oj.uz

답안 #132113

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
132113 2019-07-18T10:11:03 Z gs14004 Wild Boar (JOI18_wild_boar) C++17
12 / 100
 288 ms 225400 KB 
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 2005;
const int MAXL = 100005;
using lint = long long;
using pi = pair<lint, int>;

struct edg{
	int pos, idx, cost;
};

struct node{
	int pos, num;
	lint cost;
	int from;
	bool operator<(const node &n)const{
		return cost > n.cost;
	}
};

int n, m, q, l;
vector<edg> gph[MAXN];
lint dist[MAXN * 2][MAXN * 2];

struct path_info{
	int midl, midr;
	lint cost;
	bool operator<(const path_info &p)const{
		return cost < p.cost;
	}
};

vector<path_info> plist[MAXN][MAXN];
int ed[MAXN * 2], cost[MAXN * 2];

void preprocess(){
	for(int i=0; i<m; i++){
		int s, e, x; scanf("%d %d %d",&s,&e,&x);
		ed[2 * i] = e; ed[2 * i + 1] = s;
		cost[2 * i] = cost[2 * i + 1] = x;
		gph[s].push_back({e, i*2, x});
		gph[e].push_back({s, i*2+1, x});
	}
	memset(dist, 0x3f, sizeof(dist));
	for(int i=0; i<2*m; i++){
		dist[i][i] = cost[i];
		priority_queue<pi, vector<pi>, greater<pi> > pq;
		pq.emplace(cost[i], i);
		while(!pq.empty()){
			auto x = pq.top(); pq.pop();
			if(dist[i][x.second] != x.first) continue;
			for(auto &j : gph[ed[x.second]]){
				if((j.idx ^ x.second) == 1) continue;
				if(dist[i][j.idx] > x.first + j.cost){
					dist[i][j.idx] = x.first + j.cost;
					pq.emplace(dist[i][j.idx], j.idx);
				}
			}
		}
	}
	for(int i=1; i<=n; i++){
		for(int j=1; j<=n; j++){
			if(i != j){
				vector<path_info> pth;
				for(auto &k : gph[i]){
					for(auto &l : gph[j]){
						lint cost = dist[k.idx][l.idx ^ 1];
						pth.push_back({k.pos, l.pos, cost});
					}
				}
				sort(pth.begin(), pth.end());
				if(pth.size() <= 2){
					plist[i][j] = pth;
					continue;
				}
				plist[i][j].push_back(pth[0]);
				plist[i][j].push_back(pth[1]);
				if(pth[0].midl != pth[1].midl && pth[0].midr != pth[1].midr){
					plist[i][j].push_back(pth[2]);
					pi nxt_punkty = pi(-1, -1);
					if(pth[2].midl == pth[1].midl){
						nxt_punkty = pi(pth[2].midl, pth[0].midr);
					}
					else if(pth[2].midl == pth[0].midl){
						nxt_punkty = pi(pth[2].midl, pth[1].midr);
					}
					else if(pth[2].midr == pth[1].midr){
						nxt_punkty = pi(pth[0].midl, pth[2].midr);
					}
					else if(pth[2].midr == pth[0].midr){
						nxt_punkty = pi(pth[1].midl, pth[2].midr);
					}
					for(int k = 3; k < pth.size(); k++){
						if(nxt_punkty != pi(pth[k].midl, pth[k].midr)){
							plist[i][j].push_back(pth[k]);
							break;
						}
					}
				}
				else if(pth[0].midl == pth[1].midl){
					for(int x = 0; x < pth.size(); x++){
						if(pth[x].midl != pth[0].midl){
							plist[i][j].push_back(pth[x]);
							for(int y = x + 1; y < pth.size(); y++){
								if(pi(pth[0].midl, pth[x].midr) != pi(pth[y].midl, pth[y].midr)){
									plist[i][j].push_back(pth[y]);
									break;
								}
							}
							break;
						}
					}
				}
				else if(pth[0].midr == pth[1].midr){
					for(int x = 0; x < pth.size(); x++){
						if(pth[x].midr != pth[0].midr){
							plist[i][j].push_back(pth[x]);
							for(int y = x + 1; y < pth.size(); y++){
								if(pi(pth[x].midl, pth[0].midr) != pi(pth[y].midl, pth[y].midr)){
									plist[i][j].push_back(pth[y]);
									break;
								}
							}
							break;
						}
					}
				}
				else assert(0);
			//	for(auto &k : plist[i][j]) printf("(%d -> %d), (%d -> %d), %lld\n", i, k.midl, k.midr, j, k.cost);
			}
		}
	}
}

