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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#786112#6404. Shuttle TourStayAloneTL 189ms352656kbC++174.4kb2024-11-26 20:21:152024-11-26 20:21:20

Judging History

你现在查看的是最新测评结果

  • [2024-11-26 20:21:20]
  • 评测
  • 测评结果:TL
  • 用时:189ms
  • 内存:352656kb
  • [2024-11-26 20:21:15]
  • 提交

answer

#include <bits/stdc++.h>
#define rep1(i, l, r) for (int i = l; i <= int(r); ++i)
#define rep2(i, l, r) for (int i = l; i >= int(r); --i)
#define rer(i, l, r, a) rep1(i, l, r) read(a[i])
#define ptc putchar
#define il inline
#define eb emplace_back
#define ef emplace_front
#define mp make_pair
#define fst first
#define snd second
#define sqr(x) ((x) * (x))
#define ls(x) x << 1
#define rs(x) x << 1 | 1
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
// typedef __int128 bll;
// typedef unsigned __int128 ubll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int MAXN = 2e5 + 10, LOGN = log2(MAXN) + 1, inf = ~0U >> 2, INF = ~0U >> 1;
const int dx[] = {0, 0, 1, -1}, dy[] = {1, -1, 0, 0};
namespace stupid_lrc {
	template <typename T> il bool read(T &x) {
		x = 0; bool f = false; char ch;
 		while (!isdigit(ch = getchar())) {
			f ^= !(ch ^ '-');
			if (ch == EOF) return false;
		}
		while (isdigit(ch)) x = (x << 1) + (x << 3) + (ch & 15), ch = getchar();
		if (f) x = ~x + 1; return true;
	}
	il int read() {int x; read(x); return x;}

	template <typename T> il bool read(pair <T, T> &x) {return read(x.fst) && read(x.snd);}

	template <typename T> il void gmin(T &x, T y) {x = x < y ? x : y;}

 	template <typename T> il void gmax(T &x, T y) {x = x > y ? x : y;}

	template <typename T, typename ...L>
	il bool read(T &x, L &...y) {return read(x) && read(y...);}

	template <typename T> il T lowbit(const T &x) {return x & -x;}
}
using namespace stupid_lrc;
int n, q, cnt, dep[MAXN], a[MAXN], dfn[MAXN], edfn[MAXN], stp, id[MAXN];
int f[MAXN][20]; ll sum[MAXN]; char s[MAXN];
vector <pii> lnk[MAXN];

struct {
	#define STZ MAXN << 2
	int mii[STZ], maa[STZ];
	
	il void pushup(int x) {
		mii[x] = min(mii[ls(x)], mii[rs(x)]);
		maa[x] = max(maa[ls(x)], maa[rs(x)]);
	}
	
	il void build(int x, int l, int r, int t) {
		if (l == r) {
			if (t == id[l] && a[l]) maa[x] = mii[x] = dfn[l];
			else maa[x] = -1, mii[x] = inf;
			return;
		} int mid = l + r >> 1;
		build(ls(x), l, mid, t); build(rs(x), mid + 1, r, t);
		pushup(x);
	}
	
	il void upd(int x, int l, int r, int k, int t) {
		if (l == r) {
			if (t == id[l] && a[l]) maa[x] = mii[x] = dfn[l];
			else maa[x] = -1, mii[x] = inf;
			return;
		} int mid = l + r >> 1;
		k <= mid ? upd(ls(x), l, mid, k, t) : upd(rs(x), mid + 1, r, k, t);
		pushup(x);
	}
	
	il int query1(int x, int l, int r, int ql, int qr) {
		if (l > qr || r < ql) return inf;
		if (l >= ql && r <= qr) return mii[x];
		int mid = l + r >> 1;
		return min(query1(ls(x), l, mid, ql, qr), query1(rs(x), mid + 1, r, ql, qr));
	}
	
	il int query2(int x, int l, int r, int ql, int qr) {
		if (l > qr || r < ql) return -1;
		if (l >= ql && r <= qr) return maa[x];
		int mid = l + r >> 1;
		return max(query2(ls(x), l, mid, ql, qr), query2(rs(x), mid + 1, r, ql, qr));
	}
} T[55];

