Submission #895034

#	Time	Username	Problem	Language	Result	Execution time	Memory
895034		hariaakas646	Group Photo (JOI21_ho_t3)	C++17	0 / 100	0 ms	348 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define scd(t) scanf("%d", &t)
#define sclld(t) scanf("%lld", &t);
#define forr(i, l, r) for(int i=l; i<r; i++)
#define frange(i, l) forr(i, 0, l)
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define all(x) x.begin(), x.end()

typedef vector<int> vi;
typedef pair<int, int> pii;
typedef vector<pii> vii;
typedef long long lli;
typedef vector<vi> vvi;
typedef vector<lli> vll;
typedef vector<bool> vb;

void usaco() {
	freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
}

int main() {
	// usaco();
	int n;
	scd(n);

	vi vec(n);
	frange(i, n) scd(vec[i]);

	vector<vector<pair<int, vi>>> dp(n, vector<pair<int, vi>>(n));

	frange(i, n) {
		vi tmp;
		tmp.pb(vec[i]);
		dp[i][i] = mp(i, tmp);
	}

	forr(i, 1, n) {
		for(int l=0; l+i<n; l++) {
			int r = l+i;
			auto p1 = dp[l][r-1];

			p1.s.pb(vec[r]);
			int j = p1.s.size()-1;
			while(j > 0 && p1.s[j] + 2 <= p1.s[j-1]) {
				p1.f++;
				swap(p1.s[j], p1.s[j-1]);
				j--;
			}

			auto p2 = dp[l+1][r];
			vi tmp;
			tmp.pb(vec[l]);
			for(auto e : p2.s) tmp.pb(e);

			j = 0;
			while(j < p2.s.size()-1 && p2.s[j] >= p2.s[j+1]+2) {
				p2.f++;
				swap(p2.s[j], p2.s[j-1]);
				j++;
			}
			dp[l][r] = min(p1, p2);
		}
	}
	printf("%d", dp[0][n-1].f);
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:62:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |    while(j < p2.s.size()-1 && p2.s[j] >= p2.s[j+1]+2) {
      |          ~~^~~~~~~~~~~~~~~
Main.cpp: In function 'void usaco()':
Main.cpp:24:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |  freopen("/media/hariaakash646/785EF1075EF0BF46/CompetitiveProgramming/input.in", "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp: In function 'int main()':
Main.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
Main.cpp:30:2: note: in expansion of macro 'scd'
   30 |  scd(n);
      |  ^~~
Main.cpp:5:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    5 | #define scd(t) scanf("%d", &t)
      |                ~~~~~^~~~~~~~~~
Main.cpp:33:15: note: in expansion of macro 'scd'
   33 |  frange(i, n) scd(vec[i]);
      |               ^~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 32
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36