Submission #723490

#TimeUsernameProblemLanguageResultExecution timeMemory
723490PanosPaskBank (IZhO14_bank)C++14
100 / 100
85 ms8508 KiB
#include <bits/stdc++.h> #define MAXN 20 #define CHECK_BIT(var, pos) (var & (1<<pos)) using namespace std; int n, m; // dp[i]: The maximum prefix of people we can pay with the subset i int dp[(1<<MAXN)]; // leftovers[i]: How much money is leftovers after paying the dp[i] people int leftovers[(1<<MAXN)]; int reqs[MAXN + 2]; int notes[MAXN + 2]; int main(void) { scanf("%d %d", &n, &m); for (int i = 0; i < n; i++) scanf("%d", &reqs[i]); for (int i = 0; i < m; i++) scanf("%d", &notes[i]); memset(dp, -1, sizeof(dp)); memset(leftovers, -1, sizeof(leftovers)); dp[0] = 0; leftovers[0] = 0; for (int s = 0; s < (1<<m); s++) { if (dp[s] == -1) continue; if (dp[s] == n) { printf("YES\n"); return 0; } int to_cover = reqs[dp[s]]; for (int i = 0; i < m; i++) { if (CHECK_BIT(s, i)) continue; // Use i as the last banknote int val = notes[i]; if (val + leftovers[s] < to_cover) { dp[s + (1<<i)] = dp[s]; leftovers[s + (1<<i)] = leftovers[s] + val; } else if (val + leftovers[s] == to_cover) { dp[s + (1<<i)] = dp[s] + 1; leftovers[s + (1<<i)] = 0; } } } printf("NO\n"); return 0; }

Compilation message (stderr)

bank.cpp: In function 'int main()':
bank.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);
      |     ~~~~~^~~~~~~~~~~~~~~~~
bank.cpp:21:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         scanf("%d", &reqs[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~
bank.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         scanf("%d", &notes[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~
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