il void dfs(int x, int p, int t) {
	dfn[x] = ++stp; id[x] = t; edfn[stp] = x;
	bool fg = 0; f[x][0] = p; dep[x] = dep[p] + 1;
	for (auto t : lnk[x]) if (t.fst ^ p) {
		sum[t.fst] = sum[x] + t.snd;
		if (fg) dfs(t.fst, x, ++cnt);
		else dfs(t.fst, x, cnt), fg = 1;
	}
}

il ll dis(int x, int y) {
	ll ans = sum[x] + sum[y];
	if (dep[x] < dep[y]) swap(x, y);
	rep2(i, 17, 0) if (dep[x] - dep[y] >= 1 << i) x = f[x][i];
	if (x == y) return ans - sum[x] * 2;
	rep2(i, 17, 0) if (f[x][i] ^ f[y][i]) x = f[x][i], y = f[y][i];
	return ans - sum[f[x][0]] * 2;
}

il void solve() {
	read(n, q); cnt = 0; scanf("%s", s + 1);
	rep1(i, 1, n) a[i] = s[i] & 15;
	int u, v, w;
	rep1(i, 2, n) read(u, v, w), lnk[u].eb(v, w), lnk[v].eb(u, w);
	dfs(1, 0, ++cnt);
	rep1(j, 1, 17) rep1(i, 1, n) f[i][j] = f[f[i][j - 1]][j - 1];
	rep1(i, 1, cnt) T[i].build(1, 1, n, i);
	assert(cnt <= 50);
	while (q--) {
		int op = read();
		if (op == 1) {
			int x = read(); a[x] ^= 1;
			T[id[x]].upd(1, 1, n, x, id[x]);
		} else {
			vector <int> dot; int l, r; read(l, r);
			rep1(i, 1, cnt) {
				int x = T[i].query1(1, 1, n, l, r), y = T[i].query2(1, 1, n, l, r);
				if (x >= 1 && x <= n) dot.eb(edfn[x]);
				if (y >= 1 && y <= n && x != y) dot.eb(edfn[y]);
			} sort(begin(dot), end(dot), [&](const int &x, const int &y){return dfn[x] < dfn[y];});
			if (dot.empty()) {
				puts("-1");
				continue;
			} int q = dot.size(); ll ans = 0;
			rep1(i, 0, q - 1) ans += dis(dot[i], dot[(i + 1) % q]);
			printf("%lld\n", ans);
		}
	}
}

int main() {
	for (int T = 1; T--; ) solve();
	return 0;
}


详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 21832kb

input:

5 6
10110
1 2 1
1 3 10
2 4 100
3 5 1000
2 1 5
1 3
2 1 5
2 2 4
2 5 5
2 1 1

output:

222
202
0
-1
0

result:

ok 5 number(s): "222 202 0 -1 0"

Test #2:

score: 0
Accepted
time: 186ms
memory: 109424kb

input:

50 200000
00100100100001101010110100000111100011101110011010
14 47 940241413
11 43 331483591
37 38 496247070
47 46 832459694
7 15 16479291
1 30 402388666
30 8 513064064
46 50 739311480
5 4 761894947
32 41 631669659
17 24 715786564
35 20 763151642
32 33 492466005
39 11 186023146
9 7 805081251
3 42 25...

output:

17149847378
-1
26540740138
29613692754
21307948558
27003443184
11893407374
18332625722
20412196350
20281573062
29727468956
9593307160
9380710234
23682775470
16688997988
2856655228
14982588156
0
-1
9140136614
26193602866
22558599316
24807163344
19126284190
8533875940
7695830712
18079494744
0
27004673...

result:

ok 100000 numbers

Test #3:

score: 0
Accepted
time: 189ms
memory: 116732kb

input:

50 200000
10010001110011101101101011010011100101101010111001
1 25 560163135
2 7 696374536
33 39 14485266
39 22 456690113
4 5 267811886
18 6 657680382
3 43 865617406
25 14 885515220
41 34 919525052
42 50 410634144
8 3 487403277
3 30 701549676
2 43 54223104
7 34 691078766
14 23 323352590
26 48 4936558...

output:

