Submission #227358

#	Time	Username	Problem	Language	Result	Execution time	Memory
227358		cgiosy	조개 줍기 (KOI17_shell)	C++17	Compilation error	0 ms	0 KiB

shell

#include <bits/stdc++.h>
using namespace std;

alignas(64) int A[1520][1520]{};
int main() {
	ios::sync_with_stdio(0);cin.tie(0);
	int N; long long s=0;
	cin>>N;
	for(int i=1; i<=N; i++) for(int j=1; j<=N; j++) {
		cin>>A[i][j];
		s+=A[i][j]+=max(A[i-1][j], A[i][j-1]);
	}
	cout<<s<<'\n';
	for(int q=0; q<N; q++) {
		char t;
		int i, l;
		cin>>t>>i>>l;
		if(t=='U') {
			int r=l+1;
			while(l<r) {
				while(r<=N && A[i-1][r]<A[i][r-1]+1) r++;
				for(int j=l; j<r; j++) A[i][j]++;
				s+=r-l;
				if(++i>N) break;
				while(l<r && A[i-1][l]<=A[i][l-1]) l++;
			}
		} else {
			while(l<r) {
				int r=l+1;
				while(r<=N && A[i-1][r]<A[i][r-1]-1) r++;
				for(int j=l; j<r; j++) A[i][j]--;
				s-=r-l;
				if(++i>N) break;
				while(l<r && A[i-1][l]<=A[i][l-1]) l++;
			}
		}
		cout<<s<<'\n';
	}
}

Compilation message (stderr)

shell.cpp: In function 'int main()':
shell.cpp:28:12: error: 'r' was not declared in this scope
    while(l<r) {
            ^