oj.uz

Submission #132256

# Submission time Handle Problem Language Result Execution time Memory
132256 2019-07-18T15:16:47 Z gs14004 Wild Boar (JOI18_wild_boar) C++17
12 / 100
 283 ms 225256 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(pi(pth[0].midl, pth[1].midr) == pi(pth[2].midl, pth[2].midr)){
						nxt_punkty = pi(pth[1].midl, pth[0].midr);
					}
					else if(pi(pth[1].midl, pth[0].midr) == pi(pth[2].midl, pth[2].midr)){
						nxt_punkty = pi(pth[0].midl, pth[1].midr);
					}
					else 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:99:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int k = 3; k < pth.size(); k++){
                     ~~^~~~~~~~~~~~
wild_boar.cpp:107:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int x = 0; x < pth.size(); x++){
                     ~~^~~~~~~~~~~~
wild_boar.cpp:110:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
        for(int y = x + 1; y < pth.size(); y++){
                           ~~^~~~~~~~~~~~
wild_boar.cpp:121:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for(int x = 0; x < pth.size(); x++){
                     ~~^~~~~~~~~~~~
wild_boar.cpp:124:29: 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:153:17: 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:157:21: 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:158:22: 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:145:7: 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:147:30: 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:149:18: 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

# Verdict Execution time Memory Grader output
1 Correct 191 ms 223736 KB Output is correct
2 Correct 192 ms 223868 KB Output is correct
3 Correct 190 ms 223736 KB Output is correct
4 Correct 195 ms 223900 KB Output is correct
5 Correct 195 ms 223836 KB Output is correct
6 Correct 192 ms 223752 KB Output is correct
7 Correct 193 ms 223864 KB Output is correct
8 Correct 195 ms 223868 KB Output is correct
9 Correct 193 ms 223800 KB Output is correct
10 Correct 190 ms 223736 KB Output is correct
11 Correct 193 ms 223872 KB Output is correct
12 Correct 192 ms 223736 KB Output is correct
13 Correct 190 ms 223820 KB Output is correct
14 Correct 196 ms 223868 KB Output is correct
15 Correct 191 ms 223832 KB Output is correct
16 Correct 192 ms 223864 KB Output is correct
17 Correct 191 ms 223736 KB Output is correct
18 Correct 196 ms 223936 KB Output is correct
19 Correct 192 ms 223736 KB Output is correct
20 Correct 191 ms 223860 KB Output is correct
21 Correct 196 ms 223864 KB Output is correct
22 Correct 201 ms 223828 KB Output is correct
23 Correct 191 ms 223864 KB Output is correct
24 Correct 191 ms 223848 KB Output is correct
25 Correct 191 ms 223948 KB Output is correct

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 191 ms 223736 KB Output is correct
2 Correct 192 ms 223868 KB Output is correct
3 Correct 190 ms 223736 KB Output is correct
4 Correct 195 ms 223900 KB Output is correct
5 Correct 195 ms 223836 KB Output is correct
6 Correct 192 ms 223752 KB Output is correct
7 Correct 193 ms 223864 KB Output is correct
8 Correct 195 ms 223868 KB Output is correct
9 Correct 193 ms 223800 KB Output is correct
10 Correct 190 ms 223736 KB Output is correct
11 Correct 193 ms 223872 KB Output is correct
12 Correct 192 ms 223736 KB Output is correct
13 Correct 190 ms 223820 KB Output is correct
14 Correct 196 ms 223868 KB Output is correct
15 Correct 191 ms 223832 KB Output is correct
16 Correct 192 ms 223864 KB Output is correct
17 Correct 191 ms 223736 KB Output is correct
18 Correct 196 ms 223936 KB Output is correct
19 Correct 192 ms 223736 KB Output is correct
20 Correct 191 ms 223860 KB Output is correct
21 Correct 196 ms 223864 KB Output is correct
22 Correct 201 ms 223828 KB Output is correct
23 Correct 191 ms 223864 KB Output is correct
24 Correct 191 ms 223848 KB Output is correct
25 Correct 191 ms 223948 KB Output is correct
26 Correct 192 ms 224020 KB Output is correct
27 Correct 215 ms 225016 KB Output is correct
28 Correct 216 ms 224760 KB Output is correct
29 Incorrect 283 ms 225256 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 191 ms 223736 KB Output is correct
2 Correct 192 ms 223868 KB Output is correct
3 Correct 190 ms 223736 KB Output is correct
4 Correct 195 ms 223900 KB Output is correct
5 Correct 195 ms 223836 KB Output is correct
6 Correct 192 ms 223752 KB Output is correct
7 Correct 193 ms 223864 KB Output is correct
8 Correct 195 ms 223868 KB Output is correct
9 Correct 193 ms 223800 KB Output is correct
10 Correct 190 ms 223736 KB Output is correct
11 Correct 193 ms 223872 KB Output is correct
12 Correct 192 ms 223736 KB Output is correct
13 Correct 190 ms 223820 KB Output is correct
14 Correct 196 ms 223868 KB Output is correct
15 Correct 191 ms 223832 KB Output is correct
16 Correct 192 ms 223864 KB Output is correct
17 Correct 191 ms 223736 KB Output is correct
18 Correct 196 ms 223936 KB Output is correct
19 Correct 192 ms 223736 KB Output is correct
20 Correct 191 ms 223860 KB Output is correct
21 Correct 196 ms 223864 KB Output is correct
22 Correct 201 ms 223828 KB Output is correct
23 Correct 191 ms 223864 KB Output is correct
24 Correct 191 ms 223848 KB Output is correct
25 Correct 191 ms 223948 KB Output is correct
26 Correct 192 ms 224020 KB Output is correct
27 Correct 215 ms 225016 KB Output is correct
28 Correct 216 ms 224760 KB Output is correct
29 Incorrect 283 ms 225256 KB Output isn't correct
30 Halted 0 ms 0 KB -

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 191 ms 223736 KB Output is correct
2 Correct 192 ms 223868 KB Output is correct
3 Correct 190 ms 223736 KB Output is correct
4 Correct 195 ms 223900 KB Output is correct
5 Correct 195 ms 223836 KB Output is correct
6 Correct 192 ms 223752 KB Output is correct
7 Correct 193 ms 223864 KB Output is correct
8 Correct 195 ms 223868 KB Output is correct
9 Correct 193 ms 223800 KB Output is correct
10 Correct 190 ms 223736 KB Output is correct
11 Correct 193 ms 223872 KB Output is correct
12 Correct 192 ms 223736 KB Output is correct
13 Correct 190 ms 223820 KB Output is correct
14 Correct 196 ms 223868 KB Output is correct
15 Correct 191 ms 223832 KB Output is correct
16 Correct 192 ms 223864 KB Output is correct
17 Correct 191 ms 223736 KB Output is correct
18 Correct 196 ms 223936 KB Output is correct
19 Correct 192 ms 223736 KB Output is correct
20 Correct 191 ms 223860 KB Output is correct
21 Correct 196 ms 223864 KB Output is correct
22 Correct 201 ms 223828 KB Output is correct
23 Correct 191 ms 223864 KB Output is correct
24 Correct 191 ms 223848 KB Output is correct
25 Correct 191 ms 223948 KB Output is correct
26 Correct 192 ms 224020 KB Output is correct
27 Correct 215 ms 225016 KB Output is correct
28 Correct 216 ms 224760 KB Output is correct
29 Incorrect 283 ms 225256 KB Output isn't correct
30 Halted 0 ms 0 KB -