Submission #984359

#	Time	Username	Problem	Language	Result	Execution time	Memory
984359		saayan007	Bridges (APIO19_bridges)	C++17	0 / 100	94 ms	1012 KiB

bridges

#include "bits/stdc++.h"
using namespace std;

#define int long long
#define rep(i, a, b) for(int (i) = (a); i <= (b); ++i)
#define repd(i, a, b) for(int (i) = (a); i >= (b); --i)

#define em emplace
#define eb emplace_back

#define pi pair<int, int>
#define fr first
#define sc second
#define mp make_pair

const char nl = '\n';
const int mod = 1e9 + 7;
const int inf = 1e17;

#warning constants according to subtask
const int N = 1001;
int n, m, q;
int ed[N][3];
set<pair<int, int>> adj[N];
int res = 0;
bool vis[N];

void modify(int b, int r) {
    rep(j, 0, 1) adj[ed[b][j]].erase(mp(ed[b][1 - j], ed[b][2]));
    ed[b][2] = r;
    rep(j, 0, 1) adj[ed[b][j]].insert(mp(ed[b][1 - j], ed[b][2]));
}

void dfs(int x, int p, int w) {
    ++res;
    vis[x] = 1;
    for(auto [y, d] : adj[x]) {
        if(vis[y] || y == p || w > d) continue;
        dfs(y, x, w);
    }
}

void query(int s, int w) {
    rep(i, 1, n) vis[i] = 0;
    res = 0;
    dfs(s, -1, w);
    cout << res << nl;
}

int32_t main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    cin >> n >> m;
    rep(i, 1, m) {
        rep(j, 0, 2) cin >> ed[i][j];
        rep(j, 0, 1) adj[ed[i][j]].insert(mp(ed[i][1 - j], ed[i][2]));
    }

    cin >> q;
    rep(i, 1, q) {
        int t; cin >> t;
        if(t == 1) {
            int b, r; cin >> b >> r;
            modify(b, r);
        }
        else {
            int s, w; cin >> s >> w;
            query(s, w);
        }
    }
}

Compilation message (stderr)

bridges.cpp:20:2: warning: #warning constants according to subtask [-Wcpp]
   20 | #warning constants according to subtask
      |  ^~~~~~~
bridges.cpp: In function 'void modify(long long int, long long int)':
bridges.cpp:5:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    5 | #define rep(i, a, b) for(int (i) = (a); i <= (b); ++i)
      |                              ^
bridges.cpp:29:5: note: in expansion of macro 'rep'
   29 |     rep(j, 0, 1) adj[ed[b][j]].erase(mp(ed[b][1 - j], ed[b][2]));
      |     ^~~
bridges.cpp:5:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    5 | #define rep(i, a, b) for(int (i) = (a); i <= (b); ++i)
      |                              ^
bridges.cpp:31:5: note: in expansion of macro 'rep'
   31 |     rep(j, 0, 1) adj[ed[b][j]].insert(mp(ed[b][1 - j], ed[b][2]));
      |     ^~~
bridges.cpp: In function 'void query(long long int, long long int)':
bridges.cpp:5:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    5 | #define rep(i, a, b) for(int (i) = (a); i <= (b); ++i)
      |                              ^
bridges.cpp:44:5: note: in expansion of macro 'rep'
   44 |     rep(i, 1, n) vis[i] = 0;
      |     ^~~
bridges.cpp: In function 'int32_t main()':
bridges.cpp:5:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    5 | #define rep(i, a, b) for(int (i) = (a); i <= (b); ++i)
      |                              ^
bridges.cpp:55:5: note: in expansion of macro 'rep'
   55 |     rep(i, 1, m) {
      |     ^~~
bridges.cpp:5:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    5 | #define rep(i, a, b) for(int (i) = (a); i <= (b); ++i)
      |                              ^
bridges.cpp:56:9: note: in expansion of macro 'rep'
   56 |         rep(j, 0, 2) cin >> ed[i][j];
      |         ^~~
bridges.cpp:5:30: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses]
    5 | #define rep(i, a, b) for(int (i) = (a); i <= (b); ++i)
      |                              ^
bridges.cpp:57:9: note: in expansion of macro 'rep'
   57 |         rep(j, 0, 1) adj[ed[i][j]].insert(mp(ed[i][1 - j], ed[i][2]));
      |         ^~~
bridges.cpp:5:30: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
    5 | #define rep(i, a, b) for(int (i) = (a); i <= (b); ++i)
      |                              ^
bridges.cpp:61:5: note: in expansion of macro 'rep'
   61 |     rep(i, 1, q) {
      |     ^~~

• Subtask 1: 0 / 13
• Subtask 2: 0 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 14
• Subtask 5: 0 / 13
• Subtask 6: 0 / 27