#include<cstdio> #include<vector> using namespace std; int main() { int bottlesNum; int requiredFromLeft; scanf("%d %d\n", &bottlesNum, &requiredFromLeft); vector<int> brands(bottlesNum, 0); for (int i = 0; i < bottlesNum; i++) { scanf("%d", &brands[i]); } vector<bool> included(bottlesNum, false); int nextIndex = 0; long long movesNum = 0; for (int i = 0; i < bottlesNum && nextIndex < requiredFromLeft; i++) { int brand = brands[i]; if (!included[brand - 1]) { included[brand - 1] = true; movesNum += i - nextIndex; nextIndex++; } } if (nextIndex < requiredFromLeft) { printf("-1\n"); } else { printf("%lld\n", movesNum); } return 0; }
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | #include<cstdio> #include<vector> using namespace std; int main() { int bottlesNum; int requiredFromLeft; scanf("%d %d\n", &bottlesNum, &requiredFromLeft); vector<int> brands(bottlesNum, 0); for (int i = 0; i < bottlesNum; i++) { scanf("%d", &brands[i]); } vector<bool> included(bottlesNum, false); int nextIndex = 0; long long movesNum = 0; for (int i = 0; i < bottlesNum && nextIndex < requiredFromLeft; i++) { int brand = brands[i]; if (!included[brand - 1]) { included[brand - 1] = true; movesNum += i - nextIndex; nextIndex++; } } if (nextIndex < requiredFromLeft) { printf("-1\n"); } else { printf("%lld\n", movesNum); } return 0; } |