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Submission #1005874

# Submission time Handle Problem Language Result Execution time Memory
1005874 2024-06-23T07:24:54 Z sleepntsheep Construction Project 2 (JOI24_ho_t2) C
100 / 100
 195 ms 16728 KB 
#include <stdio.h>

#define NN 200000
#define MM 200000

int n, m, l, src, dst, nxt[MM*2+1], hed[NN], cst[MM*2+1], to[MM*2+1];
long long k, dp[NN], dsrc[NN], ddst[NN], answer;
const long long oo = 1e18;

void lnk(int u, int v, int w) {
    static int ii = 1, i;
    i = ii++;
    cst[i] = w;
    to[i] = v;
    nxt[i] = hed[u];
    hed[u] = i;
}

int tt[NN<<1];
int (*min)(int, int);

int mindijk(int i, int j) {
    return dp[i] < dp[j] ? i : j;
}

int minddst(int i, int j) {
    return ddst[i] < ddst[j] ? i : j;
}

void pul(int i) {
    tt[i] = min(tt[i << 1], tt[i << 1 | 1]);
}

void fix(int i) {
    for (i += n; i >>= 1;)
        pul(i);
}

void dijkstra(int src, long long *out) {
    int i;
    for (i = 0; i < n; ++i)
        dp[i] = oo, tt[i + n] = i;
    dp[src] = 0;
    for (i = n; --i;)
        pul(i);

    for (i = 0; i < n; ++i) {
        int u, j;
        u = tt[1];
        out[u] = dp[u];
        dp[u] = oo + 1;
        fix(u);

        for (j = hed[u]; j; j = nxt[j]) {
            int v, w;
            v = to[j], w = cst[j];
            if (dp[v] == oo + 1)
                continue;
            if (dp[v] > out[u] + w)
                dp[v] = out[u] + w, fix(v);
        }
    }
}

int main() {
    int i, a, b, c;

    scanf("%d%d%d%d%d%lld", &n, &m, &src, &dst, &l, &k);
    --src, --dst;
    for (i = 0; i < m; ++i)
        scanf("%d%d%d", &a, &b, &c), lnk(--a, --b, c), lnk(b, a, c);

    min = mindijk;
    dijkstra(src, dsrc);

    if (dsrc[dst] <= k) {
        printf("%lld", n * (n - 1ll) / 2);
        return 0;
    }

    dijkstra(dst, ddst);

    min = minddst;
    for (i = 0; i < n; ++i)
        tt[i + n] = i;
    for (i = n; --i;)
        pul(i);

    for (i = 0; i < n; ++i) {
        dp[i] = ddst[tt[1]];
        ddst[tt[1]] = oo + 1;
        fix(tt[1]);
    }

    for (i = 0; i < n; ++i) {
        int lower, upper, mid;
        lower = -1;
        upper = n;
        while (upper - lower > 1) {
            mid = lower + (upper - lower) / 2;
            if (l + dp[mid] + dsrc[i] <= k)
                lower = mid;
            else
                upper = mid;
        }
        answer += lower + 1;
    }
    printf("%lld", answer);
}

