oj.uz

답안 #132261

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
132261 2019-07-18T15:28:36 Z gs14004 Wild Boar (JOI18_wild_boar) C++17
12 / 100
 302 ms 225180 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 197 ms 223864 KB Output is correct
2 Correct 195 ms 223756 KB Output is correct
3 Correct 192 ms 223852 KB Output is correct
4 Correct 209 ms 223836 KB Output is correct
5 Correct 202 ms 223816 KB Output is correct
6 Correct 191 ms 223880 KB Output is correct
7 Correct 192 ms 223868 KB Output is correct
8 Correct 194 ms 223864 KB Output is correct
9 Correct 193 ms 223816 KB Output is correct
10 Correct 192 ms 223856 KB Output is correct
11 Correct 190 ms 223892 KB Output is correct
12 Correct 192 ms 223936 KB Output is correct
13 Correct 190 ms 223736 KB Output is correct
14 Correct 191 ms 223884 KB Output is correct
15 Correct 191 ms 223964 KB Output is correct
16 Correct 190 ms 223716 KB Output is correct
17 Correct 302 ms 223816 KB Output is correct
18 Correct 190 ms 223864 KB Output is correct
19 Correct 191 ms 223736 KB Output is correct
20 Correct 191 ms 223784 KB Output is correct
21 Correct 190 ms 223820 KB Output is correct
22 Correct 191 ms 223728 KB Output is correct
23 Correct 192 ms 223852 KB Output is correct
24 Correct 190 ms 223736 KB Output is correct
25 Correct 190 ms 223820 KB Output is correct

Subtask #2
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 197 ms 223864 KB Output is correct
2 Correct 195 ms 223756 KB Output is correct
3 Correct 192 ms 223852 KB Output is correct
4 Correct 209 ms 223836 KB Output is correct
5 Correct 202 ms 223816 KB Output is correct
6 Correct 191 ms 223880 KB Output is correct
7 Correct 192 ms 223868 KB Output is correct
8 Correct 194 ms 223864 KB Output is correct
9 Correct 193 ms 223816 KB Output is correct
10 Correct 192 ms 223856 KB Output is correct
11 Correct 190 ms 223892 KB Output is correct
12 Correct 192 ms 223936 KB Output is correct
13 Correct 190 ms 223736 KB Output is correct
14 Correct 191 ms 223884 KB Output is correct
15 Correct 191 ms 223964 KB Output is correct
16 Correct 190 ms 223716 KB Output is correct
17 Correct 302 ms 223816 KB Output is correct
18 Correct 190 ms 223864 KB Output is correct
19 Correct 191 ms 223736 KB Output is correct
20 Correct 191 ms 223784 KB Output is correct
21 Correct 190 ms 223820 KB Output is correct
22 Correct 191 ms 223728 KB Output is correct
23 Correct 192 ms 223852 KB Output is correct
24 Correct 190 ms 223736 KB Output is correct
25 Correct 190 ms 223820 KB Output is correct
26 Correct 194 ms 223824 KB Output is correct
27 Correct 212 ms 224860 KB Output is correct
28 Correct 210 ms 224788 KB Output is correct
29 Incorrect 283 ms 225180 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 197 ms 223864 KB Output is correct
2 Correct 195 ms 223756 KB Output is correct
3 Correct 192 ms 223852 KB Output is correct
4 Correct 209 ms 223836 KB Output is correct
5 Correct 202 ms 223816 KB Output is correct
6 Correct 191 ms 223880 KB Output is correct
7 Correct 192 ms 223868 KB Output is correct
8 Correct 194 ms 223864 KB Output is correct
9 Correct 193 ms 223816 KB Output is correct
10 Correct 192 ms 223856 KB Output is correct
11 Correct 190 ms 223892 KB Output is correct
12 Correct 192 ms 223936 KB Output is correct
13 Correct 190 ms 223736 KB Output is correct
14 Correct 191 ms 223884 KB Output is correct
15 Correct 191 ms 223964 KB Output is correct
16 Correct 190 ms 223716 KB Output is correct
17 Correct 302 ms 223816 KB Output is correct
18 Correct 190 ms 223864 KB Output is correct
19 Correct 191 ms 223736 KB Output is correct
20 Correct 191 ms 223784 KB Output is correct
21 Correct 190 ms 223820 KB Output is correct
22 Correct 191 ms 223728 KB Output is correct
23 Correct 192 ms 223852 KB Output is correct
24 Correct 190 ms 223736 KB Output is correct
25 Correct 190 ms 223820 KB Output is correct
26 Correct 194 ms 223824 KB Output is correct
27 Correct 212 ms 224860 KB Output is correct
28 Correct 210 ms 224788 KB Output is correct
29 Incorrect 283 ms 225180 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# 결과 실행 시간 메모리 Grader output
1 Correct 197 ms 223864 KB Output is correct
2 Correct 195 ms 223756 KB Output is correct
3 Correct 192 ms 223852 KB Output is correct
4 Correct 209 ms 223836 KB Output is correct
5 Correct 202 ms 223816 KB Output is correct
6 Correct 191 ms 223880 KB Output is correct
7 Correct 192 ms 223868 KB Output is correct
8 Correct 194 ms 223864 KB Output is correct
9 Correct 193 ms 223816 KB Output is correct
10 Correct 192 ms 223856 KB Output is correct
11 Correct 190 ms 223892 KB Output is correct
12 Correct 192 ms 223936 KB Output is correct
13 Correct 190 ms 223736 KB Output is correct
14 Correct 191 ms 223884 KB Output is correct
15 Correct 191 ms 223964 KB Output is correct
16 Correct 190 ms 223716 KB Output is correct
17 Correct 302 ms 223816 KB Output is correct
18 Correct 190 ms 223864 KB Output is correct
19 Correct 191 ms 223736 KB Output is correct
20 Correct 191 ms 223784 KB Output is correct
21 Correct 190 ms 223820 KB Output is correct
22 Correct 191 ms 223728 KB Output is correct
23 Correct 192 ms 223852 KB Output is correct
24 Correct 190 ms 223736 KB Output is correct
25 Correct 190 ms 223820 KB Output is correct
26 Correct 194 ms 223824 KB Output is correct
27 Correct 212 ms 224860 KB Output is correct
28 Correct 210 ms 224788 KB Output is correct
29 Incorrect 283 ms 225180 KB Output isn't correct
30 Halted 0 ms 0 KB -