verif(poz+1,i))
{
poz++;
}
if(verif(poz,i)) mxm = max(mxm, i*poz);
}
cout<<mxm;
}
int calcmax_x(int i, int st, int dr)
{
int mij,ans=0;
while(st<=dr)
{
mij=(st+dr)/2;
if(verif(mij,i))
{
ans = max(ans, mij);
st=mij+1;
}
else
{
dr=mij-1;
}
}
return ans;
}
int solve_bulaneala(int minx, int miny)
{
int mxm=0,prec=1;
for(int i=miny;i>max(0,miny-3);i--)
{
if(i*minx <= mxm)
break;
int st,dr,mij,ans=0;
st=max(prec, (mxm-1)/i+1);
dr=minx;
mxm = max(mxm, i*calcmax_x(i,st,dr));
prec=ans;
}
prec=1;
for(int i=minx;i>0;i--)
{
if(i*miny <= mxm)
break;
int st,dr,mij,ans=0;
st=max(prec, (mxm-1)/i+1);
dr=miny;
while(st<=dr)
{
mij=(st+dr)/2;
if(verif(i,mij))
{
ans = max(ans, mij);
st=mij+1;
}
else
{
dr=mij-1;
}
}
mxm = max(mxm, i*ans);
prec=ans;
}
return mxm;
}
int solve_cautare_ternara(int minx, int miny)
{
int st,dr;
st=1;
dr=miny;
while(dr-st+1>3)
{
int mij1 = st + (dr-st+1)/3;
int mij2 = mij1 + (dr-st+1)/3;
if(calcmax_x(mij1,1,minx)*mij1 > calcmax_x(mij2,1,minx)*mij2)
{
dr=mij2;
}
else
{
st=mij1;
}
}
int mxm=0;
for(int i=st;i<=dr;i++)
mxm = max(mxm, calcmax_x(i,1,minx)*i);
return mxm;
}
signed main()
{
cin>>n>>m;
int minx=n,miny=m;
for(int i=1;i<=n;i++)
{
for(int j=1;j<=m;j++)
{
cin>>mat[i][j];
sump[i][j] = sump[i-1][j] + sump[i][j-1] - sump[i-1][j-1];
if(mat[i][j]=='1')
sump[i][j]++;
}
}
for(int i=1;i<=n;i++)
{
for(int j=1;j<=m;j++)
{
if(mat[i][j]=='1' && (j==m || mat[i][j+1]=='0'))
{
int cnt=0;
for(int u=j;u>0;u--)
{
if(mat[i][u]=='0')
break;
cnt++;
}
miny = min(miny, cnt);
}
}
}
for(int i=1;i<=m;i++)
{
for(int j=1;j<=n;j++)
{
if(mat[j][i]=='1' && (j==n || mat[j+1][i]=='0'))
{
int cnt=0;
for(int u=j;u>0;u--)
{
if(mat[u][i]=='0')
break;
cnt++;
}
minx = min(minx, cnt);
}
}
}
if(1LL*miny * n * m <= 170000000)
{
solve_n3_y(minx,miny);
return 0;
}
else if(1LL*minx*n*m <= 170000000)
{
solve_n3_x(minx,miny);
return 0;
}
else if(1)
{
cout<<max(solve_bulaneala(minx,miny), solve_cautare_ternara(minx,miny));
return 0;
}
else
{
cout<<minx*miny;
return 0;
}
return 0;
}
Compilation message
bomb.cpp: In function 'int solve_bulaneala(int, int)':
bomb.cpp:99:19: warning: unused variable 'mij' [-Wunused-variable]
99 | int st,dr,mij,ans=0;
| ^~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 2 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 3 |
Correct |
10 ms |
42844 KB |
Output is correct |
| 4 |
Correct |
8 ms |
42844 KB |
Output is correct |
| 5 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 6 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 7 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 8 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 9 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 10 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 11 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 12 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 13 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 14 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 15 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 16 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 17 |
Correct |
1 ms |
6748 KB |
Output is correct |
| 18 |
Correct |
1 ms |
6748 KB |
Output is correct |
| 19 |
Correct |
2 ms |
7000 KB |
Output is correct |
| 20 |
Correct |
2 ms |
7004 KB |
Output is correct |
| 21 |
Correct |
1 ms |
6748 KB |
Output is correct |
| 22 |
Correct |
1 ms |
6748 KB |
Output is correct |
| 23 |
Correct |
2 ms |
7004 KB |
Output is correct |
| 24 |
Correct |
1 ms |
7004 KB |
Output is correct |
| 25 |
Correct |
2 ms |
7000 KB |
Output is correct |
| 26 |
Correct |
2 ms |
7004 KB |
Output is correct |
| 27 |
Correct |
6 ms |
12124 KB |
Output is correct |
| 28 |
Correct |
7 ms |
12120 KB |
Output is correct |
| 29 |
Incorrect |
29 ms |
12636 KB |
Output isn't correct |
| 30 |
Correct |
45 ms |
13472 KB |
Output is correct |
| 31 |
Correct |
32 ms |
12892 KB |
Output is correct |
| 32 |
Correct |
40 ms |
13140 KB |
Output is correct |
| 33 |
Correct |
111 ms |
15852 KB |
Output is correct |
| 34 |
Correct |
6 ms |
12380 KB |
Output is correct |
| 35 |
Correct |
46 ms |
15196 KB |
Output is correct |
| 36 |
Correct |
24 ms |
15364 KB |
Output is correct |
| 37 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 38 |
Correct |
990 ms |
57564 KB |
Output is correct |
| 39 |
Correct |