Compilation message

Main.c: In function 'main':
Main.c:68:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |     scanf("%d%d%d%d%d%lld", &n, &m, &src, &dst, &l, &k);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.c:71:9: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |         scanf("%d%d%d", &a, &b, &c), lnk(--a, --b, c), lnk(b, a, c);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8540 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 2 ms 8540 KB Output is correct
6 Correct 2 ms 8536 KB Output is correct
7 Correct 103 ms 14076 KB Output is correct
8 Correct 112 ms 14204 KB Output is correct
9 Correct 55 ms 13916 KB Output is correct
10 Correct 1 ms 8540 KB Output is correct
11 Correct 1 ms 8540 KB Output is correct
12 Correct 2 ms 8636 KB Output is correct
13 Correct 2 ms 8540 KB Output is correct
14 Correct 84 ms 12676 KB Output is correct
15 Correct 134 ms 15184 KB Output is correct
16 Correct 1 ms 8540 KB Output is correct
17 Correct 2 ms 8540 KB Output is correct
18 Correct 120 ms 14928 KB Output is correct
19 Correct 1 ms 8540 KB Output is correct
20 Correct 1 ms 8540 KB Output is correct
21 Correct 2 ms 8636 KB Output is correct
22 Correct 2 ms 8540 KB Output is correct
23 Correct 85 ms 12720 KB Output is correct
24 Correct 134 ms 14928 KB Output is correct
25 Correct 1 ms 8540 KB Output is correct
26 Correct 1 ms 8540 KB Output is correct
27 Correct 61 ms 14916 KB Output is correct
28 Correct 92 ms 13652 KB Output is correct
29 Correct 92 ms 14416 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8540 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 1 ms 8536 KB Output is correct
8 Correct 1 ms 8536 KB Output is correct
9 Correct 1 ms 8540 KB Output is correct
10 Correct 1 ms 8540 KB Output is correct
11 Correct 1 ms 8540 KB Output is correct
12 Correct 1 ms 8540 KB Output is correct
13 Correct 1 ms 8540 KB Output is correct
14 Correct 1 ms 8540 KB Output is correct
15 Correct 1 ms 8564 KB Output is correct
16 Correct 1 ms 8540 KB Output is correct
17 Correct 1 ms 8540 KB Output is correct
18 Correct 1 ms 8540 KB Output is correct
19 Correct 1 ms 8540 KB Output is correct
20 Correct 1 ms 8540 KB Output is correct
21 Correct 1 ms 8540 KB Output is correct
22 Correct 1 ms 8540 KB Output is correct
23 Correct 1 ms 8540 KB Output is correct
24 Correct 1 ms 8540 KB Output is correct
25 Correct 1 ms 8540 KB Output is correct
26 Correct 1 ms 8540 KB Output is correct
27 Correct 1 ms 8620 KB Output is correct
28 Correct 1 ms 8540 KB Output is correct
29 Correct 1 ms 8536 KB Output is correct
30 Correct 1 ms 8540 KB Output is correct
31 Correct 1 ms 8628 KB Output is correct
32 Correct 1 ms 8540 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8540 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 1 ms 8540 KB Output is correct
6 Correct 1 ms 8540 KB Output is correct
7 Correct 1 ms 8536 KB Output is correct
8 Correct 1 ms 8536 KB Output is correct
9 Correct 1 ms 8540 KB Output is correct
10 Correct 1 ms 8540 KB Output is correct
11 Correct 1 ms 8540 KB Output is correct
12 Correct 1 ms 8540 KB Output is correct
13 Correct 1 ms 8540 KB Output is correct
14 Correct 1 ms 8540 KB Output is correct
15 Correct 1 ms 8564 KB Output is correct
16 Correct 1 ms 8540 KB Output is correct
17 Correct 1 ms 8540 KB Output is correct
18 Correct 1 ms 8540 KB Output is correct
19 Correct 1 ms 8540 KB Output is correct
20 Correct 1 ms 8540 KB Output is correct
21 Correct 1 ms 8540 KB Output is correct
22 Correct 1 ms 8540 KB Output is correct
23 Correct 1 ms 8540 KB Output is correct
24 Correct 1 ms 8540 KB Output is correct
25 Correct 1 ms 8540 KB Output is correct
26 Correct 1 ms 8540 KB Output is correct
27 Correct 1 ms 8620 KB Output is correct
28 Correct 1 ms 8540 KB Output is correct
29 Correct 1 ms 8536 KB Output is correct
30 Correct 1 ms 8540 KB Output is correct
31 Correct 1 ms 8628 KB Output is correct
32 Correct 1 ms 8540 KB Output is correct
33 Correct 2 ms 8536 KB Output is correct
34 Correct 1 ms 8540 KB Output is correct
35 Correct 2 ms 8540 KB Output is correct
36 Correct 2 ms 8696 KB Output is correct
37 Correct 2 ms 8740 KB Output is correct
38 Correct 2 ms 8540 KB Output is correct
39 Correct 2 ms 8536 KB Output is correct
40 Correct 2 ms 8536 KB Output is correct
41 Correct 1 ms 8540 KB Output is correct
42 Correct 2 ms 8536 KB Output is correct
43 Correct 2 ms 8536 KB Output is correct
44 Correct 3 ms 8632 KB Output is correct
45 Correct 2 ms 8632 KB Output is correct
46 Correct 2 ms 8536 KB Output is correct
47 Correct 2 ms 8540 KB Output is correct
48 Correct 2 ms 8540 KB Output is correct
49 Correct 1 ms 8540 KB Output is correct
50 Correct 2 ms 8700 KB Output is correct
51 Correct 3 ms 8536 KB Output is correct
52 Correct 2 ms 8540 KB Output is correct
53 Correct 2 ms 8540 KB Output is correct
54 Correct 2 ms 8540 KB Output is correct
55 Correct 2 ms 8540 KB Output is correct
