oj.uz

Submission #1037072

# Submission time Handle Problem Language Result Execution time Memory
1037072 2024-07-28T02:41:56 Z RiverFlow Towers (NOI22_towers) C++14
5 / 100
 2000 ms 106324 KB 
#include <bits/stdc++.h>

#define nl "\n"
#define no "NO"
#define yes "YES"
#define fi first
#define se second
#define vec vector
#define task "main"
#define _mp make_pair
#define ii pair<int, int>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define evoid(val) return void(std::cout << val)
#define FOR(i, a, b) for(int i = (a); i <= (b); ++i)
#define FOD(i, b, a) for(int i = (b); i >= (a); --i)
#define unq(x) sort(all(x)); x.resize(unique(all(x)) - x.begin())

using namespace std;

template<typename U, typename V> bool maxi(U &a, V b) {
    if (a < b) { a = b; return 1; } return 0;
}
template<typename U, typename V> bool mini(U &a, V b) {
    if (a > b) { a = b; return 1; } return 0;
}

const int N = (int)1e6 + 9;
const int mod = (int)1e9 + 7;

void prepare(); void main_code();

int main() {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    const bool MULTITEST = 0; prepare();
    int num_test = 1; if (MULTITEST) cin >> num_test;
    while (num_test--) { main_code(); }
}

void prepare() {};

struct vx {
    int x, y, i;
    bool operator < (const vx & other) {
        return x<other.x or (x==other.x and y<other.y);
    }
};
vx a[N];

int n;
int p = -1;
bool f(int x, int y) {
    int lb = 1, rb = n;
    while (lb <= rb) {
        int mid = (lb + rb) >> 1;
        if (a[mid].x==x and a[mid].y==y){
            p=mid;return 1;
        }
        if (a[mid].x < x or (a[mid].x == x and a[mid].y < y)) {
            lb = mid + 1;
        } else {
            rb = mid - 1;
        }
    }
    return 0;
}

int cntx[N], cnty[N], res[N];

bool vis[N];

void main_code() {
    cin >> n;
    for(int i = 1; i <= n; ++i) {
        cin >> a[i].x >> a[i].y; a[i].i=i;
    }
    sort(a + 1, a + n + 1);

    multiset<int> minx, miny;
    FOR(i, 1, n) {
        minx.insert(a[i].x);
        miny.insert(a[i].y);
    }
    while (sz(minx)) {
        int L = *minx.begin();
        int R = *minx.rbegin();
        int U = *miny.rbegin();
        int V = *miny.begin();

        if (f(L, U)) {
            if (vis[p])continue;
            if (cntx[a[p].x] < 2 and cnty[a[p].y] < 2) {
                ++cntx[a[p].x], ++cnty[a[p].y];
                res[a[p].i]=1;
            }
            vis[p]=1;
            minx.erase(minx.find(a[p].x));
            miny.erase(miny.find(a[p].y));
        }
        if (L != R and f(R, U)) {
            if (vis[p])continue;
            if (cntx[a[p].x] < 2 and cnty[a[p].y] < 2) {
                ++cntx[a[p].x], ++cnty[a[p].y];
                res[a[p].i]=1;
            }
            vis[p]=1;
            minx.erase(minx.find(a[p].x));
            miny.erase(miny.find(a[p].y));
        }
        if (U != V and f(L, V)) {
            if (vis[p])continue;
            if (cntx[a[p].x] < 2 and cnty[a[p].y] < 2) {
                ++cntx[a[p].x], ++cnty[a[p].y];
                res[a[p].i]=1;
            }
            vis[p]=1;
            minx.erase(minx.find(a[p].x));
            miny.erase(miny.find(a[p].y));
        }
        if (U != V and L != R and f(R, V)) {
            if (vis[p])continue;
            if (cntx[a[p].x] < 2 and cnty[a[p].y] < 2) {
                ++cntx[a[p].x], ++cnty[a[p].y];
                res[a[p].i]=1;
            }
            vis[p]=1;
            minx.erase(minx.find(a[p].x));
            miny.erase(miny.find(a[p].y));
        }
/*
    U
 L     R
    V
*/
    }
    FOR(i, 1, n) cout << res[i];

}


/*     Let the river flows naturally     */

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:36:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:37:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   37 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 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 1 ms 4444 KB Output is correct
4 Correct 1 ms 4440 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 0 ms 4444 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4440 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct

Subtask #2
0 / 11.0

# 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 1 ms 4444 KB Output is correct
4 Correct 1 ms 4440 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 0 ms 4444 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4440 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Execution timed out 2031 ms 4440 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2061 ms 13140 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 6.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2070 ms 106324 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 31.0

# 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 1 ms 4444 KB Output is correct
4 Correct 1 ms 4440 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 0 ms 4444 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4440 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Execution timed out 2031 ms 4440 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #6
0 / 21.0

# 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 1 ms 4444 KB Output is correct
4 Correct 1 ms 4440 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 0 ms 4444 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4440 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Execution timed out 2031 ms 4440 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #7
0 / 19.0

# 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 1 ms 4444 KB Output is correct
4 Correct 1 ms 4440 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 0 ms 4444 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4440 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Execution timed out 2031 ms 4440 KB Time limit exceeded
12 Halted 0 ms 0 KB -