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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#352482 | #7995. 图 | lopzith | RE | 1ms | 4840kb | C++14 | 2.9kb | 2024-03-13 11:29:21 | 2024-03-13 11:29:21 |
Judging History
answer
#pragma GCC optimize(3)
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#define i64 long long
#define ull unsigned long long
#define Arr std::vector
#define Ptn std::pair
#define fi first
#define se second
#define eb emplace_back
#define pb push_back
#define popc(x) __builtin_popcount(x)
#define FILE(x) freopen(x ".in", "r", stdin), freopen(x ".out", "w", stdout)
#define TEST(x) freopen(x ".in", "r", stdin), freopen("test.out", "w", stdout)
#define debug std::cout << "Running on " << __FUNCTION__ << ' ' << __LINE__ << std::endl;
const int INF = 0x3f3f3f3f;
const int N = 505;
int n, a[N][N], w[N][N], dep[N], fa[N], ans[N][N], op[N][N]; // op 0 -> isTrue
Arr<int> e[N];
Arr< Ptn<int, int> > ret;
inline int read()
{
int w = 0, f = 1;
char ch = getchar();
while (ch < '0' || ch > '9')
{
if (ch == '-') f = -1;
ch = getchar();
}
while (ch >= '0' && ch <= '9')
{
w = (w << 3) + (w << 1) + (ch - 48);
ch = getchar();
}
return w * f;
}
void DFS(int p)
{
Ptn<int, int> opt = {INF, 0};
for (auto tt : e[p])
{
if (fa[p] == tt) continue;
if (dep[tt])
{
op[tt][p] = op[p][tt] = 1;
opt = std::min(opt, {dep[tt], tt});
continue;
}
fa[tt] = p;
dep[tt] = dep[p] + 1;
DFS(tt);
}
if (opt.se)
{
int now = p, cnt = 0;
while (now != opt.se)
{
op[now][fa[now]] = 1, op[fa[now]][now] = 1;
cnt++;
if (cnt >= n + 5) printf("%d %d\n", now, p);
assert(cnt <= n + 5);
// printf("%lld %lld\n", now, fa[now]);
now = fa[now];
}
}
}
signed main()
{
n = read(); for (int i = 1; i <= n; i++) for (int j = 1; j <= n; j++) w[i][j] = a[i][j] = read();
for (int k = 1; k <= n; k++)
{
for (int i = 1; i <= n; i++)
{
for (int j = 1; j <= n; j++)
{
a[i][j] = std::min(a[i][j], a[i][k] + a[k][j]);
}
}
}
for (int s = 1; s <= n; s++)
{
for (int i = 1; i <= n; i++) e[i].clear(); memset(op, 0, sizeof(op));
ret.clear();
memset(dep, 0, sizeof(dep)); memset(fa, 0, sizeof(fa));
for (int i = 1; i <= n; i++)
{
for (int j = 1; j < i; j++)
{
if (a[s][i] + w[i][j] == a[s][j] || a[s][j] + w[i][j] == a[s][i]) e[i].eb(j), e[j].eb(i), ret.pb({i, j});// printf("%lld -> %lld\n", i, j);
}
} dep[s] = 1;
DFS(s);
for (auto tt : ret) if (!op[tt.fi][tt.se]) ans[tt.fi][tt.se] = 1, ans[tt.se][tt.fi] = 1;
}
for (int i = 1; i <= n; i++)
{
for (int j = 1; j <= n; j++)
{
if (i == j) printf("0");
else printf("%d", ans[i][j]);
}
printf("\n");
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 1ms
memory: 4840kb
input:
4 0 3 2 100 3 0 8 100 2 8 0 10 100 100 10 0
output:
0110 1000 1001 0010
result:
ok 4 lines
Test #2:
score: 0
Accepted
time: 0ms
memory: 4800kb
input:
4 0 3 2 100 3 0 8 100 2 8 0 10 100 100 10 0
output:
0110 1000 1001 0010
result:
ok 4 lines
Test #3:
score: -100
Runtime Error
input:
100 0 41659 61282 49636 67326 48035 29694 46438 87384 82143 38685 66540 48746 29800 91786 54931 56232 61941 53423 75707 45135 69244 53802 89998 64199 63778 75825 31745 66975 44537 35793 55663 72647 60768 80884 46657 54066 84568 6266 48213 78216 50369 66761 54861 67607 38509 52250 54210 71135 56840 5...