oj.uz

Submission #541399

# Submission time Handle Problem Language Result Execution time Memory
541399 2022-03-23T13:17:22 Z nigus Bomb (IZhO17_bomb) C++14
33 / 100
 1000 ms 57932 KB 
#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define per(i, b, a) for(int i = b - 1; i >= a; i--)
#define trav(a, x) for(auto& a : x)
#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef long double ld;
typedef unsigned long long ull;

unsigned seed = chrono::system_clock::now().time_since_epoch().count();
mt19937 eng(seed);

ll random2(){
    return (1ll << 31ll)*eng()+eng();
}

ll n,m,k,q,T;

const ll big = 1000000007;
const ll big2 = 1000000009;
const ll mod =  998244353;

const int MAXN = 2501;

bool grid[MAXN][MAXN] = {0};

bool covered[MAXN][MAXN] = {0};

bool can_place(int i, int j, int a, int b){
    if(n-i < a || m-j < b)return 0;
    rep(c1,0,a){
        rep(c2,0,b){
            if(!grid[i+c1][j+c2])return 0;
        }
    }
    return 1;
}

bool can_cover(int i, int j, int a, int b){
    rep(dx,0,a){
        rep(dy,0,b){
            int i2 = i - dx;
            int j2 = j - dy;
            if(i2 >= 0 && j2 >= 0 && can_place(i2,j2,a,b))return 1;
        }
    }
    return 0;
}

bool solve(int a, int b){
    rep(c1,0,n){
        rep(c2,0,m){
            if(grid[c1][c2] && (c1 == n-1 || !grid[c1+1][c2] || c1 == 0 || !grid[c1-1][c2]) && !can_cover(c1,c2,a,b))return 0;
        }
    }
    return 1;
}

int lft[MAXN][MAXN] = {0};
int up[MAXN][MAXN] = {0};

int mina = big;
int minb = big;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

   // freopen("fhc.txt","r",stdin);
   // freopen("autput.txt","w",stdout);

    ll a,b,c,d,e;

    cin >> n >> m;
    rep(c1,0,n){
        string s;
        cin >> s;
        rep(c2,0,m){
            grid[c1][c2] = (s[c2] == '1');
        }
    }

    rep(c1,0,n){
        rep(c2,0,m){
            if(grid[c1][c2]){
                if(c1 == 0){
                    up[c1][c2] = 1;
                }
                else{
                    up[c1][c2] = up[c1-1][c2]+1;
                }

                if(c1 == n-1 || !grid[c1+1][c2])mina = min(mina, up[c1][c2]);

                if(c2 == 0){
                    lft[c1][c2] = 1;
                }
                else{
                    lft[c1][c2] = lft[c1][c2-1]+1;
                }

                if(c2 == m-1 || !grid[c1][c2+1])minb = min(minb, lft[c1][c2]);
            }
        }
    }

    ll ans = 0;

    rep(a,1,mina+1){
        rep(b,1,minb+1){
            if(solve(a, b)){
                ans = max(ans, (ll)a*b);
            }
        }
    }
    cout << ans << "\n";


    return 0;
}

Compilation message

bomb.cpp: In function 'int main()':
bomb.cpp:79:8: warning: unused variable 'a' [-Wunused-variable]
   79 |     ll a,b,c,d,e;
      |        ^
bomb.cpp:79:10: warning: unused variable 'b' [-Wunused-variable]
   79 |     ll a,b,c,d,e;
      |          ^
bomb.cpp:79:12: warning: unused variable 'c' [-Wunused-variable]
   79 |     ll a,b,c,d,e;
      |            ^
bomb.cpp:79:14: warning: unused variable 'd' [-Wunused-variable]
   79 |     ll a,b,c,d,e;
      |              ^
bomb.cpp:79:16: warning: unused variable 'e' [-Wunused-variable]
   79 |     ll a,b,c,d,e;
      |                ^