56 Correct 2 ms 8540 KB Output is correct
57 Correct 2 ms 8540 KB Output is correct
58 Correct 2 ms 8540 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 8540 KB Output is correct
2 Correct 1 ms 8540 KB Output is correct
3 Correct 1 ms 8540 KB Output is correct
4 Correct 1 ms 8540 KB Output is correct
5 Correct 2 ms 8540 KB Output is correct
6 Correct 2 ms 8536 KB Output is correct
7 Correct 103 ms 14076 KB Output is correct
8 Correct 112 ms 14204 KB Output is correct
9 Correct 55 ms 13916 KB Output is correct
10 Correct 1 ms 8540 KB Output is correct
11 Correct 1 ms 8540 KB Output is correct
12 Correct 2 ms 8636 KB Output is correct
13 Correct 2 ms 8540 KB Output is correct
14 Correct 84 ms 12676 KB Output is correct
15 Correct 134 ms 15184 KB Output is correct
16 Correct 1 ms 8540 KB Output is correct
17 Correct 2 ms 8540 KB Output is correct
18 Correct 120 ms 14928 KB Output is correct
19 Correct 1 ms 8540 KB Output is correct
20 Correct 1 ms 8540 KB Output is correct
21 Correct 2 ms 8636 KB Output is correct
22 Correct 2 ms 8540 KB Output is correct
23 Correct 85 ms 12720 KB Output is correct
24 Correct 134 ms 14928 KB Output is correct
25 Correct 1 ms 8540 KB Output is correct
26 Correct 1 ms 8540 KB Output is correct
27 Correct 61 ms 14916 KB Output is correct
28 Correct 92 ms 13652 KB Output is correct
29 Correct 92 ms 14416 KB Output is correct
30 Correct 1 ms 8540 KB Output is correct
31 Correct 1 ms 8540 KB Output is correct
32 Correct 1 ms 8540 KB Output is correct
33 Correct 1 ms 8540 KB Output is correct
34 Correct 1 ms 8540 KB Output is correct
35 Correct 1 ms 8540 KB Output is correct
36 Correct 1 ms 8536 KB Output is correct
37 Correct 1 ms 8536 KB Output is correct
38 Correct 1 ms 8540 KB Output is correct
39 Correct 1 ms 8540 KB Output is correct
40 Correct 1 ms 8540 KB Output is correct
41 Correct 1 ms 8540 KB Output is correct
42 Correct 1 ms 8540 KB Output is correct
43 Correct 1 ms 8540 KB Output is correct
44 Correct 1 ms 8564 KB Output is correct
45 Correct 1 ms 8540 KB Output is correct
46 Correct 1 ms 8540 KB Output is correct
47 Correct 1 ms 8540 KB Output is correct
48 Correct 1 ms 8540 KB Output is correct
49 Correct 1 ms 8540 KB Output is correct
50 Correct 1 ms 8540 KB Output is correct
51 Correct 1 ms 8540 KB Output is correct
52 Correct 1 ms 8540 KB Output is correct
53 Correct 1 ms 8540 KB Output is correct
54 Correct 1 ms 8540 KB Output is correct
55 Correct 1 ms 8540 KB Output is correct
56 Correct 1 ms 8620 KB Output is correct
57 Correct 1 ms 8540 KB Output is correct
58 Correct 1 ms 8536 KB Output is correct
59 Correct 1 ms 8540 KB Output is correct
60 Correct 1 ms 8628 KB Output is correct
61 Correct 1 ms 8540 KB Output is correct
62 Correct 2 ms 8536 KB Output is correct
63 Correct 1 ms 8540 KB Output is correct
64 Correct 2 ms 8540 KB Output is correct
65 Correct 2 ms 8696 KB Output is correct
66 Correct 2 ms 8740 KB Output is correct
67 Correct 2 ms 8540 KB Output is correct
68 Correct 2 ms 8536 KB Output is correct
69 Correct 2 ms 8536 KB Output is correct
70 Correct 1 ms 8540 KB Output is correct
71 Correct 2 ms 8536 KB Output is correct
72 Correct 2 ms 8536 KB Output is correct
73 Correct 3 ms 8632 KB Output is correct
74 Correct 2 ms 8632 KB Output is correct
75 Correct 2 ms 8536 KB Output is correct
76 Correct 2 ms 8540 KB Output is correct
77 Correct 2 ms 8540 KB Output is correct
78 Correct 1 ms 8540 KB Output is correct
79 Correct 2 ms 8700 KB Output is correct
80 Correct 3 ms 8536 KB Output is correct
81 Correct 2 ms 8540 KB Output is correct
82 Correct 2 ms 8540 KB Output is correct
83 Correct 2 ms 8540 KB Output is correct
84 Correct 2 ms 8540 KB Output is correct
85 Correct 2 ms 8540 KB Output is correct
86 Correct 2 ms 8540 KB Output is correct
87 Correct 2 ms 8540 KB Output is correct
88 Correct 80 ms 16728 KB Output is correct
89 Correct 75 ms 16724 KB Output is correct
90 Correct 119 ms 16724 KB Output is correct
91 Correct 40 ms 13612 KB Output is correct
92 Correct 46 ms 13528 KB Output is correct
93 Correct 88 ms 13392 KB Output is correct
94 Correct 90 ms 13500 KB Output is correct
95 Correct 161 ms 16592 KB Output is correct
96 Correct 77 ms 16408 KB Output is correct
97 Correct 195 ms 16468 KB Output is correct
98 Correct 161 ms 16468 KB Output is correct
99 Correct 119 ms 16468 KB Output is correct
100 Correct 123 ms 16464 KB Output is correct
101 Correct 50 ms 13644 KB Output is correct
102 Correct 49 ms 13652 KB Output is correct
103 Correct 88 ms 13400 KB Output is correct
104 Correct 88 ms 13396 KB Output is correct
105 Correct 162 ms 16468 KB Output is correct
106 Correct 165 ms 16588 KB Output is correct
107 Correct 136 ms 16472 KB Output is correct
108 Correct 138 ms 16468 KB Output is correct
109 Correct 82 ms 14928 KB Output is correct
110 Correct 80 ms 14752 KB Output is correct
111 Correct 96 ms 14672 KB Output is correct
112 Correct 92 ms 14672 KB Output is correct