int a[MAXL];
lint dp[MAXL][4];

int main(){
	scanf("%d %d %d %d",&n,&m,&q,&l);
	preprocess();
	for(int i=0; i<l; i++) scanf("%d",&a[i]);
	for(int i=0; i<q; i++){
		int x, v; scanf("%d %d",&x,&v);
		x--;
		a[x] = v;
		memset(dp, 0x3f, sizeof(dp));
		for(int k=0; k<plist[a[0]][a[1]].size(); k++){
			dp[1][k] = plist[a[0]][a[1]][k].cost;
		}
		for(int k=2; k<l; k++){
			for(int x = 0; x < plist[a[k - 2]][a[k - 1]].size(); x++){
				for(int y = 0; y < plist[a[k - 1]][a[k]].size(); y++){
					if(plist[a[k - 2]][a[k - 1]][x].midr != plist[a[k - 1]][a[k]][y].midl){
						dp[k][y] = min(dp[k][y], dp[k - 1][x] + plist[a[k - 1]][a[k]][y].cost);
					}
				}
			}
		}
		int w = plist[a[l - 2]][a[l - 1]].size();
		lint dap = *min_element(dp[l - 1], dp[l - 1] + w);
		if(dap > 9e17) dap = -1;
		printf("%lld\n", dap);
	}
}

Compilation message

wild_boar.cpp: In function 'void preprocess()':
wild_boar.cpp:93:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int k = 3; k < pth.size(); k++){
                     ~~^~~~~~~~~~~~
wild_boar.cpp:101:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int x = 0; x < pth.size(); x++){
                     ~~^~~~~~~~~~~~
wild_boar.cpp:104:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
        for(int y = x + 1; y < pth.size(); y++){
                           ~~^~~~~~~~~~~~
wild_boar.cpp:115:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int x = 0; x < pth.size(); x++){
                     ~~^~~~~~~~~~~~
wild_boar.cpp:118:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
        for(int y = x + 1; y < pth.size(); y++){
                           ~~^~~~~~~~~~~~
wild_boar.cpp: In function 'int main()':
wild_boar.cpp:147:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int k=0; k<plist[a[0]][a[1]].size(); k++){
                ~^~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:151:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for(int x = 0; x < plist[a[k - 2]][a[k - 1]].size(); x++){
                   ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:152:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int y = 0; y < plist[a[k - 1]][a[k]].size(); y++){
                    ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp: In function 'void preprocess()':
wild_boar.cpp:38:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int s, e, x; scanf("%d %d %d",&s,&e,&x);
                ~~~~~^~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp: In function 'int main()':
wild_boar.cpp:139:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d %d",&n,&m,&q,&l);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
wild_boar.cpp:141:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=0; i<l; i++) scanf("%d",&a[i]);
                         ~~~~~^~~~~~~~~~~~
wild_boar.cpp:143:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int x, v; scanf("%d %d",&x,&v);
             ~~~~~^~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 195 ms 223864 KB Output is correct
2 Correct 195 ms 223904 KB Output is correct
3 Correct 194 ms 223780 KB Output is correct
4 Correct 220 ms 223868 KB Output is correct
5 Correct 194 ms 223780 KB Output is correct
6 Correct 194 ms 223840 KB Output is correct
7 Correct 195 ms 223736 KB Output is correct
8 Correct 193 ms 223864 KB Output is correct
9 Correct 193 ms 223864 KB Output is correct
10 Correct 195 ms 223836 KB Output is correct
11 Correct 193 ms 223852 KB Output is correct
12 Correct 197 ms 223816 KB Output is correct
13 Correct 197 ms 223880 KB Output is correct
14 Correct 192 ms 223736 KB Output is correct
15 Correct 194 ms 223736 KB Output is correct
16 Correct 193 ms 223800 KB Output is correct
17 Correct 194 ms 223884 KB Output is correct
18 Correct 205 ms 223936 KB Output is correct
19 Correct 234 ms 223740 KB Output is correct
20 Correct 194 ms 223784 KB Output is correct
21 Correct 194 ms 223736 KB Output is correct
22 Correct 193 ms 223836 KB Output is correct
23 Correct 193 ms 223764 KB Output is correct
24 Correct 193 ms 223736 KB Output is correct
25 Correct 196 ms 223860 KB Output is correct

