oj.uz

Submission #102494

# Submission time Handle Problem Language Result Execution time Memory
102494 2019-03-25T11:24:29 Z alexpetrescu Designated Cities (JOI19_designated_cities) C++14
16 / 100
 505 ms 31324 KB 
#include <cstdio>
#include <vector>
#include <algorithm>

//FILE *fin = fopen("a.in", "r"), *fout = fopen("a.out", "w");
#define fin stdin
#define fout stdout

#define ll long long

#define MAXN 200009

struct myc {
    int x, y, z;
};

std::vector < myc > g[MAXN];
ll ans[MAXN], sumaTuturor;
int e[MAXN], desteptu[MAXN], istetu[MAXN];
bool viz[MAXN], luat[MAXN];
ll sum[MAXN], calc[MAXN], h[MAXN];
int A, B, C;

void dfs1(int x) {
    viz[x] = 1;
    for (auto &y : g[x]) {
        if (viz[y.x] == 0) {
            dfs1(y.x);
            sum[x] += sum[y.x] + y.z;
        }
    }
}

void dfs2(int x, ll dinSpate) {
    viz[x] = 1;
    calc[x] = sum[x] + dinSpate;
    ans[1] = std::min(ans[1], sumaTuturor - calc[x]);
    desteptu[x] = x;
    for (auto &y : g[x]) {
        if (viz[y.x] == 0) {
            h[y.x] = h[x] + y.y;
            dfs2(y.x, dinSpate + sum[x] - sum[y.x] - y.z + y.y);
            if (h[desteptu[y.x]] > h[desteptu[x]]) {
                istetu[x] = desteptu[x];
                desteptu[x] = desteptu[y.x];
            } else if (h[desteptu[y.x]] > h[istetu[x]])
                istetu[x] = desteptu[y.x];
        }
    }
    if (h[desteptu[x]] + h[istetu[x]] - h[x] + calc[x] > h[A] + h[B] - h[C] + calc[C])
        A = desteptu[x], B = istetu[x], C = x;
}

void dfs3(int x) {
    viz[x] = 1;
    bool frunza = 1;
    for (auto &y : g[x]) {
        if (viz[y.x] == 0) {
            frunza = 0;
            h[y.x] = h[x] + y.y;
            dfs3(y.x);
            luat[x] |= luat[y.x];
            if (luat[y.x] == 0)
                ans[2] += y.y;
        }
    }
    if(frunza)
        e[++e[0]] = x;
}

inline void solve(int n) {
    int rad = 0;
    for (int i = 1; i <= n; i++)
        if ((int)g[i].size() != 1)
            rad = i;
    ans[1] = sumaTuturor;
    dfs1(rad);
    for (int i = 1; i <= n; i++)
        viz[i] = 0;
    h[0] = -1000000000000000000LL;
    dfs2(rad, 0);
    for (int i = 1; i <= n; i++)
        viz[i] = 0;
    luat[A] = luat[B] = 1;
    h[C] = 0;
    dfs3(C);
}

int main() {
    int n;
    fscanf(fin, "%d", &n);

    for (int i = 1; i < n; i++) {
        int x, y, z, t;
        fscanf(fin, "%d%d%d%d", &x, &y, &z, &t);

        g[x].push_back({y, z, t});
        g[y].push_back({x, t, z});

        sumaTuturor += z + t;
        ans[1] = std::min(z, t);
    }

    if (n > 2)
        solve(n);

    int q;
    fscanf(fin, "%d", &q);

    for (; q; q--) {
        int x;
        fscanf(fin, "%d", &x);

        fprintf(fout, "%lld\n", ans[x]);
    }

    fclose(fin);
    fclose(fout);
    return 0;
}

Compilation message

designated_cities.cpp: In function 'int main()':
designated_cities.cpp:91:11: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     fscanf(fin, "%d", &n);
     ~~~~~~^~~~~~~~~~~~~~~
designated_cities.cpp:95:15: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         fscanf(fin, "%d%d%d%d", &x, &y, &z, &t);
         ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
designated_cities.cpp:108:11: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     fscanf(fin, "%d", &q);
     ~~~~~~^~~~~~~~~~~~~~~
designated_cities.cpp:112:15: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         fscanf(fin, "%d", &x);
         ~~~~~~^~~~~~~~~~~~~~~

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 4992 KB Output is correct
2 Incorrect 6 ms 5120 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 456 ms 20216 KB Output is correct
3 Correct 456 ms 23168 KB Output is correct
4 Correct 386 ms 20216 KB Output is correct
5 Correct 376 ms 20396 KB Output is correct
6 Correct 401 ms 21240 KB Output is correct
7 Correct 342 ms 20220 KB Output is correct
8 Correct 456 ms 24588 KB Output is correct
9 Correct 266 ms 18592 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 4992 KB Output is correct
2 Correct 425 ms 20220 KB Output is correct
3 Correct 463 ms 29304 KB Output is correct
4 Correct 390 ms 25208 KB Output is correct
5 Correct 386 ms 26652 KB Output is correct
6 Correct 399 ms 27640 KB Output is correct
7 Correct 303 ms 27192 KB Output is correct
8 Correct 505 ms 31324 KB Output is correct
9 Correct 264 ms 24752 KB Output is correct

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 4992 KB Output is correct
2 Incorrect 6 ms 5120 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 4992 KB Output is correct
2 Correct 456 ms 20216 KB Output is correct
3 Correct 456 ms 23168 KB Output is correct
4 Correct 386 ms 20216 KB Output is correct
5 Correct 376 ms 20396 KB Output is correct
6 Correct 401 ms 21240 KB Output is correct
7 Correct 342 ms 20220 KB Output is correct
8 Correct 456 ms 24588 KB Output is correct
9 Correct 266 ms 18592 KB Output is correct
10 Correct 6 ms 4992 KB Output is correct
11 Correct 425 ms 20220 KB Output is correct
12 Correct 463 ms 29304 KB Output is correct
13 Correct 390 ms 25208 KB Output is correct
14 Correct 386 ms 26652 KB Output is correct
15 Correct 399 ms 27640 KB Output is correct
16 Correct 303 ms 27192 KB Output is correct
17 Correct 505 ms 31324 KB Output is correct
18 Correct 264 ms 24752 KB Output is correct
19 Correct 7 ms 4992 KB Output is correct
20 Incorrect 417 ms 26716 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 4992 KB Output is correct
2 Incorrect 6 ms 5120 KB Output isn't correct
3 Halted 0 ms 0 KB -