Submission #101280

#	Time	Username	Problem	Language	Result	Execution time	Memory
101280		chunghan	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include<bits/stdc++.h>
#include"molecules.h"

using namespace std;

typedef long long int lld;
typedef pair<int, int> pii;

vector<int> solve(int l, int u, vector<int> w) {
    vector<pii> p;
    vector<int> rst;
    vector<lld> S;
    int r_1, r_2;
    for (int i = 0; i < (int)w.size(); i++)
        p.push_back(pii(w[i], i));
    sort(p.begin(), p.end());
    S.push_back(p[0].first);
    for (int i = 1; i < (int)p.size(); i++)
        S.push_back(S[i-1] + p[i].first);
    for (int i = 1; i < (int)p.size(); i++) {
        lld t = S[i] - u;
        int j = lower_bound(S.begin(), S.end(), t) - S.begin() + 1;
        j--;
        if (S[i] - S[j] >= l) {
            r_1 = j;
            r_2 = i;
            break;
        }
    }
    for (int i = r_1; i <= r_2; i++)
        rst.push_back(p[i].second);
    return rst;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> solve(int, int, std::vector<int>)':
molecules.cpp:30:25: warning: 'r_2' may be used uninitialized in this function [-Wmaybe-uninitialized]
     for (int i = r_1; i <= r_2; i++)
                       ~~^~~~~~
molecules.cpp:13:9: warning: 'r_1' may be used uninitialized in this function [-Wmaybe-uninitialized]
     int r_1, r_2;
         ^~~
/tmp/ccx5TIbj.o: In function `main':
grader.cpp:(.text.startup+0x152): undefined reference to `find_subset(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status