Subtask #2
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 195 ms 223864 KB Output is correct
2 Correct 195 ms 223904 KB Output is correct
3 Correct 194 ms 223780 KB Output is correct
4 Correct 220 ms 223868 KB Output is correct
5 Correct 194 ms 223780 KB Output is correct
6 Correct 194 ms 223840 KB Output is correct
7 Correct 195 ms 223736 KB Output is correct
8 Correct 193 ms 223864 KB Output is correct
9 Correct 193 ms 223864 KB Output is correct
10 Correct 195 ms 223836 KB Output is correct
11 Correct 193 ms 223852 KB Output is correct
12 Correct 197 ms 223816 KB Output is correct
13 Correct 197 ms 223880 KB Output is correct
14 Correct 192 ms 223736 KB Output is correct
15 Correct 194 ms 223736 KB Output is correct
16 Correct 193 ms 223800 KB Output is correct
17 Correct 194 ms 223884 KB Output is correct
18 Correct 205 ms 223936 KB Output is correct
19 Correct 234 ms 223740 KB Output is correct
20 Correct 194 ms 223784 KB Output is correct
21 Correct 194 ms 223736 KB Output is correct
22 Correct 193 ms 223836 KB Output is correct
23 Correct 193 ms 223764 KB Output is correct
24 Correct 193 ms 223736 KB Output is correct
25 Correct 196 ms 223860 KB Output is correct
26 Correct 196 ms 223756 KB Output is correct
27 Correct 214 ms 225116 KB Output is correct
28 Correct 214 ms 225152 KB Output is correct
29 Incorrect 288 ms 225400 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 195 ms 223864 KB Output is correct
2 Correct 195 ms 223904 KB Output is correct
3 Correct 194 ms 223780 KB Output is correct
4 Correct 220 ms 223868 KB Output is correct
5 Correct 194 ms 223780 KB Output is correct
6 Correct 194 ms 223840 KB Output is correct
7 Correct 195 ms 223736 KB Output is correct
8 Correct 193 ms 223864 KB Output is correct
9 Correct 193 ms 223864 KB Output is correct
10 Correct 195 ms 223836 KB Output is correct
11 Correct 193 ms 223852 KB Output is correct
12 Correct 197 ms 223816 KB Output is correct
13 Correct 197 ms 223880 KB Output is correct
14 Correct 192 ms 223736 KB Output is correct
15 Correct 194 ms 223736 KB Output is correct
16 Correct 193 ms 223800 KB Output is correct
17 Correct 194 ms 223884 KB Output is correct
18 Correct 205 ms 223936 KB Output is correct
19 Correct 234 ms 223740 KB Output is correct
20 Correct 194 ms 223784 KB Output is correct
21 Correct 194 ms 223736 KB Output is correct
22 Correct 193 ms 223836 KB Output is correct
23 Correct 193 ms 223764 KB Output is correct
24 Correct 193 ms 223736 KB Output is correct
25 Correct 196 ms 223860 KB Output is correct
26 Correct 196 ms 223756 KB Output is correct
27 Correct 214 ms 225116 KB Output is correct
28 Correct 214 ms 225152 KB Output is correct
29 Incorrect 288 ms 225400 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Correct 195 ms 223864 KB Output is correct
2 Correct 195 ms 223904 KB Output is correct
3 Correct 194 ms 223780 KB Output is correct
4 Correct 220 ms 223868 KB Output is correct
5 Correct 194 ms 223780 KB Output is correct
6 Correct 194 ms 223840 KB Output is correct
7 Correct 195 ms 223736 KB Output is correct
8 Correct 193 ms 223864 KB Output is correct
9 Correct 193 ms 223864 KB Output is correct
10 Correct 195 ms 223836 KB Output is correct
11 Correct 193 ms 223852 KB Output is correct
12 Correct 197 ms 223816 KB Output is correct
13 Correct 197 ms 223880 KB Output is correct
14 Correct 192 ms 223736 KB Output is correct
15 Correct 194 ms 223736 KB Output is correct
16 Correct 193 ms 223800 KB Output is correct
17 Correct 194 ms 223884 KB Output is correct
18 Correct 205 ms 223936 KB Output is correct
19 Correct 234 ms 223740 KB Output is correct
20 Correct 194 ms 223784 KB Output is correct
21 Correct 194 ms 223736 KB Output is correct
22 Correct 193 ms 223836 KB Output is correct
23 Correct 193 ms 223764 KB Output is correct
24 Correct 193 ms 223736 KB Output is correct
25 Correct 196 ms 223860 KB Output is correct
26 Correct 196 ms 223756 KB Output is correct
27 Correct 214 ms 225116 KB Output is correct
28 Correct 214 ms 225152 KB Output is correct
29 Incorrect 288 ms 225400 KB Output isn't correct
30 Halted 0 ms 0 KB -