17177676326
31373486130
15290175638
8192974494
22734716092
27802380120
6315957348
0
15780401446
15929384564
26423899248
9639532596
21199366790
26413065782
-1
29063665908
29925313598
28651879288
17144176262
16526083688
28206620550
26873163342
14840246174
32414950818
29985336496
0
11937422088
11131990...

result:

ok 100000 numbers

Test #4:

score: 0
Accepted
time: 182ms
memory: 107728kb

input:

50 200000
01011001001010000100001101100111011001101011101000
34 29 654100339
33 5 947063765
45 25 962067151
11 13 509130797
26 47 988757358
49 22 75267557
7 11 431530851
46 1 531969122
22 43 449891945
34 6 526679193
50 17 499004364
22 23 226725950
26 48 203414490
11 44 900725507
10 29 451714017
35 2...

output:

24080362406
0
0
21418182584
28358635244
28257750030
24520294678
21418182584
0
15335211126
28621468542
18664505530
19335499776
32374868794
23618866752
26801803500
24116134918
27676993638
30222353942
25612316674
20504702130
28400398734
29472795250
24400110084
20586186786
25612316674
0
30067400886
1297...

result:

ok 100000 numbers

Test #5:

score: 0
Accepted
time: 0ms
memory: 19008kb

input:

2 10
01
1 2 340134039
2 1 2
1 1
2 1 2
1 2
2 1 1
1 2
2 2 2
1 2
2 2 2
1 1

output:

0
680268078
0
0
-1

result:

ok 5 number(s): "0 680268078 0 0 -1"

Test #6:

score: 0
Accepted
time: 67ms
memory: 59568kb

input:

200000 100
1100001001001101010000111111011011101010001011011011011010101111010001111010101100101001010000110100100011111010011100101010010001011010111100101110010000101010000100111100000011001100111101110011000011010011011011100101100111101010111101110111001111111010001010010000110110100000111000111...

output:

187263442365796
187267199881816
187176203274470
187269896250018
187239740690858
186974761323092
187257776119514
187269896250018
187035239640930
186911636122472
187263030332128
187121605387264
187264313877130
187263442365796
187269896250018
187249588971104
187263442365796
187263442365796
187264313877...

result:

ok 50 numbers

Test #7:

score: 0
Accepted
time: 65ms
memory: 65180kb

input:

200000 100
1000100001000101011000010111101000110001110111010000000010100100001110001110011001001011000010001000101111000111000100111101111111011111101101011110010101110000011011000101010000101110000100101000101110011111110000010011010010001001010001101000001111001001011111110100100011011100010100101...

output:

187406582272754
187713357625510
187713357625510
187710409039730
187708440524170
187705546874918
187675370061160
187696435101958
187704004975728
187708440524170
187708440524170
187490194913408
186797006090958
187708440524170
187708440524170
187694259450196
187691068337432
187699562335668
187708440524...

result:

ok 50 numbers

Test #8:

score: 0
Accepted
time: 106ms
memory: 352656kb

input:

200000 100
1101110101111010101100101110111101001010101100011111011010101101001011000101011011110110110001000000110000100110101010001011100110100101010110001111000100011010101011100011111010111001011110110001001010000001010100000000100010010000110100101010000111010100100111001011101001000011010101011...

output:

187071935465024
186902015424650
186944515923806
187083386398370
187083386398370
186176053533638
187210565613960
186840136921858
187059112646348
186963648681914
187157614978100
187171857507720
186687953621656
187037985042418
184267618052908
185811051686090
186716949587794
186666528269428
186754258305...

result:

ok 50 numbers

Test #9:

score: -100
Time Limit Exceeded

input:

200000 200000
1010011001010010101000001000111111110110111100000011000110010101000001101110111000100011010101100011001011101100010100000010100000100110100001000111010000011001010111001001000000111001100110010100101010111000000000011110101110010101110110110101100001011001101010101001000010000010000000...

output:

185874943612396
186901189463748
185325592077116
187007806200644
185723936146376
186683200699722
186830061692652
186256265895174
186860903405924
186810412385682
186744028102060
186994420108608
186831837842360
180459525430870
186966649455016
186952309712742
185810351127924
186849618327982
186494273101...

result: