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| Problem | Category | Points | AC % | Users | |
|---|---|---|---|---|---|
| Reading Books. | CSES | 100p | 44.4% | 22 | |
| Lectura Veloz | Olimpiada Cubana de Informática | 100p | 39.4% | 124 | |
| Reconocimiento social | III Copa Nacional | 100p | 9.0% | 22 | |
| Rectángulos. | Concurso Provincial VCL | 100p | 33.8% | 88 | |
| Rectangle Cutting. | CSES | 100p | 29.5% | 24 | |
| Red Confiable. | Uncategorized | 100p | 7.4% | 24 | |
| Redistribución de regalos. | USACO | 100p | 50.0% | 1 | |
| Redistribución. | Uncategorized | 100p | 37.4% | 47 | |
| Red Moo. | USACO | 100p | 25.0% | 1 | |
| Field Reduction | USACO | 100p | 35.0% | 20 | |
| Regados | COPA ABEL SANTAMARIA | 100p | 66.5% | 137 | |
| Reiner y Berthlot | USACO | 100p | 12.8% | 55 | |
| Rejilla de desplazamiento | COJ | 100p | 17.2% | 26 | |
| Retransmisión de mensajes. | USACO | 100p | 60.0% | 6 | |
| Carrera de Relevos. | USACO | 100p | 27.2% | 20 | |
| Relieve de columnas | COCI | 100p | 10.6% | 5 | |
| Reubicación. | USACO | 100p | 29.6% | 26 | |
| Sumas y Restos | Atcoder | 100p | 3.8% | 9 | |
| Papitas fritas | Uncategorized | 100p | 8.3% | 5 | |
| Removal Game. | CSES | 100p | 48.1% | 22 | |
| Removing Digits. | CSES | 100p | 75.7% | 63 | |
| Removing Digits. | CSES | 100p | 75.7% | 69 | |
| Servicio de Renta | Olimpiada Cubana de Informática | 100p | 15.0% | 15 | |
| Reorganizando | PSNIC | 100p | 2.6% | 4 | |
| Repetitions. | CSES | 100p | 29.5% | 102 | |
| Fibonacci series | PSNIC | 100p | 2.3% | 3 | |
| Replicación. | USACO | 100p | 100.0% | 1 | |
| Required Substring. | CSES | 100p | 15.0% | 3 | |
| Restaurant Customers. | CSES | 100p | 40.6% | 46 | |
| Mismos restos. | COCI | 100 | 23.7% | 21 | |
| Paradas de Descanso. | USACO | 100p | 100.0% | 1 | |
| Expresión de paréntesis. | Uncategorized | 100p | 3.3% | 3 | |
| Reunión de los estudiantes | PSNIC | 100p | 4.4% | 2 | |
| Aplicando Reverso | Olimpiada Cubana de Informática | 100p | 34.5% | 69 | |
| The Great Revegetation. | USACO | 100p | 54.4% | 15 | |
| Reversals and Sums. | CSES | 100p | 100.0% | 1 | |
| Redistributing Gifts. | USACO | 100p | 14.8% | 4 | |
| Cruce de río. | USACO | 100p | 32.4% | 14 | |
| Range Updates and Sums. | CSES | 100p | 41.7% | 8 | |
| Road Construction. | CSES | 100p | 63.6% | 30 | |
| Road Reparation. | CSES | 100p | 49.3% | 28 | |
| El robot Machin | Santiago de Cuba | 100p | 26.3% | 5 | |
| Robot desobediente. | Codeforces | 100p | 32.1% | 205 | |
| Robot Path. | CSES | 100p | 7.1% | 1 | |
| Robots buscadores de agua | CIIC | 100p | 0.0% | 0 | |
| Cabezas de Rosas | Olimpiada Cubana de Informática | 45p | 17.0% | 44 | |
| Batalla Bovina de Canasta. | USACO | 100p | 100.0% | 1 | |
| Números Rounaround. | USACO | 100p | 9.0% | 34 | |
| Diseño de Ruta | USACO | 100p | 45.5% | 5 | |
| Shortest Routes I. | CSES | 100p | 23.0% | 60 |