Subtask #1
33.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 12 ms 26516 KB Output is correct
4 Correct 11 ms 26404 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 468 KB Output is correct
11 Correct 1 ms 468 KB Output is correct
12 Correct 1 ms 468 KB Output is correct
13 Correct 1 ms 468 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 1 ms 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 1 ms 976 KB Output is correct
18 Correct 1 ms 724 KB Output is correct
19 Correct 2 ms 980 KB Output is correct
20 Correct 3 ms 980 KB Output is correct
21 Correct 1 ms 596 KB Output is correct
22 Correct 1 ms 724 KB Output is correct
23 Correct 66 ms 980 KB Output is correct
24 Correct 5 ms 980 KB Output is correct
25 Correct 73 ms 1336 KB Output is correct
26 Correct 9 ms 1364 KB Output is correct
27 Correct 3 ms 4052 KB Output is correct
28 Correct 7 ms 1568 KB Output is correct
29 Execution timed out 1073 ms 5204 KB Time limit exceeded
30 Execution timed out 1080 ms 4308 KB Time limit exceeded
31 Execution timed out 1086 ms 3156 KB Time limit exceeded
32 Execution timed out 1047 ms 4180 KB Time limit exceeded
33 Execution timed out 1076 ms 5332 KB Time limit exceeded
34 Correct 7 ms 1748 KB Output is correct
35 Execution timed out 1077 ms 2140 KB Time limit exceeded
36 Execution timed out 1078 ms 6744 KB Time limit exceeded
37 Correct 1 ms 468 KB Output is correct
38 Execution timed out 1027 ms 57872 KB Time limit exceeded
39 Correct 1 ms 468 KB Output is correct
40 Execution timed out 1091 ms 16212 KB Time limit exceeded
41 Correct 1 ms 468 KB Output is correct
42 Execution timed out 1086 ms 1364 KB Time limit exceeded
43 Execution timed out 1028 ms 53940 KB Time limit exceeded
44 Execution timed out 1085 ms 6228 KB Time limit exceeded
45 Execution timed out 1010 ms 55576 KB Time limit exceeded
46 Execution timed out 1012 ms 57772 KB Time limit exceeded
47 Execution timed out 1027 ms 55364 KB Time limit exceeded
48 Execution timed out 1022 ms 57824 KB Time limit exceeded
49 Correct 391 ms 57932 KB Output is correct
50 Execution timed out 1016 ms 57804 KB Time limit exceeded
51 Execution timed out 1029 ms 57804 KB Time limit exceeded
52 Execution timed out 1096 ms 57744 KB Time limit exceeded
53 Execution timed out 1016 ms 57164 KB Time limit exceeded
54 Execution timed out 1033 ms 44548 KB Time limit exceeded
55 Execution timed out 1074 ms 42820 KB Time limit exceeded
56 Execution timed out 1027 ms 57756 KB Time limit exceeded
57 Execution timed out 1045 ms 37728 KB Time limit exceeded
58 Execution timed out 1029 ms 42576 KB Time limit exceeded
59 Execution timed out 1054 ms 39456 KB Time limit exceeded
60 Execution timed out 1077 ms 49312 KB Time limit exceeded
61 Execution timed out 1085 ms 57480 KB Time limit exceeded
62 Execution timed out 1042 ms 57392 KB Time limit exceeded
63 Execution timed out 1096 ms 57380 KB Time limit exceeded
64 Execution timed out 1047 ms 40268 KB Time limit exceeded
65 Execution timed out 1046 ms 56388 KB Time limit exceeded
66 Execution timed out 1094 ms 53304 KB Time limit exceeded
67 Execution timed out 1101 ms 57492 KB Time limit exceeded
68 Execution timed out 1105 ms 57632 KB Time limit exceeded
69 Execution timed out 1034 ms 37196 KB Time limit exceeded
70 Execution timed out 1095 ms 17356 KB Time limit exceeded
71 Execution timed out 1048 ms 30284 KB Time limit exceeded
72 Execution timed out 1066 ms 35700 KB Time limit exceeded
73 Execution timed out 1100 ms 36172 KB Time limit exceeded
74 Execution timed out 1012 ms 37708 KB Time limit exceeded
75 Execution timed out 1091 ms 39404 KB Time limit exceeded
76 Execution timed out 1080 ms 40676 KB Time limit exceeded
77 Execution timed out 1085 ms 41016 KB Time limit exceeded
78 Execution timed out 1058 ms 41036 KB Time limit exceeded
79 Execution timed out 1073 ms 13664 KB Time limit exceeded
80 Execution timed out 1029 ms 14880 KB Time limit exceeded
81 Execution timed out 1102 ms 15176 KB Time limit exceeded
82 Execution timed out 1030 ms 43576 KB Time limit exceeded
83 Execution timed out 1087 ms 43788 KB Time limit exceeded
84 Execution timed out 1086 ms 8808 KB Time limit exceeded
85 Execution timed out 1102 ms 42700 KB Time limit exceeded
86 Execution timed out 1087 ms 56048 KB Time limit exceeded
87 Execution timed out 1028 ms 41164 KB Time limit exceeded
88 Execution timed out 1090 ms 42008 KB Time limit exceeded
89 Execution timed out 1022 ms 50756 KB Time limit exceeded
90 Execution timed out 1034 ms 31152 KB Time limit exceeded
91 Execution timed out 1028 ms 46292 KB Time limit exceeded
92 Execution timed out 1025 ms 47948 KB Time limit exceeded
93 Execution timed out 1087 ms 55008 KB Time limit exceeded
94 Execution timed out 1029 ms 49744 KB Time limit exceeded
95 Execution timed out 1047 ms 43736 KB Time limit exceeded
96 Execution timed out 1036 ms 43256 KB Time limit exceeded
97 Execution timed out 1012 ms 55796 KB Time limit exceeded
98 Execution timed out 1022 ms 43104 KB Time limit exceeded
99 Execution timed out 1026 ms 49312 KB Time limit exceeded
100 Execution timed out 1016 ms 54436 KB Time limit exceeded