Submission #1124848

#	Time	Username	Problem	Language	Result	Execution time	Memory
1124848		njoop	Bank (IZhO14_bank)	C++17	0 / 100	3 ms	4416 KiB

bank

#include <bits/stdc++.h>

using namespace std;

int cov[1000010], mon[1000010], notes[30], ppl[30], n, m;

int main() {
    cin >> n >> m;
    for(int i=1; i<=n; i++) {
        cin >> ppl[i];
    }
    for(int i=1; i<=m; i++) {
        cin >> notes[i];
    }
    for(int i=0; i<=(1<<20); i++) {
        cov[i] = -1;
    }
    cov[0] = 0;
    for(int i=0; i<(1<<m); i++) {
        for(int j=0; j<m; j++) {
            if(i & (1 << j) == 0) continue;
            int pre = i & ~(1 << j);
            if(cov[pre] == -1) continue;
            if(mon[pre]+notes[j+1] < ppl[cov[pre]+1]) {
                cov[i] = cov[pre];
                mon[i] = mon[pre]+notes[j+1];
            } else if(mon[pre]+notes[j+1] == ppl[cov[pre]+1]) {
                cov[i] = cov[pre]+1;
                mon[i] = 0;
            }
        }
        if(cov[i] == n) {
            cout << "YES";
            return 0;
        }
    }
    cout << "NO";
    return 0;
}

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.cpp:16:16: warning: iteration 1000010 invokes undefined behavior [-Waggressive-loop-optimizations]
   16 |         cov[i] = -1;
      |         ~~~~~~~^~~~
bank.cpp:15:19: note: within this loop
   15 |     for(int i=0; i<=(1<<20); i++) {
      |                  ~^~~~~~~~~
bank.cpp:16:16: warning: 'void* __builtin_memset(void*, int, long unsigned int)' writing 4194308 bytes into a region of size 4000040 overflows the destination [-Wstringop-overflow=]
   16 |         cov[i] = -1;
      |         ~~~~~~~^~~~
bank.cpp:5:5: note: destination object 'cov' of size 4000040
    5 | int cov[1000010], mon[1000010], notes[30], ppl[30], n, m;
      |     ^~~

• Subtask 1: 0 / 19
• Subtask 2: 0 / 25
• Subtask 3: 0 / 27
• Subtask 4: 0 / 29