Submission #1084712

#	Time	Username	Problem	Language	Result	Execution time	Memory
1084712		Kerim	Bridges (APIO19_bridges)	C++17	16 / 100	841 ms	3424 KiB

bridges

#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
const int N = 5e4+5;
int v[N];
int main(){
    int n, m;
    scanf("%d%d", &n, &m);
  	assert(m+1 == n);
    for(int i = 1; i <= n-1; ++i){
        int a, b, x;
        scanf("%d%d%d", &a, &b, &x);
        v[i] = x;
    }
    int q;
    scanf("%d", &q);
    while(q--){
        int op;
        scanf("%d", &op);
        if(op == 1){
            int b, r;
            scanf("%d%d", &b, &r);
          	v[b] = r;
            continue;
        }
        int s, w;
        scanf("%d%d", &s, &w);
        int l = 1, r = n;
        for(int i = s-1; i >= 1; i--)
            if(v[i] < w){
                l = i+1;
                break;
            }
        for(int i = s; i < n; i++)
            if(v[i] < w){
                r = i;
                break;
            }
        printf("%d\n", r-l+1);
    }
    return 0;
}

Compilation message (stderr)

bridges.cpp: In function 'int main()':
bridges.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
bridges.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         scanf("%d%d%d", &a, &b, &x);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~
bridges.cpp:27:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
bridges.cpp:30:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         scanf("%d", &op);
      |         ~~~~~^~~~~~~~~~~
bridges.cpp:33:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |             scanf("%d%d", &b, &r);
      |             ~~~~~^~~~~~~~~~~~~~~~
bridges.cpp:38:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |         scanf("%d%d", &s, &w);
      |         ~~~~~^~~~~~~~~~~~~~~~

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