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6 problems

  • 1
ID Problem Show tags Hide tags AC / Tried Difficulty
143 P1143  子串个数
  • 数论
  • 哈希表
  • 贡献法计数
  • 阿里
  • 阿里云
7 / 73 5
150 P1150  子序列个数
  • 数论
  • 贡献法计数
  • 阿里
1 / 9 7
151 P1151  异或数组
  • 数论
  • 贡献法计数
  • 腾讯
1 / 13 7
270 P1270  非空子序列
  • 数论
  • 贡献法计数
  • 乘法原理
  • 科大讯飞
1 / 119 5
784 P1784  字符串权值(三)
  • 阿里
  • 蚂蚁
  • 贡献法计数
  • 数位DP
1 / 3 7
1025 P2025  【淘天研发岗】2025-3-15-第一题-MEX(三)
  • 阿里
  • 淘天
  • 贡献法计数
  • 容斥定理
2 / 17 7
  • 1

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