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895 Jumping Around data structures divide and conquer dp dsu graphs shortest paths trees Statement F Educational Codeforces Round 111 (Rated for Div. 2) {1550} PROGRAMMING Educational Codeforces Round 111 Editorial
1051 Serious Business data structures divide and conquer dp shortest paths Statement D Codeforces Round 775 (Div. 1, based on Moscow Open Olympiad in Informatics) {1648} PROGRAMMING 2000.0 Codeforces Round #775 Editorial
2118 Long Way Home data structures divide and conquer dp geometry graphs shortest paths Statement E Codeforces Round 816 (Div. 2) {1715} PROGRAMMING 2750.0 Codeforces Round #816 (Div. 2) editorial