1 ms |
4440 KB |
Output is correct |
| 40 |
Correct |
970 ms |
24588 KB |
Output is correct |
| 41 |
Correct |
1 ms |
4444 KB |
Output is correct |
| 42 |
Correct |
2 ms |
7004 KB |
Output is correct |
| 43 |
Execution timed out |
1081 ms |
57472 KB |
Time limit exceeded |
| 44 |
Correct |
81 ms |
15956 KB |
Output is correct |
| 45 |
Execution timed out |
1083 ms |
57680 KB |
Time limit exceeded |
| 46 |
Correct |
722 ms |
57308 KB |
Output is correct |
| 47 |
Execution timed out |
1020 ms |
57784 KB |
Time limit exceeded |
| 48 |
Execution timed out |
1072 ms |
57428 KB |
Time limit exceeded |
| 49 |
Correct |
287 ms |
57320 KB |
Output is correct |
| 50 |
Execution timed out |
1072 ms |
57452 KB |
Time limit exceeded |
| 51 |
Execution timed out |
1014 ms |
57788 KB |
Time limit exceeded |
| 52 |
Execution timed out |
1075 ms |
57712 KB |
Time limit exceeded |
| 53 |
Execution timed out |
1061 ms |
57840 KB |
Time limit exceeded |
| 54 |
Execution timed out |
1035 ms |
57836 KB |
Time limit exceeded |
| 55 |
Execution timed out |
1047 ms |
57476 KB |
Time limit exceeded |
| 56 |
Correct |
749 ms |
57460 KB |
Output is correct |
| 57 |
Execution timed out |
1049 ms |
57596 KB |
Time limit exceeded |
| 58 |
Execution timed out |
1071 ms |
57428 KB |
Time limit exceeded |
| 59 |
Execution timed out |
1056 ms |
57940 KB |
Time limit exceeded |
| 60 |
Execution timed out |
1043 ms |
57424 KB |
Time limit exceeded |
| 61 |
Correct |
601 ms |
57508 KB |
Output is correct |
| 62 |
Execution timed out |
1022 ms |
57424 KB |
Time limit exceeded |
| 63 |
Execution timed out |
1055 ms |
57516 KB |
Time limit exceeded |
| 64 |
Execution timed out |
1008 ms |
57424 KB |
Time limit exceeded |
| 65 |
Execution timed out |
1062 ms |
57428 KB |
Time limit exceeded |
| 66 |
Correct |
384 ms |
57936 KB |
Output is correct |
| 67 |
Execution timed out |
1025 ms |
57312 KB |
Time limit exceeded |
| 68 |
Execution timed out |
1057 ms |
57316 KB |
Time limit exceeded |
| 69 |
Execution timed out |
1071 ms |
57428 KB |
Time limit exceeded |
| 70 |
Execution timed out |
1062 ms |
50264 KB |
Time limit exceeded |
| 71 |
Execution timed out |
1039 ms |
57496 KB |
Time limit exceeded |
| 72 |
Execution timed out |
1002 ms |
57316 KB |
Time limit exceeded |
| 73 |
Execution timed out |
1056 ms |
57476 KB |
Time limit exceeded |
| 74 |
Execution timed out |
1054 ms |
57500 KB |
Time limit exceeded |
| 75 |
Execution timed out |
1041 ms |
57680 KB |
Time limit exceeded |
| 76 |
Execution timed out |
1034 ms |
57316 KB |
Time limit exceeded |
| 77 |
Execution timed out |
1012 ms |
57316 KB |
Time limit exceeded |
| 78 |
Execution timed out |
1041 ms |
57424 KB |
Time limit exceeded |
| 79 |
Execution timed out |
1028 ms |
58196 KB |
Time limit exceeded |
| 80 |
Execution timed out |
1054 ms |
58204 KB |
Time limit exceeded |
| 81 |
Execution timed out |
1066 ms |
57672 KB |
Time limit exceeded |
| 82 |
Execution timed out |
1047 ms |
57560 KB |
Time limit exceeded |
| 83 |
Execution timed out |
1071 ms |
57428 KB |
Time limit exceeded |
| 84 |
Execution timed out |
1038 ms |
57696 KB |
Time limit exceeded |
| 85 |
Execution timed out |
1058 ms |
57448 KB |
Time limit exceeded |
| 86 |
Execution timed out |
1050 ms |
57460 KB |
Time limit exceeded |
| 87 |
Execution timed out |
1056 ms |
57484 KB |
Time limit exceeded |
| 88 |
Execution timed out |
1075 ms |
57320 KB |
Time limit exceeded |
| 89 |
Execution timed out |
1057 ms |
57460 KB |
Time limit exceeded |
| 90 |
Execution timed out |
1029 ms |
50464 KB |
Time limit exceeded |
| 91 |
Execution timed out |
1099 ms |
57680 KB |
Time limit exceeded |
| 92 |
Execution timed out |
1060 ms |
57472 KB |
Time limit exceeded |
| 93 |
Execution timed out |
1020 ms |
57760 KB |
Time limit exceeded |
| 94 |
Execution timed out |
1086 ms |
57500 KB |
Time limit exceeded |
| 95 |
Execution timed out |
1046 ms |
57696 KB |
Time limit exceeded |
| 96 |
Execution timed out |
1085 ms |
57364 KB |
Time limit exceeded |
| 97 |
Correct |
981 ms |
57832 KB |
Output is correct |
| 98 |
Execution timed out |
1069 ms |
57496 KB |
Time limit exceeded |
| 99 |
Execution timed out |
1037 ms |
57492 KB |
Time limit exceeded |
| 100 |
Execution timed out |
1049 ms |
57464 KB |
Time limit exceeded |
